Cabletron Systems Switch SSIM H2 02 User Manual
SSIM-H2-02  
Fast Ethernet - Translational Switch  
SmartStack Interface Module  
Installation  
and  
User Guide  
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ii  
FCC Notice  
This device complies with Part 15 of the FCC rules. Operation is subject to the following  
two conditions: (1) this device may not cause harmful interference, and (2) this device  
must accept any interference received, including interference that may cause undesired  
operation.  
NOTE: This equipment has been tested and found to comply with the limits for a Class A  
digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide  
reasonable protection against harmful interference when the equipment is operated in a  
commercial environment. This equipment uses, generates, and can radiate radio  
frequency energy and if not installed in accordance with the operator’s manual, may  
cause harmful interference to radio communications. Operation of this equipment in a  
residential area is likely to cause interference in which case the user will be required to  
correct the interference at his own expense.  
WARNING: Changes or modifications made to this device which are not expressly  
approved by the party responsible for compliance could void the user’s authority to  
operate the equipment.  
VCCI Notice  
This is a Class A product based on the standard of the Voluntary Control Council for  
Interference by Information Technology Equipment (VCCI). If this equipment is used in  
a domestic environment, radio disturbance may arise. When such trouble occurs, the user  
may be required to take corrective actions.  
Industry Canada Notice  
This digital apparatus does not exceed the Class A limits for radio noise emissions from  
digital apparatus set out in the Radio Interference Regulations of the Canadian  
Department of Communications.  
Le présent appareil numérique n'émet pas de bruits radioélectriques dépassant les limites  
applicables aux appareils numériques de la class A prescrites dans le Règlement sur le  
brouillage radioélectrique édicté par le ministère des Communications du Canada.  
Notice  
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iii  
Declaration of Conformity  
Addendum  
Application of Council Directive(s): 89/336/EEC  
73/23/EEC  
Manufacturer’s Name: Cabletron Systems, Inc.  
Manufacturer’s Address: 35 Industrial Way  
PO Box 5005  
Rochester, NH 03867  
European Representative Name: Mr. J. Solari  
European Representative Address: Cabletron Systems Limited  
Nexus House,  
Newbury Business Park  
London Road, Newbury  
Berkshire RG13 2PZ, England  
Conformance to Directive(s)/Product Standards: EC Directive 89/336/EEC  
EC Directive 73/23/EEC  
EN 55022  
EN 50082-1  
EN 60950  
Equipment Type/Environment: Networking Equipment, for use  
in a Commercial or Light  
Industrial Environment.  
We the undersigned, hereby declare, under our sole responsibility, that the equipment  
packaged with this notice conforms to the above directives.  
Manufacturer  
Legal Representative in Europe  
Mr. Ronald Fotino  
Full Name  
Mr. J. Solari  
Full Name  
Principal Compliance Engineer  
Title  
Managing Director - E.M.E.A.  
Title  
Rochester, NH, USA  
Location  
Newbury, Berkshire, England  
Location  
Notice  
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iv  
Notice  
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v
Table of Contents  
1. Introduction  
1
MIB Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
2. Installation  
5
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . 5  
Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . 6  
Physical Installation . . . . . . . . . . . . . . . . . . . . . . . . 7  
Software Installation . . . . . . . . . . . . . . . . . . . . . . . . 8  
TFTP Download . . . . . . . . . . . . . . . . . . . . . . . . 8  
Serial Download . . . . . . . . . . . . . . . . . . . . . . . . 9  
Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
Power-On Self Test . . . . . . . . . . . . . . . . . . . . . . . 11  
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
Default Configuration. . . . . . . . . . . . . . . . . . . . . 12  
3. Configuration  
13  
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
Ports, Port Groups and VLANs. . . . . . . . . . . . . . . . 14  
TS Virtual Ports and VLAN Tagging . . . . . . . . . . . . . 15  
Virtual Port Restriction . . . . . . . . . . . . . . . . . . . . 15  
Ring Number Restriction . . . . . . . . . . . . . . . . . . . 15  
Bridging Modes. . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Source Routed Switching (SRS) Operation Mode . . . . . . 16  
Source Routed Transparent Bridging (SRT) Mode. . . . . . 16  
Source Routed Bridging (SRB) Mode . . . . . . . . . . . . 17  
Redundant Connections to Fast Ethernet Network . . . . . . . 19  
Network Scenarios . . . . . . . . . . . . . . . . . . . . . . 19  
Spanning Tree Configuration. . . . . . . . . . . . . . . . . 21  
Technical Background . . . . . . . . . . . . . . . . . . . . 24  
General Guidelines. . . . . . . . . . . . . . . . . . . . . . . . 26  
Navigating Within the Menus. . . . . . . . . . . . . . . . . 27  
Configuration Overview . . . . . . . . . . . . . . . . . . . . . 27  
VLAN Configuration . . . . . . . . . . . . . . . . . . . . . . . 28  
BRF Configuration . . . . . . . . . . . . . . . . . . . . . . 28  
Local VLAN Port Configuration. . . . . . . . . . . . . . . . 28  
Port Configuration - TS Ports. . . . . . . . . . . . . . . . . . . 28  
Virtual Port Configuration. . . . . . . . . . . . . . . . . . . 29  
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Frame Conversion Configuration . . . . . . . . . . . . . . . . . 32  
TCP/IP Conversion Status. . . . . . . . . . . . . . . . . . . 32  
TCP/IP Conversion Parameters Change . . . . . . . . . . . 32  
Novell Conversion Status . . . . . . . . . . . . . . . . . . . 34  
Novell Conversion Parameters Change . . . . . . . . . . . . 34  
NetBios Conversion Status . . . . . . . . . . . . . . . . . . 36  
NetBios Conversion Parameters Change . . . . . . . . . . . 36  
SNA Conversion Status . . . . . . . . . . . . . . . . . . . . 38  
SNA Conversion Parameters Change. . . . . . . . . . . . . 38  
Other Frames w/SNAP Conversion Status . . . . . . . . . . 40  
Other Frames w/SNAP Conversion Parameters Change . . . 40  
Other Frames w/o SNAP Conversion Status . . . . . . . . . 42  
Other Frames w/o SNAP Conversion Parameters Change . . 42  
Dual Home FEP Addresses Configuration . . . . . . . . . . 43  
4. Statistics  
45  
Statistics Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . 46  
Port Status. . . . . . . . . . . . . . . . . . . . . . . . . . . 47  
Port Statistics . . . . . . . . . . . . . . . . . . . . . . . . . 48  
General Statistics . . . . . . . . . . . . . . . . . . . . . . . 48  
Discarded Frames . . . . . . . . . . . . . . . . . . . . . . . 49  
802.3 Statistics . . . . . . . . . . . . . . . . . . . . . . . . 51  
Traffic Counters . . . . . . . . . . . . . . . . . . . . . . . . 51  
Error Counters . . . . . . . . . . . . . . . . . . . . . . . . . 51  
Virtual Port Statistics. . . . . . . . . . . . . . . . . . . . . . 53  
Discarded Frames Statistics. . . . . . . . . . . . . . . . . . 53  
5. Getting in Touch with Technical Support  
Appendix A. Abbreviations  
57  
59  
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vii  
List of Figures  
Figure 1. SSIM-H2-02 Switch SmartStack Interface Module . . . . .  
Figure 2. Removing the Expansion Slot Cover . . . . . . . . . . . .  
Figure 3. Installing the SSIM-H2-02 . . . . . . . . . . . . . . . . . .  
1
7
8
Figure 4. Ethernet CRF in SRT Bridging Mode . . . . . . . . . . . . 16  
Figure 5. Ethernet CRF in SRB Bridging Mode . . . . . . . . . . . . 17  
Figure 6. Frame Duplication . . . . . . . . . . . . . . . . . . . . . . 18  
Figure 7. Frame Looping . . . . . . . . . . . . . . . . . . . . . . . . 19  
Figure 8. Broken Ethernet Cloud . . . . . . . . . . . . . . . . . . . 20  
Figure 9. Redundant Connections to Fast Ethernet Network . . . . . 21  
Figure 10. Load Sharing in Redundant Connections to Fast Ethernet  
Network . . . . . . . . . . . . . . . . . . . . . . . . . . . 22  
Figure 11. STP Cost Modification . . . . . . . . . . . . . . . . . . . 24  
Figure 12. Main Switch Menu . . . . . . . . . . . . . . . . . . . . . 26  
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viii  
List of Tables  
Table 1. Features and Benefits  
Table 2. LEDs at the Left on the Front Panel . . . . . . . . . . . . . 10  
Table 3. LEDs at the Right of Every Port . . . . . . . . . . . . . . . 10  
Table 4. Translational Switch Physical Port Status . . . . . . . . . . 29  
Table 5. Translational Switch Virtual Port Status . . . . . . . . . . . 30  
. . . . . . . . . . . . . . . . . . . . 2  
Table 6. Translational Switch Configured and Actual Frame SIze . . . 30  
Table 7. IP: Token Ring Format . . . . . . . . . . . . . . . . . . . . 32  
Table 8. IP: Ethernet Format . . . . . . . . . . . . . . . . . . . . . . 33  
Table 9. IP: Source Routing . . . . . . . . . . . . . . . . . . . . . . 33  
Table 10. IP: Explorer Frames Type . . . . . . . . . . . . . . . . . . 34  
Table 11. IP: Explorer Frames Type . . . . . . . . . . . . . . . . . . 34  
Table 12. NOVELL: Token Ring Format . . . . . . . . . . . . . . . . 35  
Table 13. NOVELL: Ethernet Format  
. . . . . . . . . . . . . . . . . 35  
Table 14. NOVELL: Source Routing . . . . . . . . . . . . . . . . . . 36  
Table 15. Novell: Explorer Frames Type . . . . . . . . . . . . . . . . 36  
Table 16. NetBios: Token Ring Format . . . . . . . . . . . . . . . . 37  
Table 17. NetBios: Ethernet Format . . . . . . . . . . . . . . . . . . 37  
Table 18. NetBios: Source Routing . . . . . . . . . . . . . . . . . . 37  
Table 19. NetBios: Explorer Frames Type . . . . . . . . . . . . . . . 38  
Table 20. SNA: Token Ring Format . . . . . . . . . . . . . . . . . . 38  
Table 21. SNA: Ethernet Format . . . . . . . . . . . . . . . . . . . . 39  
Table 22. SNA: Source Routing . . . . . . . . . . . . . . . . . . . . 39  
Table 23. SNA: Explorer Frames Type  
. . . . . . . . . . . . . . . . 40  
Table 24. Other Frames w/SNAP: Token Ring Format . . . . . . . . 40  
Table 25. Other Frames w/SNAP: Ethernet Format . . . . . . . . . . 41  
Table 26. Other Frames w/SNAP: Source Routing . . . . . . . . . . 41  
Table 27. Other Frames w/SNAP: Explorer Frames Type . . . . . . . 41  
Table 28. Other Frames w/o SNAP: Token Ring Format . . . . . . . 42  
Table 29. Other Frames w/o SNAP: Ethernet Format . . . . . . . . . 42  
Table 30. Other Frames w/o SNAP: Source Routing . . . . . . . . . 43  
Table 31. Other Frames w/o SNAP: Explorer Frames Type . . . . . . 43  
SSIM-H2-02 Fast Ethernet - Translational Switch SmartStack Interface Module Installation and User Guide  
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1
1. Introduction  
The Cabletron Systems SmartStack SSIM-H2-02 2-port Translational Switch  
SSIM (SmartStack SSIM-H2-02) provides connectivity to 10/100 Mbps Fast  
Ethernet for the SmartStack STS16-20RM Token Ring Switch. Designed for high  
performance and low latency, the SmartStack SSIM-H2-02 seamlessly integrates  
legacy Token Ring networks and Fast Ethernet backbones.  
➽
Note: References to SmartStack STS16-20RM are also applicable to SmartStack  
STS16-20FRM.  
The module mounts in one of the two front panel expansion module slots on the  
SmartStack STS16-20RM switch.  
Figure 1. SSIM-H2-02 Switch SmartStack Interface Module  
The SSIM-H2-02 conforms to the IEEE standard 802.3U for 100 Mbps Fast  
Ethernet 100BASE-TX.  
A Translational Switch (TS) port can connect to a standard Fast Ethernet adapter or  
it can act as a trunk port and carry traffic from all of the 63 VLANs it is possible to  
configure in the switch. This is achieved using standard IEEE 802.1Q VLAN frame  
tagging. For each VLAN, a virtual port is created which behaves much like an  
ordinary Ethernet port.  
The module supports all of the switching modes implemented in the switch. Eight  
LEDs on the front panel indicate the overall operational state of the module and the  
two ports. Configuration and detailed status information is available from the  
switch console or from the graphical management application.  
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2
The module supports translational switching for all key network protocols (such as  
IP, IPX, SNA, NetBios) and generic conversion:  
Feature  
SRT and SRB  
Description  
Support for SRT and SRB bridging.  
IEEE 802.1Q  
This standard frame-tagging protocol is used  
to carry frames that belong to different  
VLANs over the same physical Fast Ethernet  
link.  
Benefit: Enables VLAN trunking with other  
standards based equipment.  
IEEE 802.1D  
IEEE 802.1D Spanning Tree on the Ethernet  
side with a manual configuration option.  
IP multicasts address  
translation  
IP multicasts translated to a single functional  
address on the Token-Ring side, and IP  
multicasts on the Token-Ring side translated to  
multiple MAC addresses on the Ethernet side.  
IP fragmentation  
IP fragmentation makes it possible to easily  
connect IP networks between Token-Ring and  
Ethernet networks.  
NetBios addresses  
translation  
Translation of NetBios functional address from  
the Token-Ring side to a specific Ethernet  
group address, and frames with an additional  
functional addresses from Token-Ring side are  
not forwarded on the Ethernet side.  
Source-Routing  
Source-Routing is supported.  
Benefit: Provides optimal Token-Ring  
connectivity and ensures smooth integration  
into existing Source-Routing based networks.  
For each supported protocol, frames can be  
sent as transparent or source-routed traffic.  
Table 1. Features and Benefits  
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3
Feature  
Description  
SNMP  
SNMP is supported via the host processor (the  
processor on the SmartStack STS16-20RM).  
This makes it possible to configure the device  
in a standards-based way and as an integrated  
part of the LAN switch.  
Can serve multiple  
switches in one stack  
The SmartStack SSIM-H2-02 can serve as  
uplink for multiple LAN switches  
interconnected by a stacker. This reduces the  
cost of connecting a number of LAN switches  
to an Fast Ethernet backbone.  
Dual home FEP  
A Token-Ring network using SRB can support  
duplicate MAC addresses. This capability has  
been exploited by SNA gateways, which can  
provide a redundant host connection: two  
gateways have the same MAC address but are  
on different rings and due to the source routing  
discovery process the SNA sessions are  
randomly distributed between the two  
gateways. Sessions are established between  
configured MAC addresses.  
Protocol filters  
The SmartStack SSIM-H2-02 offers the same  
protocol filters as the SmartStack STS16-  
20RM. This makes for consistent protocol  
filtering and thereby reduces the risk of  
network congestion and security breaches.  
Broadcast Suppression  
On output, the Translational Switch SSIM  
must keep the rate of broadcast frames sent to  
Ethernet within the limit set by the Maximum  
Broadcast Frame Count per Second  
configuration parameter. Broadcasts include:  
- ARE, STE source routed frames  
- unknown destination frames  
- frames with the MAC header broadcast bit set  
Table 1. Features and Benefits  
SSIM-H2-02 Fast Ethernet - Translational Switch SmartStack Interface Module Installation and User Guide  
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4
MIB Support  
•
•
•
•
•
•
•
•
RFC 1213: MIB II  
RFC 1493: Bridge MIB  
RFC 1525: SR Bridge MIB  
RFC 1573: Evaluation of Interfaces Group of MIB II  
RFC 1650: Dot3 MIB  
RFC 1757: RMON MIB  
STS16 MIB  
FEUplink MIB  
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5
2. Installation  
This chapter describes how to install, connect, and start using the SSIM-H2-02. The  
following main topics are covered:  
•
•
•
•
•
•
•
•
Package Contents  
Installation Procedure  
Hardware Installation  
Software Installation  
Cabling  
LEDs  
Power-On Self Test  
Configuration  
Package Contents  
Your SSIM-H2-02 package contains the following items:  
•
•
One SmartStack SSIM-H2-02 2-Port Translational Switch SSIM (UTP).  
One CD-ROM containing the Token Ring switch software and the Switch  
Manager for Windows and HP Open View for Windows, as well as user  
documentation in pdf format.  
•
One SSIM-H2-02 Switch SmartStack Interface Module Installation and User  
Guide (this guide).  
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Installation Procedure  
The SSIM-H2-02 is packaged with the software for both the module itself and the  
SmartStack STS16-20RM Token Ring Switch. The switch is also supplied with  
both software images. To ensure compatibility between the module and the switch,  
the latest of the two software revisions should be installed.  
The switch and SSIM-H2-02 software is also available via Cabletron Systems's  
online services, including the Cabletron Systems Web site.  
Install the module as follows:  
1. Install the software in the switch. See the switch manual for instructions on  
downloading the software.  
2. Optionally, clear the NVRAM in the base switch. This will erase all  
configuration in the switch.  
3. Reset the switch to activate the new software.  
4. If the NVRAM was cleared in step 2, re-establish the switch configuration.  
Verify that the switch is operating correctly.  
5. Turn off the switch.  
➽
Warning: Be sure to install a version of the base switch software that supports the  
SSIM-H2-02 (version 3.10 or later) before physically inserting the module.  
Otherwise, the switch will not recognize it and will cease functioning.  
6. Physically install the module in one of the two expansion slots. See the  
“Hardware Installation” on page 7 for detailed instructions.  
7. Turn on the switch.  
8. Download the software for the module. See the “Software Installation” on  
page 8 for detailed instructions.  
9. If you plan to use the graphical SmartStack Manager application, install it now  
on your PC.  
10. If necessary, configure the module. For details, see chapter 3, “Configuration”.  
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Hardware Installation  
➽
Warning: Expansion modules are not hot-swappable. If you install or remove  
expansion modules while the power to the switch is on, damage may occur to the  
switch and to the module.  
➽
Warning: Be sure to install a version of the base switch software that supports the  
SSIM-H2-02 (version 3.10 or later) before physically inserting the module.  
Otherwise, the switch will not recognize it and this may in some cases corrupt the  
configuration.  
Use the following steps to install the module in a SmartStack STS16-20RM Token  
Ring Switch:  
1. Power off the base switch by unplugging the power cord from the power outlet.  
If the switch uses the optional SmartStack STS-PSU Redundant Power Unit,  
unplug the connector from the base switch as well.  
2. Select an empty expansion module slot in which to install the module. You can  
install the module in either or both of the slots.  
3. Remove the cover from the expansion slot on the front of the switch by  
loosening the two retaining thumb screws (see Figure 2). Keep the plate for use  
in the cases when the expansion module is removed.  
Figure 2. Removing the Expansion Slot Cover  
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4. Carefully insert the module into the rails on each side of the expansion slot,  
sliding it back until the connector on the module is seated into the connector at  
the back of the slot. See Figure 3. When the module is fully seated, the module  
faceplate will be flush with the front of the base switch.  
Figure 3. Installing the SSIM-H2-02  
5. Secure the module with the two attached thumb screws.  
6. Re-apply power to the switch.  
Software Installation  
Before you can use your SSIM-H2-02, you have to install the module software  
image. The software image can be downloaded to the module via TFTP or via a  
serial line. Search the disks supplied with the module for a file named FEyyzz.BIN.  
The letters yyzz in the file name represent the version number of the software. For  
example, FE0310.BIN is version 3.10 of the software image.  
TFTP Download  
1. Copy the software image to a suitable directory on the TFTP server.  
2. Set-up VLAN IP configuration on the VLAN which will be used to download.  
3. From the main menu in the console, select Download→Upload.  
4. Select TFTP Download→Upload.  
5. Set the IP address of the TFTP server. Also, set the download VLAN (the BRF  
which will be used to perform the download).  
6. Select TS Firmware Download.  
7. Select TS Firmware Download Filename and type the file name of the  
software image to download.  
8. Select Execute TS Image Network Download to start the download.  
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The console will display the download activity while the software is transferred  
over the network by counting received blocks. When the software has been  
transferred, you will see the following messages:  
Network download complete. Now transferring to TS  
Module(s), please wait...  
Download of TS firmware complete - TS module(s) being  
reinitialized...  
➽
➽
Warning: If you use Telnet as a manager console, download activity will not be  
displayed.  
The software image is then programmed into the FLASH memory on the module.  
The software image remains in memory until it is replaced. When the software  
installation is complete, the module is started for normal operation, and the  
following message is displayed:  
Press <RETURN> to continue...  
Note: Remember that new module software is active immediately after it is  
downloaded, but to activate the module’s software you must restart the switch.  
Serial Download  
1. From the main menu, select Download→Upload.  
2. Select Serial Link Download.  
3. Select TS Firmware Download.  
4. Using your terminal software, transfer the software image to the SSIM-H2-02  
with the X-Modem protocol. The transfer may take several minutes, depending  
on your terminal emulator baud.  
The software image is then programmed into the FLASH memory of the module,  
and will remain there until it is replaced. When the software installation is  
complete, the module is started for normal operation and the following message is  
displayed:  
Press <RETURN> to continue...  
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Cabling  
The module uses standard or crossed-over UTP-5 copper cables. The maximum  
cable length is 100 m (328 feet).  
1. Insert the modular RJ-45 jack from either end of a standard or crossed-over  
UTP-5 cable into one of the connectors on the SSIM-H2-02 front panel.  
2. Connect the other end of the cable to:  
— another TS port (using the crossed-over UTP-5 cable)  
— 100/10 MB Ethernet adapter (using the crossed-over UTP-5 cable)  
— 100/10 MB Ethernet switch or hub port (using the standard UTP-5 cable)  
LEDs  
There are eight LEDs on the front panel of the SSIM-H2-02. During normal  
operation, the two LEDs on the left side of the front panel indicate the module  
status:  
LED  
Position  
Top  
State  
Meaning  
DIAG (green)  
On  
Off  
On  
Off  
Diagnostics are in process.  
No diagnostics are in process.  
A module failure has occurred.  
ERR (yellow)  
Bottom  
The module is working  
correctly.  
Table 2. LEDs at the Left on the Front Panel  
The three LEDs on the right of every port indicate the port status:  
LED  
Position  
Top  
State  
Meaning  
ACTIVITY  
(green)  
Flashing  
The port is receiving or  
transmitting frames.  
Off  
Currently no traffic on the port.  
Table 3. LEDs at the Right of Every Port  
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100 (green)  
Middle  
Bottom  
On  
Off  
On  
Off  
The port is in 100 Mbps mode.  
The port is in 10 Mbps mode.  
The port is active.  
LINK (green)  
The port is disabled or not  
inserted.  
Table 3. LEDs at the Right of Every Port  
Power-On Self Test  
When you start the switch, it will run a power-on self-test to ensure that all the  
devices are working correctly. During this test, the switch will detect and start any  
module found in an expansion slot.  
The module will then perform an internal power-on self test. During the entire test,  
the DIAG and ERR LEDs will be lit while the other LEDs may turn on and off.  
The test lasts a few minutes. If no problems are found, the DIAG and ERR LEDs  
turn off and the module enters its normal operational state. If a problem is found,  
the DIAG LED will turn off and the ERR LED will remain on. Messages in the  
message log or on the console will indicate what the problem is.  
➽
Note: Switch Console message:  
Press RETURN key to activate console...  
means that the console is available, but it takes more time to activate the module.  
You can check if they are up in the Configuration→Module Information menu.  
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Configuration  
The SSIM-H2-02 can be configured in two ways:  
•
From the switch console, directly with a VT100 terminal emulator on the RS-  
232 port or via Telnet.  
•
By a SNMP based graphical management application.  
Console configuration is described in chapter 3, “Configuration”. The management  
application is described in the online help.  
All configuration parameters are stored by the switch and not in the module. This  
means that the modules can be exchanged without reconfiguring the switch. Note,  
however, that the module software image is stored on the SSIM-H2-02 itself and  
will follow the module when it is moved to another switch.  
Default Configuration  
When a SSIM-H2-02 is inserted into an expansion slot for the first time, the switch  
will generate a default configuration:  
•
•
Both TS ports are enabled.  
Both TS ports have a single virtual port in the default CRF.  
This configuration is suitable for connecting both TS adapters and other TS ports  
to the default CRF. If more advanced configurations are required, refer to  
chapter 3, “Configuration” for details.  
➽
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3. Configuration  
This chapter explains how to view and edit the configuration of the SSIM-H2-02  
using a VT100 terminal emulator attached directly to the SmartStack STS16-20RM  
Token Ring switch. The SSIM-H2-02 configuration can also be modified from a  
remote VT100 console via a Telnet session. (The manual supplied with the  
SmartStack STS16-20RM Token Ring Switch describes how to connect a network  
management console).  
This chapter is divided into the following sections:  
•
•
•
•
•
•
•
•
Introduction  
Bridging Modes  
Redundant Connections to Fast Ethernet Network  
General Guidelines  
Configuration Overview  
VLAN Configuration  
Port Configuration - TS Ports  
Frame Conversion Configuration  
For more information on configuration, see the SmartStack STS16-20RM/STS16-  
20FRM Token Ring Switch Installation and User Guide.  
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Introduction  
Each SSIM-H2-02 has two 100 Mbps Fast Ethernet ports. In the console  
configuration, port numbers are used to refer to ports, with ordinary Token Ring  
ports numbered 1 to 20. If a module is inserted into the left expansion slot, the TS  
ports are numbered 21 and 22. If a module is inserted into the right expansion slot,  
the TS ports are numbered 25 and 26. The number of modules in a stack is limited  
only by the number of available slots in the stack.  
The TS ports are configured much like ordinary Token Ring ports, and generally  
appear in all tables where ordinary Token Ring ports appear.  
Ports, Port Groups and VLANs  
This section briefly describes the VLAN concept and switching modes of the  
SmartStack STS16-20RM Switch. For more detailed information about these  
subjects, see the SmartStack STS16-20RM/STS16-20FRM Token Ring Switch  
Installation and User Guide.  
The switch supports up to 63 VLANs. A VLAN forms a single bridged domain and  
the visibility of MAC addresses, bridge and ring numbers as well as the scope of  
broadcast frames are limited to the VLAN in which they originate. Frames must be  
routed to move between VLANs.  
A VLAN consists of a number of port groups called CRFs (Concentrator Relay  
Functions). A CRF is conceptually equal to a ring. If a VLAN contains two or more  
CRFs they are conceptually connected by a multiport bridge called a BRF (Bridge  
Relay Function).  
The BRF performs either source-route bridging (SRB) or source-route transparent  
switching (SRT) between CRFs depending on the CRF configuration. CRFs  
configured for SRT switching form an SRT domain in which source-routed frames  
are source routed and non-source-routed frames are transparently switched.  
Each ordinary Token Ring port is assigned to a specific CRF, which also  
determines to which VLAN it belongs.  
In the default configuration, all ordinary Token Ring ports are assigned to the  
trcrf- default CRF, which belongs to the trbrf-default BRF. The only limitations to  
this are that the names cannot be changed, the parent BRF of the default CRF  
cannot be changed and other CRFs cannot be assigned to the trbrf-default BRF.  
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TS Virtual Ports and VLAN Tagging  
Unlike ordinary Token Ring ports, Translational Switch (TS) ports can function as  
trunk ports, which means they can carry traffic belonging to all of the 63 VLANs it  
is possible to configure in the switch over the same physical cable connection.  
Frames from different VLANs are distinguished by means of standard IEEE  
802.1Q frame tags. A frame tag consists of a 2-byte Ethernet Frame Type of value  
0x8100 (as described by standard P802.3ac) followed by a 2-byte Tag Control  
Information (TCI) field. It is inserted into the Ethernet frame after the frame header  
before transmission on the TS, and subsequently recognized and removed when the  
frame is received.  
To identify the VLAN to which the frame belongs, the TCI field makes use of a 12-  
bit VLAN identifier that uniquely identifies the BRF. It also contains a 3 bit priority  
field (described in “FC Modification” on page 31).  
Each TS port can be assigned to several CRFs, but there can be only one TS port  
per BRF/VLAN. A virtual port is created for each CRF to which the TS port is  
assigned. All virtual ports but one must be tagged (that is a single virtual port can  
be left untagged).  
Note that a TS port with a single untagged virtual port is functionally equivalent to  
an ordinary Token Ring port. This is also the default configuration, with the virtual  
port in trcrf-default.  
Virtual Port Restriction  
A TS port can have only one virtual port in each VLAN. Otherwise it would not be  
possible to distinguish frames from two virtual ports in the same VLAN, since they  
would have the same VLAN identifier.  
Ring Number Restriction  
All CRFs in which a TS port has virtual ports must have the same ring number. The  
ring number is a per-port parameter and not a per-virtual-port parameter. If this  
were not the case, the meaning of the RIF would be ambiguous and would depend  
on the VLAN to which the frame was sent. It would thus be incomprehensible to  
equipment that does not interpret VLAN tags.  
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Bridging Modes  
Source Routed Switching (SRS) Operation Mode  
SRS is the default mode of operation. This mode is also restored after NVRAM  
reset of the SmartStack STS16-20RM switch. In this mode, all ports of the switch  
are in the same CRF (including SmartStack SSIM-H2-02 switch ports). Frames are  
switched between ports based only on MAC addresses. In this mode, by default the  
spanning tree algorithm is disabled. If more than one translational link is used to  
connect to the Ethernet cloud, IEEE spanning tree on the CRF should be enabled.  
Source Routed Transparent Bridging (SRT) Mode  
➽
Note: SRT is the suggested mode of operation.  
If multiple CRFs are used on a switch, all translational links to the same Ethernet  
cloud should be grouped into one CRF. If spanning tree is to be used, enable STP  
on the CRF and BRF. The CRF’s STP should be set to IEEE; the BRFs’ STP should  
be set to Based on Bridging mode or IEEE. (For more information, see the  
SmartStack STS16-20RM/STS16-20FRM Token Ring Switch Installation and User  
Guide.)  
Note that this translational CRF is used only on the Token Ring side and is used  
toroute source-routed Token Ring frames toward the Ethernet cloud.  
Figure 4. Ethernet CRF in SRT Bridging Mode  
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Source Routed Bridging (SRB) Mode  
➽
Note: SRT is the suggested mode of operation.  
If multiple CRFs are used on a switch, all translational links to the same Ethernet  
cloud should be grouped into one CRF. If a CRF is created in SRB Bridging mode  
and spanning tree is to be used, IEEE STP must be manually configured on the BRF  
and CRF.  
Note that this translational CRF is used only on the Token Ring side and is used to  
route source-routed Token Ring frames toward the Ethernet cloud.  
Figure 5. Ethernet CRF in SRB Bridging Mode  
➽
Note: In this mode IEEE STP works on all SRT and SRB CRFs. For more  
information, see the SmartStack STS16-20RM/STS16-20FRM Token Ring Switch  
Installation and User Guide.  
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Redundant Connections to Fast Ethernet Network  
A connection to the Ethernet cloud can be made using several translational links  
from multiple switches. Translational links connected from one switch to the same  
Ethernet cloud should be grouped into one common CRF with an assigned LAN  
segment number. From each switch, one CRF can be connected to the same  
Ethernet cloud.  
Redundant connections between source routed and transparent networks may cause  
ARE frame duplication and infinite ARE frame loops as a result of discarding  
source routing information during translation from Token Ring to Ethernet format.  
There are, however, solutions to both problems:  
•
Infinite frame loops are eliminated by using a common LAN segment number  
for the entire Ethernet cloud or by proper spanning tree configuration. The  
recommended CRF number is 4095.  
•
Frame duplication is eliminated by a proper STP configuration allowing only  
one link between the Token Ring cloud and the Ethernet to be forwarding.  
Network Scenarios  
Preventing Frame Duplication  
The ARE duplication problem can occur only in a configuration with redundant  
translational links in different switches (see Figure 6).  
It is assumed that the network consists of a physically connected Ethernet cloud and  
a physically connected Token Ring cloud. The two clouds are then connected by a  
number of links that implement translational bridging.  
Figure 6. Frame Duplication  
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In a pure Token Ring network, an All Routes Explorer (ARE) frame generated from  
Station A traverses all rings only one time based on a Routing Information Field  
(RIF) expanded by each source-routed bridge. In this example, both translational  
links are in the forwarding state. An ARE frame originating in Ring1 may go  
through the Ethernet cloud and come back to Ring2. Because the RIF is lost when  
passing through the Ethernet cloud, LAN segment 1 is no longer included in the  
new RIF and the frame will be forwarded by Bridge1 from Ring2 back to Ring1.  
This results in frame duplication – after visiting Ring1 again, the frame will be  
discarded by the switch connected to Ring1.  
This issue can be resolved by making sure that only one translational link can be in  
the forwarding state.  
Preventing Frame Looping  
The network presented in Figure 6 was free of the ARE looping issue because the  
entire the Ethernet cloud had the same LAN Segment number – each switch had the  
same number for its Ethernet ports.  
In Figure 7, the switches have different LAN segment numbers for Ethernet ports  
(3 and 4). In this configuration, an infinite loop is created in addition to the frame  
duplication issue.  
Station A sends an ARE frame to Ring1, for example IP ARP with destination  
MAC being Broadcast. This frame is converted to a transparent broadcast and sent  
on Ethernet link 1. The frame is then received by the switch on link 2 and sent as  
an ARE frame to Ring 2 – note that the RIF does not contain LAN Segment 4. The  
ARE frame is then forwarded by Bridge 1 and switch link 1 back to the Ethernet,  
and so on.  
Figure 7. Frame Looping  
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This loop can be resolved by making sure that only one translational link is in the  
forwarding state or by using the same LAN segment number for all translational  
links.  
Using two different LAN segment numbers has some interesting advantages. If the  
Ethernet cloud becomes physically separated into two parts (see below), both parts  
can still communicate via the Token Ring cloud. If the Ethernet cloud is not split  
and the root of the spanning tree is on the Token Ring side, there might be a loss of  
connectivity between Ethernet stations depending on the CRF numbers configured.  
To avoid such hazardous situations, follow the recommendations for the spanning  
tree parameter (described below).  
Figure 8. Broken Ethernet Cloud  
Spanning Tree Configuration  
Running the IEEE Spanning Tree Protocol (STP) will create a single spanning tree  
covering the entire network. Depending on the topology and configured path costs,  
there will be one or more forwarding links between the two clouds.  
If there are multiple translational links in multiple switches, the path costs on these  
links should be selected so that only one forwards. This will prevent ARE  
duplication and the looping problem.  
Normally this can be achieved by assigning very large path costs on both sides of  
the translational links so that at most one can be forwarding. The SmartStack  
SSIM-H2-02 provides support for STP cost manipulation which does not require  
cost configuration on both sides of the link.  
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For each CRF of translational links connected to the same Ethernet cloud, a  
connection attribute can be assigned:  
— Primary connection – for a main connection to the Ethernet cloud (default  
value for each CRF). This connection is always forwarding if active.  
— Secondary 1 – for a backup connection to the Ethernet cloud. This  
connection is always blocking if the Primary is active.  
— Secondary 2 – for a second backup connection to the Ethernet cloud. This  
connection is always blocking if the Primary or the Secondary 1 are active.  
Each CRF of translational links connected to the same Ethernet cloud must have a  
different connection attribute set.  
Figure 9. Redundant Connections to Fast Ethernet Network  
The described spanning tree configuration results in exactly one forwarding link  
between Ethernet and Token Ring clouds, additional links becoming stand-by. To  
migrate from Token Ring to Ethernet you should, over time, physically split the  
Token Ring cloud into disjoint networks to increase bandwidth between Token  
Ring and Ethernet.  
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Figure 10 illustrates a network with two physically disjoint Ethernet clouds. Each  
SmartStack STS16-20RM switch in the configuration has one primary connection  
to one of the two Ethernet clouds and one secondary connection to the other cloud.  
This way redundancy for both Ethernet clouds is provided, while at the same time  
the traffic load between the Token Ring and Ethernet clouds is split between the  
two switches.  
Figure 10. Load Sharing in Redundant Connections to Fast Ethernet  
Network  
➽
Note: The CRF connection attribute can be set from the console.  
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Technical Background  
For each CRF with a translational link, spanning tree should be enabled. For SRT  
CRF, the default STP algorithm is IEEE 802.1D. Only this spanning tree algorithm  
can be used for translational links.  
A translational link has its own LAN segment number and recognizes source  
routing. However, the translational link is an element of a transparent network and  
frames are passed through only in the forwarding state. This restriction applies to  
all frames, including ARE and specifically-routed frames.  
Only one link of a CRF at a time may become forwarding. To achieve this, the  
spanning tree costs of the internal BRF-to-CRF link will be modified according to  
the CRF connection attribute. The BRF-to-CRF link is a virtual internal link and  
exists only for spanning tree purposes. The spanning tree cost of each primary  
connection remains unmodified.  
Note that in the Secondary 1 and Secondary 2 connections, different values are  
added to the cost of the internal BRF-to-CRF link to ensure that, when the Primary  
fails, the Secondary 1 will become forwarding the Secondary 2.  
Cost modification of BRF-to-CRF link:  
•
•
For the Secondary 1 connection, the cost of the internal BRF-to-CRF link is  
increased by 20,000.  
For the Secondary 2 connection, the cost of the internal BRF-to-CRF link is  
increased by 40,000.  
In Figure 11, the SmartStack TR Switch 2 and Ethernet switch 2 know that the root  
path cost seen from the secondary link is 20,000 higher than the root path cost of  
the primary link seen by the TR.  
With TR switch 1 and Ethernet switch 1. The secondary link will be blocked on the  
internal CRF-to-BRF link.  
To configure spanning-tree costs for a backup connection to Ethernet manually, set  
each connection attribute to Primary and then change spanning-tree costs on each  
side of the backup link.  
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Figure 11. STP Cost Modification  
In Figure 11, TR Switch 2 and Ethernet Switch 2 know that the cost of the  
Secondary link is 20,000 higher than the cost of the primary link seen by TR Switch  
1 and Ethernet Switch 1. This means that the secondary link will be blocked on one  
of its ends.  
To manually configure spanning-tree costs for a backup connection to the Ethernet,  
set each connection attribute to Primary and then change the spanning-tree costs  
must be changed on each side of the backup link.  
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General Guidelines  
This section describes guidelines for work within the console menus.  
•
•
To select a menu item, use the arrow keys to highlight it, then press ENTER.  
If you need to specify additional information for any item (for example,  
selecting Yes or No or supplying a value), a prompt appears on the screen. If  
you want to exit the prompt without changing the value, press ESC.  
•
•
In most cases, new values are saved when you select Return.  
Item More means there is more information than what is displayed on that  
screen.  
•
•
Selecting More and pressing ENTER displays the next screen of information.  
If the screen is a one-screen display, selecting More will update the screen.  
Item Port refers to the number of a specific port on a SmartStack STS16-  
20RM.  
•
•
Item Index refers to the numerical order of a list.  
To return to the main menu from any screen within the menus, press CTRL-P.  
Note that any changes made to the screen are not saved. To return to the  
greeting screen, press CTRL-B from any screen.  
•
•
To refresh the console panel at any time, press CTRL-L.  
To clear all queued messages, press CTRL-D. The messages will still be in the  
message log.  
•
•
If you are administering switches in a stack, many of the console screens will  
prompt for a box number. To continue, enter the number of the box you want  
to administer. The box that you are connected to is highlighted.  
The console automatically returns to the greeting screen after a default time of  
five minutes of inactivity. The time can be changed at the Console  
Configuration screen. The Console Configuration screen opens from the  
Configuration menu that is accessed from the main menu.  
•
For protection against inadvertent or unauthorized access to the configuration  
screens, you can establish a password to be entered at the greeting screen. If no  
password is configured, just press ENTER and the main menu is presented.  
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Navigating Within the Menus  
Use the arrow keys (cursor keys) to highlight a selection. If the selection is a menu,  
pressing the ENTER key displays a new screen of information; if the selection is a  
command, such as Reset, pressing the ENTER key initiates that function.  
A heading with an ellipsis (three dots) after it means that when that heading is  
selected, a submenu or screen is displayed.  
Unless specified differently, all the screens or menus are accessed in the same way.  
See the example in Figure 12:  
Figure 12. Main Switch Menu  
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Configuration Overview  
Execute the following general steps to configure a SSIM-H2-02:  
•
•
•
•
Determine which VLANs the TS ports should connect.  
Determine which VLAN, if any, should be untagged.  
Configure the TS VLAN ID for all the BRFs that should be tagged.  
Make sure that each TS VLAN ID matches that of the TS equipment at the  
other end.  
•
•
Assign CRFs to the TS port, thereby creating one virtual port in each VLAN.  
Optional: create new CRFs to make sure that the CRFs do not have conflicting  
ring numbers, as discussed in the “Ring Number Restriction” on page 15.  
Configure the virtual ports, in particular the tagging mode. The relevant  
configuration menus are described in detail in the following sections.  
•
•
Configure the translational bridging parameters for each Virtual Port.  
Assign CRFs to the TS port, thereby creating one virtual port in each VLAN.  
You may want to create new CRFs to ensure that the CRFs do not have  
conflicting ring numbers (see “Ring Number Restriction” on page 15).  
Remember that each CRF ring number must be set manually if automatic ring  
number learning is impossible.  
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VLAN Configuration  
For general information about the configuration of VLANs, refer to the SmartStack  
STS16-20RM/STS16-20FRM Token Ring Switch Installation and User Guide. Only  
issues relating to the configuration of TS ports are described here.  
BRF Configuration  
Additional parameter 802.1Q VLAN ID has been added to the BRF configuration:  
The 802.1Q VLAN ID is the value that is inserted in the IEEE 802.1Q frame tags.  
It is entered as a decimal value between 1 and 4094.  
The 802.1Q VLAN ID should not be confused with the existing VLAN ID, which  
is a number chosen by the user and used by the Token Ring switch to index CRFs  
and BRFs. By default, the 802.1Q VLAN ID is set to the same value as the VLAN  
ID.  
Local VLAN Port Configuration  
The TS ports will appear as trunk ports in the Local VLAN Port Configuration.  
This means that more than one CRF can be assigned to the TS ports. Note, however,  
the virtual port restriction described on page 15.  
Port Configuration - TS Ports  
To configure a TS port on the SSIM-H2-02, select Port Configuration from the  
Configuration menu and enter the port number of the TS port (21, 22, 25 or 26).  
Enabled  
Sets the administrative state of the port, possible values are Yes and No. When the  
port is disabled, the LINK LED is off.  
Default: Yes  
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Status  
Display only. Shows the current status of the port.  
Value  
Down  
Meaning  
The port is down.  
Going Up  
The port is enabled a protocol connection is being auto-  
negotiated.  
Up  
The port is up.  
Table 4. Translational Switch Physical Port Status  
Address Demand Aging Level  
Sets the threshold on the number of entries in the address table on which entries are  
aged faster. Possible values are 50, 60, 70, 80, and 90 percent and Disabled.  
Default: 90 percent  
Trace Mask  
Sets a bit mask for which messages are logged in the message log. Used mainly by  
Cabletron Systems support for debugging purposes.  
Virtual Port Configuration  
To configure a virtual port on a TS port, select Virtual Port Configuration on the  
Port Configuration menu of the TS port. If the TS port has more than one virtual  
port, a list of the corresponding CRFs appears from which the virtual port must be  
selected. The following menu options are available:  
Enabled  
Sets the administrative state of the virtual port to Yes or No.  
Default: Yes  
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Status  
Display only. Shows the current status of the virtual port.  
Value  
Admin down  
Meaning  
The port or virtual port is disabled.  
Waiting for port up  
The virtual port is waiting for the port to  
come up.  
Up  
The virtual port is up but not  
forwarding.  
Forwarding  
The virtual port is up and forwarding.  
Temporary down  
The virtual port is currently down,  
because the port is temporarily down.  
Table 5. Translational Switch Virtual Port Status  
MTU  
You can use only one value as MTU.  
MTU configured  
1500  
Actual TS frame size  
1558  
LF bits  
001  
Table 6. Translational Switch Configured and Actual Frame SIze  
Default: 1500  
Max Broadcast Rate (frames/sec)  
Sets the maximum broadcast frame rate; possible values are 0 to 5000 frames/sec  
or Disabled. If enabled, this will limit the amount of broadcast frames being  
forwarded from the TS side of the virtual port to the switch.  
Default: Disabled  
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VLAN Tagging Mode  
Sets the VLAN tagging mode of the virtual port; possible values are Tagged and  
Untagged. As explained previously, only one virtual port on each TS port can be  
untagged. All other virtual ports must be tagged and the 802.1Q VLAN ID must be  
the same in both ends.  
Because VLAN tagging mode imposes a small overhead, the VLAN that is  
expected to have the largest amount of traffic should be untagged.  
Default: Untagged for the first virtual port and Tagged for the subsequent ports.  
FC Modification  
Enabled FC modification preserves frame priority during translation between  
Ethernet and Token Ring (both directions). Possible values are Enabled and  
Disabled. As discussed earlier, a VLAN frame tag also contains a 3-bit priority  
field. If FC modification is enabled, the Token Ring frame priority in the FC byte  
is set to the frame tag priority. If FC modification is disabled, the FC priority is set  
to 0, and the frame tag priority is discarded.  
When the SSIM-H2-02 inserts a frame tag in a frame, and FC modification is  
enabled, the SmartStack SSIM-H2-02 module uses the FC priority from the Token  
Ring frame. Otherwise the frame tag priority is set to 0 and the FC priority is  
discarded.  
Default: Disabled  
Address Aging Time  
Sets the aging time for addresses and RIFs learned on an TS port. Possible value  
are 1 to 9999 minutes or 0 to disable aging. When there has been no activity on an  
address it is deleted from the address table.  
For an address using the RIF entry, when no frames with the RIF have been  
received for the specified period of time, the RIF and address entry is deleted. Only  
for address entries known from the host is the status of the address changed to RIF  
unknown.  
Default: 5 minutes  
RIF Not Learn Interval  
Sets the learning blocked interval for RIF entries. Possible values are 0 to 900  
seconds. A new RIF cannot be learned unless a specified period of time has passed  
since the activity on current RIF entry was seen.  
Default: 20 seconds  
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Explorer RIF Aging Time  
On output, the Translational Switch UEM quickly deletes addresses known only  
from forwarded explorer frames. The session starts with an explorer frame  
followed by a specifically routed frame. The explorer frame’s RIF aging time  
makes it possible to limit the number of known address and RIF entries to  
established sessions. Possible values are 0 to 900 seconds. A RIF with an address  
is removed after this time if a specifically routed frame does not follow the  
explorer.  
Default: 10 seconds  
Frame Conversion Configuration  
To configure frame conversion on a TS port, select Frame Conversion  
Configuration on the Virtual Port Configuration menu of the TS port.  
The following menu options are listed:  
— IP Conversion Status  
— IP conversion parameters change  
IP Conversion Status  
Display only. Shows the current status of the IP Conversion.  
Possible values are Enabled and Disabled.  
IP Conversion Parameters Change  
To change IP conversion parameters select IP conversion parameters change on  
the Frame Conversion Configuration menu of the TS port.  
IP Frames Conversion  
Sets the state of the IP frames Conversion. Possible values are Enabled and  
Disabled. If the state is set to Disabled IP, the traffic will be dropped.  
Default: Enabled  
IP: Token Ring Format  
Sets the format of IP frames on Token Ring.  
Format  
Meaning  
802.5 SNAP  
Frame in the IEEE 802.5 format with SNAP  
Table 7. IP: Token Ring Format  
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IP: Ethernet Format  
Sets the format of IP frames on Ethernet.  
Format  
Meaning  
802.3 SNAP  
Ethernet II  
Frame in the IEEE 802.3 format with SNAP  
Frame in Ethernet II format  
Table 8. IP: Ethernet Format  
Default: Ethernet II  
Source Routing  
Enables or disables Source Routing in IP frames transmitted to Token Ring.  
Value  
Meaning  
SR  
Source Routing information will be added to frames  
converted from Ethernet to Token Ring format.  
noSR  
Frame will be transmitted to Token Ring as a transparent  
frame.  
Table 9. IP: Source Routing  
Default: SR  
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Explorer Frames Type  
Sets the type of explorer that should be used for ARP/RARP traffic. From the set  
of IP protocols explorer frame type can be chosen only for ARP/RARP frames.  
Other IP protocols can generate only STE explorer.  
Value  
Meaning  
ARE  
STE  
The All Routes Explorer should be used.  
Spanning Tree Explorer should be used.  
Table 10. IP: Explorer Frames Type  
Value  
Meaning  
ARE  
STE  
Use All Routes Explorer.  
Use Spanning Tree Explorer.  
Table 11. IP: Explorer Frames Type  
Default: STE (change to ARE for typical Token Ring behavior for ARP frames)  
Enable IP Fragmentation  
Enables or disables fragmentation of IP frames received from Token Ring and  
transmitted to Ethernet. The possible values are Enabled and Disabled.  
Default: Enabled  
TR MAC Address for IP Multicasts  
Allows entering the IP multicast address. The address is entered in the MAC  
address format.  
Default: C00000:040000  
Novell Conversion Status  
Display only. Shows the current status of the Novell Conversion.  
Possible values are Enabled and Disabled.  
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Novell Conversion Parameters Change  
To change Novell conversion parameters select NOVELL conversion  
parameters change on the Frame Conversion Configuration menu of the TS  
port.  
NOVELL Frames Conversion  
Determines how Novell frames are converted. Possible values are Enabled and  
Disabled. If the state is set to Disabled Novell traffic will be dropped.  
Default: Enabled  
NOVELL: Token Ring Format  
Sets the format of Novell frames on Token Ring.  
Format  
Meaning  
Novell Naming Conventions  
802.5 SNAP  
Frame in the IEEE 802.5 Token Ring SNAP  
format with SNAP  
802.5  
Frame in the IEEE 802.5 Token Ring  
format without SNAP  
Table 12. NOVELL: Token Ring Format  
Default: 802.5  
NOVELL: Ethernet Format  
Sets the format of Novell frames on Ethernet.  
Novell Naming  
Conventions  
Format  
802.3  
Meaning  
Frame in the IEEE 802.2  
format.  
802.2  
Novell 802.3  
802.3 SNAP  
Ethernet II  
Frame in the IEEE 802.3  
format.  
Normal 802.3  
Frame in the IEEE 802.3  
format with SNAP.  
Ethernet SNAP  
Frame in Ethernet II format. Ethernet II  
Table 13. NOVELL: Ethernet Format  
Default: 802.3  
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Source Routing  
Enables or disables Source Routing in Novell frames transmitted to Token Ring.  
Value  
Meaning  
SR  
Source Routing information will be added to frames  
converted from Ethernet to Token Ring format.  
noSR  
Frame will be transmitted to Token Ring as a transparent  
frame.  
Table 14. NOVELL: Source Routing  
Default: noSR  
Explorer Frames Type  
Sets the type of explorer for IPX traffic.  
Value  
Meaning  
ARE  
STE  
Use All Routes Explorer.  
Use Spanning Tree Explorer.  
Table 15. Novell: Explorer Frames Type  
Default: STE  
IPX Address Translation  
Enables and disables reversing MAC address bits in Novell frames.  
Possible values are do not bit reverse and bit reversed.  
Default: do not bit reverse  
NetBios Conversion Status  
Display only. Shows the current status of the NetBios Conversion.  
Possible values are Enabled and Disabled.  
NetBios Conversion Parameters Change  
To change NetBios conversion parameters select NetBios conversion parameters  
change on the Frame Conversion Configuration menu of the TS port.  
NetBios Frames Conversion  
Determines how NetBios frames are converted. Possible values are Enabled and  
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Disabled. If the state is set to Disabled, NetBios traffic will be dropped.  
Default: Enabled  
NetBios: Token Ring Format  
Sets the format of NetBios frames on Token Ring.  
Format  
802.5  
Meaning  
Frame in the IEEE 802.5 format.  
Table 16. NetBios: Token Ring Format  
NetBios: Ethernet Format  
Sets the format of NetBios frames on Ethernet.  
Format  
Meaning  
802.3  
Ethernet II  
Frame in the IEEE 802.3 format.  
Frame in Ethernet II format.  
Table 17. NetBios: Ethernet Format  
Default: 802.3  
Source Routing  
Enables or disables Source Routing in NetBios frames transmitted to Token Ring.  
Value  
Meaning  
SR  
Source Routing information will be added to frames  
converted from Ethernet to Token Ring format.  
noSR  
Frame will be transmitted to Token Ring as a transparent  
frame.  
Table 18. NetBios: Source Routing  
Default: SR  
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Explorer Frames Type  
Sets the type of explorer that should be used for NetBios traffic.  
Value  
Meaning  
ARE  
STE  
Use All Routes Explorer.  
Use Spanning Tree Explorer.  
Table 19. NetBios: Explorer Frames Type  
Default: STE  
TR Functional Address  
The TR Functional Address is entered in the MAC address format.  
Default: C00000:000080  
Ethernet Group Address  
The Ethernet Group Address is entered in the MAC address format.  
Default: 030000:000001  
SNA Conversion Status  
Display only. Shows the current status of the SNA Conversion.  
Possible values: Enabled and Disabled.  
SNA Conversion Parameters Change  
To change SNA conversion parameters select SNA conversion parameters  
change on the Frame Conversion Configuration menu of the TS port.  
SNA Frames Conversion  
Sets the state of the SNA Frames Conversion. Possible values are Enabled and  
Disabled. If the state is set to Disabled, SNA traffic will be dropped.  
Default: Enabled  
SNA: Token Ring Format  
Sets the format of SNA frames on Token Ring.  
Format  
802.5  
Meaning  
Frame in the IEEE 802.5 format.  
Table 20. SNA: Token Ring Format  
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SNA: Ethernet Format  
Sets the format of SNA frames on Ethernet.  
Format  
Meaning  
802.3  
Ethernet II  
Frame in the IEEE 802.3 format.  
Frame in Ethernet II format.  
Table 21. SNA: Ethernet Format  
Default: 802.3  
Source Routing  
Enables or disables Source Routing in SNA frames transmitted to Token Ring.  
Value  
Meaning  
SR  
Source Routing information will be added to frames  
converted from Ethernet to Token Ring format.  
noSR  
Frame will be transmitted to Token Ring as a transparent  
frame.  
Table 22. SNA: Source Routing  
Default: SR  
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Explorer Frames Type  
Sets the type of explorer that should be used for SNA traffic.  
Value  
Meaning  
ARE  
STE  
Use All Routes Explorer.  
Use Spanning Tree Explorer.  
Table 23. SNA: Explorer Frames Type  
Default: ARE  
Other Frames w/SNAP Conversion Status  
Display only. Shows the current status of the Other Frames With SNAP  
Conversion. Possible values are Enabled and Disabled.  
Other Frames w/SNAP Conversion Parameters Change  
To change Other Frames w/SNAP conversion parameters select Other Frames w/  
SNAP conversion parameters change on the Frame Conversion Configuration  
menu of the TS port.  
Other Frames w/SNAP Frames Conversion  
Sets the state of the Other Frames w/SNAP Frames Conversion. Possible values are  
Enabled and Disabled. If the state is set to Disabled, Other Frames w/SNAP traffic  
will be dropped.  
Default: Enabled  
Other Frames w/SNAP: Token Ring Format  
Sets the format of Other Frames w/SNAP frames on Token Ring.  
Format  
Meaning  
802.5 SNAP  
Frame in the IEEE 802.5 format with SNAP  
Table 24. Other Frames w/SNAP: Token Ring Format  
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Other Frames w/SNAP: Ethernet Format  
Sets the format of Other Frames w/SNAP frames on Ethernet.  
Formats available:  
Format  
Meaning  
802.3 SNAP  
Ethernet II  
Frame in the IEEE 802.3 format with SNAP  
Frame in Ethernet II format  
Table 25. Other Frames w/SNAP: Ethernet Format  
Default: Ethernet II  
Source Routing  
Enables or disables Source Routing in Other Frames w/SNAP frames transmitted  
to Token Ring.  
Value  
Meaning  
SR  
Source Routing information will be added to frames  
converted from Ethernet to Token Ring format.  
noSR  
Frame will be transmitted to Token Ring as a  
transparent frame.  
Table 26. Other Frames w/SNAP: Source Routing  
Default: SR  
Explorer Frames Type  
Sets the type of explorer that should be used for Other Frames w/SNAP traffic.  
Value  
Meaning  
ARE  
STE  
Use All Routes Explorer.  
Use Spanning Tree Explorer.  
Table 27. Other Frames w/SNAP: Explorer Frames Type  
Default: ARE  
Other Frames w/o SNAP Conversion Status  
Display only. Shows the current status of the Other Frames Without SNAP  
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Conversion. Possible values are Enabled and Disabled.  
Other Frames w/o SNAP Conversion Parameters Change  
To change Other Frames w/o SNAP conversion parameters select Other Frames  
w/o SNAP conversion parameters change on the Frame Conversion  
Configuration menu of the TS port. The following menu options are listed:  
Other Frames w/o SNAP Frames Conversion  
Sets the state of the Other Frames w/o SNAP frames Conversion. Possible values  
are Enabled and Disabled. If the state is set to Disabled, Other Frames w/o SNAP  
traffic will be dropped.  
Default: Enabled  
Other Frames w/o SNAP: Token Ring Format  
Sets the format of Other Frames w/o SNAP frames on Token Ring.  
Format  
802.5  
Meaning  
Frame in the IEEE 802.5 format.  
Table 28. Other Frames w/o SNAP: Token Ring Format  
Other Frames w/o SNAP: Ethernet Format  
Sets the format of Other Frames w/o SNAP frames on Ethernet.  
Format  
802.3  
Meaning  
Frame in the IEEE 802.3 format.  
Table 29. Other Frames w/o SNAP: Ethernet Format  
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Source Routing  
Enables or disables Source Routing in Other Frames w/o SNAP frames transmitted  
to Token Ring.  
Value  
Meaning  
SR  
Source Routing information will be added to frames  
converted from Ethernet to Token Ring format.  
noSR  
Frame will be transmitted to Token Ring as a transparent  
frame.  
Table 30. Other Frames w/o SNAP: Source Routing  
Default: SR  
Explorer Frames Type  
Sets the type of explorer that should be used for Other Frames w/o SNAP traffic.  
Value  
Meaning  
ARE  
STE  
Use All Routes Explorer.  
Use Spanning Tree Explorer.  
Table 31. Other Frames w/o SNAP: Explorer Frames Type  
Default: STE  
Dual Home FEP Addresses Configuration  
To configure Dual Home FEP Addresses on a TS port, select Dual Home FEP  
Addresses Configuration on the Virtual Port Configuration menu of the TS  
port. For each Virtual Port (on each TS port), 10 addresses can be configured as  
Dual Home FEP addresses. A constant list of 10 MAC addresses numbered 1-10 is  
shown when this menu is opened. Addresses which consist entirely of zeros  
represent empty entries.  
To add or change an address, highlight the address, press ENTER, and then either  
enter the new MAC address or simply press ENTER once more to enter a NULL  
address (empty entry).  
➽
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4. Statistics  
A wide range of statistics is available for the SmartStack Token-Ring Switch. The  
following topics are discussed in this chapter:  
•
•
•
•
•
•
•
•
•
Port Status  
Port Statistics  
General Statistics  
Discarded Frames  
802.3 Statistics  
Traffic Counters  
Error Counters  
Virtual Port Statistics  
Discarded Frames Statistics  
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Statistics Menu  
When Statistics is selected from the main menu, the following options are listed:  
— Switch Statistics  
— Power Supply Information  
— Port Status  
— Port Statistics  
— Address Tables  
— Current Spanning Tree Information  
— VLAN Statistics  
— Diagnostic Test Results  
— Message Log Information  
— Display Summary  
The menu items in the Statistics menu are all described in the guide for the  
SmartStack Token Ring Switches. For general information about these menu items,  
refer to that guide.  
However, some of the menu items contain additional information that is specific for  
the SSIM-H2-02:  
•
•
•
•
Port Status - The module virtual ports are included in the port overview.  
Port Statistics - contains additional counters for TS ports.  
Address Tables - also contains addresses learned from TS ports.  
Message Log Information - also contains messages generated by the module.  
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Port Status  
Besides the ordinary Token-Ring ports, the table contains an entry for each TS  
virtual port, along with its current status.  
When Port Status is selected on the Statistics menu, the following items are  
displayed:  
Port  
The TS port for which the virtual port is defined. Possible values are: 21, 22, 25,  
and 26.  
TrCRF  
The name of the CRF in which the virtual port is defined.  
TrBRF  
The name of the BRF in which the virtual port is defined.  
Enabled/Ins  
For ordinary Token Ring ports, this is the enabled and inserted status. This does not  
apply to virtual ports on a TS port. Instead, the current state of the virtual port is  
displayed. For details, refer to the description of virtual port configuration.  
Spd  
The connect speed in Mbps, which is displayed as 10 or 100 for TS module virtual  
ports. Note that 100 Mbps full-duplex is the total bandwidth available on a TS port  
and is shared by all the virtual ports on that port. The actual bandwidth on a  
particular virtual port depends on the amount of traffic on other virtual ports.  
Oper Mode  
The operation mode is for TS virtual ports may be displayed as HDX (Half DupleX)  
or FDX (Full DupleX).  
Fwd Mode  
The forwarding mode is always displayed as Store-Fwd, since the SSIM-H2-02  
always operates in the store-and-forward switching mode.  
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Port Statistics  
When Port Statistics is selected and the port number of a TS port is entered, the  
following options are listed:  
— General Statistics  
— 802.3 Statistics  
— Virtual Port Statistics  
The available information is discussed in the following sections.  
General Statistics  
When General Statistics is selected on the Port Statistics, the screen shows the  
number of frames and bytes received, forwarded and transmitted on the TS port.  
These numbers include traffic for all virtual ports. The screen is automatically  
updated every five seconds.  
Frame and Byte Counters  
The following frame and byte counters are defined:  
Received  
Frames received from TS, but not necessarily forwarded.  
Forwarded  
Frames received from TS and forwarded to other ports in the switch.  
Transmitted  
Frames transmitted to TS.  
Frames  
The number of frames received, forwarded or transmitted. The number is  
subdivided into the NSR, SRF, STE and ARE frames, as explained on page 49. For  
received frames it is also subdivided into unicast, broadcast and multicast frames,  
explained on page 49.  
Bytes  
The total number of bytes in frames. The byte count includes all bytes from AC up  
to and including the FCS field. Note that the forwarded byte count can be lower  
than the received byte count even though all frames are forwarded. This is because  
the VLAN frame tag is removed before a frame is forwarded.  
NSR Frames  
Number of Non-Source Routed frames.  
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SRF Frames  
Number of Specifically Routed Frames.  
STE Frames  
Number of Spanning Tree Explorers.  
ARE Frames  
Number of All-Routes Explorers.  
Unicast Frames  
Number of frames with a unicast MAC address as destination.  
Broadcast Frames  
Number of frames with a Token-Ring broadcast address as destination.  
Multicast Frames  
Number of frames with a Token-Ring functional or group address as destination.  
Reset  
When you choose Reset, the counters for frames, bytes and discarded frames are  
reset. The time since last reset is shown on the screen.  
Discarded Frames  
When Discarded Frames is chosen on the general statistics display, the screen  
shows the number of frames discarded on the TS port in both inbound (from TS)  
and outbound (to TS) directions. The discard reasons are described below.  
Discarded Inbound Frames  
The following discard reasons are defined for inbound frames:  
Invalid VLAN  
A frame was received on an unknown VLAN. This is either a VLAN tagged frame  
containing an unknown VLAN ID, or an untagged frame when no untagged virtual  
ports are defined. Make sure that the 802.1Q VLAN ID and virtual port tagging  
mode is set to the same value on both sides of the connection.  
Table Invalid VLAN Tag CFI  
A VLAN tagged frame with an invalid Canonical Format Indicator (CFI) was  
received. The CFI is a bit in the Tag Control Information field of a VLAN tag. This  
bit indicates the bit order of any MAC addresses in the information field. It is 0 for  
Ethernet format and 1 for Token-Ring format. It should always be 1 in received  
frames.  
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Table Filtered by Address Filter  
The frame by discarded because of a MAC address filter.  
Table Filtered by DSAP Filter  
The frame by discarded because of a protocol (DSAP or protocol type) filter.  
Locally Filtered  
The frame is destined to the local (connect to the Ethernet segment) station.  
Table Blocked Virtual Port  
The frame is discarded because the virtual port is currently not in forwarding state.  
Unrecognized SNA  
Number of unrecognized SNA frames.  
Discarded Outbound Frames  
The following discard reasons are defined for outbound frames:  
Table Invalid Frame Header Tag  
A frame could not be transmitted because it has an invalid internal frame header tag  
(note that this internal frame header tag is not the same thing as the VLAN tag).  
Table Blocked Virtual Port  
The frame is not transmitted because the virtual port is currently not in forwarding  
state.  
Table Filtered by DSAP Filter  
The frame is not transmitted because of a protocol (DSAP or protocol type) filter.  
Table Frame Too Large  
The frame is larger than the maximum frame size, which has been configured for  
the virtual port. Refer to the “Virtual Port Configuration” on page 29.  
Broadcast Overflow  
Number of broadcast frames dropped because the ring number was exceeded.  
Learning Fails  
(TS ports only.) Incremented if address learning from received Token Ring frames  
fails. Possible reasons:  
•
Translational Switch received frame with damaged RIF  
(wrong length, bad ring).  
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•
•
Translational Switch received frame with RIF but, for this protocol, the noSR  
flag is used during conversions. If you have the default configuration this can  
happen for IPX frames (clear and set flag useSR for Novell conversion  
parameters to see if this is the reason).  
For the CRF in which the Translational Switch port exists, the ring number is  
set to Auto but it is impossible to learn the proper ring number.  
802.3 Statistics  
From a port popup menu select TS Port Statistics | 802.3 Statistics to access this  
dialog box. The dialog box displays IEEE 802.3 traffic and error counters for the  
selected port. All counters are retrieved from a physical layer of the uplink and  
automatically updated every 5 seconds.  
Traffic Counters  
Bytes Received  
Number of bytes received on this port.  
Bytes Transmitted  
Number of bytes transmitted by this port.  
Frames Received  
Number of frames received on this port.  
Frames Transmitted  
Number of frames transmitted by this port.  
Multicast Bytes Received  
Number of bytes in multicast frames received on this port.  
Multicast Frames Received  
Number of multicast frames received on this port without errors.  
Frames Transmitted, Deferred  
Number of frames transmitted by this port but initially deferred. (The 21143 FE  
transceiver had to defer while ready to transmit a frame because the carrier was  
asserted).  
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Error Counters  
Single Collisions  
Number of frames transmitted by this port after single collision.  
Multiple Collisions  
Number of frames transmitted by this port after multiple collision.  
Excessive Collisions  
Number of frames dropped because of excessive collisions.  
Carrier Check Failures  
Number of frames dropped because of late collision and loss of carrier.  
Short Circuits  
Number of frames dropped because of short circuits.  
Open Circuits  
Number of frames dropped because of open circuits.  
Remote Failures  
Number of frames dropped because of remote failures.  
CRC Errors  
Number of frames received on this port with CRC error.  
Framing Errors  
Number of frames dropped because of framing error.  
Frames Too Long  
Number of received frames longer than the maximum length receivable.  
Data Overrun  
Number of frames dropped because of data overrun.  
System Buffers Unavailable  
Number of frames dropped because of lack of system received buffers.  
User Buffers Unavailable  
Number of tries of buffer allocation.  
Frames Congested  
Number of frames congested, due to a lack of space in Tx queue.  
SSIM-H2-02 Fast Ethernet - Translational Switch SmartStack Interface Module Installation and User Guide  
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53  
Virtual Port Statistics  
When Virtual Port Statistics is selected from the Port Statistics menu for a TS  
port, counters for the virtual port are displayed. If more than one virtual port is  
defined for the TS port, the requested virtual port must first be selected from a list  
of CRFs.  
The following items are displayed:  
Virtual Port State  
This is the current state of the virtual port. Refer to the “Virtual Port Configuration”  
on page 33 for details.  
Frames Forwarded  
The number of frames received and forwarded on this virtual port.  
Frames Transmitted  
The number of frame transmitted on this virtual port.  
Frames Received  
The number of frames received but not necessarily forwarded on this virtual port.  
Reset  
The time since these counters were last restarted. Select Reset to reset the counters  
on this screen.  
Discarded Frames Statistics  
When Disc Frames (in) or Disc Frames (out) is selected from the Virtual Port  
Statistics menu, counters of discarded frames are displayed. Depending on which  
option was chosen (in or out), inbound or outbound statistics are displayed.  
Inbound (No Translation)  
TCP/IP  
Number of frames dropped because TCP/IP translation is disabled or inbound  
frames are received from Ethernet in a format different than that specified in the TS  
configuration dialog.  
IPX  
Number of frames dropped because IPX translation is disabled or inbound frames  
are received from Ethernet in a format different than that specified in the TS  
configuration dialog.  
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54  
NetBios  
Number of frames dropped because NetBios translation is disabled or inbound  
frames are received from Ethernet in a format different than that specified in the TS  
configuration dialog.  
SNA  
Number of frames dropped because SNA translation is disabled or inbound frames  
are received from Ethernet in a format different than that specified in the TS  
configuration dialog.  
Other w/SNAP  
Number of frames dropped because this translation is disabled or inbound frames  
are received from Ethernet in a format different than that specified in the TS  
configuration dialog.  
Other w/o SNAP  
Number of frames dropped because this translation is disabled.  
Inbound Translation errors  
TCP/IP  
Number of frames dropped because of TCP/IP translation errors.  
IPX  
Number of frames dropped because of IPX translation errors.  
NetBios  
Number of frames dropped because of NetBios translation errors.  
SNA  
Number of frames dropped because of SNA translation errors.  
Other w/SNAP  
Number of frames dropped because of translation errors for other frames with  
SNAP.  
Other w/o SNAP  
Number of frames dropped because of translation errors for other frames without  
SNAP.  
SSIM-H2-02 Fast Ethernet - Translational Switch SmartStack Interface Module Installation and User Guide  
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55  
Outbound (No Translation)  
TCP/IP  
Number of frames dropped because TCP/IP translation is disabled.  
IPX  
Number of frames dropped because IPX translation is disabled or outbound frames  
received from Token Ring in format different than specified in TS configuration  
dialog.  
NetBios  
Number of frames dropped because NetBios translation is disabled.  
SNA  
Number of frames dropped because SNA translation is disabled.  
Other w/SNAP  
Number of frames dropped because translation is disabled for other frames with  
SNAP.  
Other w/o SNAP  
Number of frames dropped because translation is disabled for other frames without  
SNAP.  
Outbound Translation Errors  
TCP/IP  
Number of frames dropped because of TCP/IP translation errors.  
IPX  
Number of frames dropped because of IPX translation errors.  
NetBios  
Number of frames dropped because of NetBios translation errors.  
SNA  
Number of frames dropped because of SNA translation errors.  
Other w/SNAP  
Number of frames dropped because of translation errors for other frames with  
SNAP.  
SSIM-H2-02 Fast Ethernet - Translational Switch SmartStack Interface Module Installation and User Guide  
Statistics  
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56  
Generic w/o SNAP  
Number of frames dropped because of translation errors for generic frames without  
SNAP.  
Fragmentation Error  
(TCP/IP only.) Number of frames dropped because IP fragmentation finished with  
an error or an IP frame was received with the Don't Fragment bit set.  
➽
SSIM-H2-02 Fast Ethernet - Translational Switch SmartStack Interface Module Installation and User Guide  
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57  
5. Getting in Touch with Technical  
Support  
For additional support related to this device or document, contact Cabletron  
Systems using one of the following methods:  
World Wide Web  
Phone  
http://www.cabletron.com/  
(603) 332-9400  
Internet mail  
[email protected]  
FTP  
ftp://ftp.cabletron.com/  
anonymous  
Login  
Password  
your email address  
To send comments or suggestions concerning this document, contact the  
Cabletron Systems Technical Writing Department via the following  
email address: [email protected]  
Make sure to include the document Part Number in the email message.  
Before calling Cabletron Systems, have the following information ready:  
•
•
•
Your Cabletron Systems service contract number  
A description of the failure  
A description of any action(s) already taken to resolve the problem (e.g.,  
changing mode switches, rebooting the unit, etc.)  
•
The serial and revision numbers of all involved Cabletron Systems products in  
the network  
•
•
•
A description of your network environment (layout, cable type, etc.)  
Network load and frame size at the time of trouble (if known)  
The device history (i.e., have you returned the device before, is this a recurring  
problem, etc.)  
•
Any previous Return Material Authorization (RMA) numbers  
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58  
SSIM-H2-02 Fast Ethernet - Translational Switch SmartStack Interface Module Installation and User GuideGetting in Touch with Technical Support  
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59  
Appendix A. Abbreviations  
AC  
Access Control  
ARE  
ATM  
BRF  
CFI  
All-Routes Explorer  
Asynchronous Transfer Mode  
Bridge Relay Function  
Canonical Format Indicator  
Cyclic Redundancy Check  
Concentrator Relay Function  
Destination Address  
Destination SAP  
CRC  
CRF  
DA  
DSAP  
DTR  
ECO  
FC  
Dedicated Token-Ring  
Engineering Check Order  
Frame Control  
FCS  
Frame Check Sequence  
Full Duplex  
FDX  
HDX  
HSTR  
IP  
Half Duplex  
High-Speed Token-Ring  
Internet Protocol  
LAN  
LED  
LLC  
MAC  
Mbps  
MMF  
MTU  
NSR  
NVRAM  
RAM  
Local Area Network  
Light Emitting Diode  
Logical Link Control  
Media Access Control  
MegaBit Per Second  
Multi Mode Fiber  
Maximum Transmission Unit  
Non-Source Routed  
Non-Volatile RAM  
Random Access Memory  
SSIM-H2-02 Fast Ethernet - Translational Switch SmartStack Interface Module Installation and User Guide  
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60  
RIF  
Route Information Field  
Receive Data  
RX  
SA  
Source Address  
SAP  
SNA  
SNAP  
SNMP  
SR  
Service Access Point  
Systems Network Architecture  
Sub-Network Access Protocol  
Simple Network Management Protocol  
Source Routing  
SRB  
SRF  
SRS  
SRT  
SSAP  
SSIM  
STE  
TS  
Source Route Bridging  
Specifically Routed Frame  
Source Route Switching  
Source Route Transparent  
Source SAP  
SmartStack Interface Module  
Spanning Tree Explorer  
Translational Switch  
Tag Control Information  
Trivial File Transfer Protocol  
Token-Ring  
TCI  
TFTP  
TR  
TX  
Transmit Data  
TXI  
UTP  
VLAN  
Transmit Immediate  
Unshielded Twisted Pair  
Virtual LAN  
➽
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index-1  
Index  
A
I
abbreviations 59  
Installation  
software 8  
installation  
physical 7  
procedure 6  
introduction 1  
B
Bridging Modes 16  
Source Routed Bridging (SRB) 17  
Source Routed Switching (SRC) 16  
Source Routed Transparent Bridging (SRT) 16  
L
LEDs 10  
C
cabling 10  
configuration 12  
N
default 12  
network scenarios  
console configuration 13  
configuration overview 27  
general guidelines 25  
introduction 14  
navigating within the menus 26  
ports, port groups and VLANs 14  
ring number restriction 15  
TS virtual ports and VLAN tagging 15  
virtual port restriction 15  
CrossFire 8660 module  
configuration 27  
frame duplication 18  
frame looping 19  
P
package contents 5  
port configuration - TS ports 28  
power-on self test 11  
R
redundant connections to Fast Ethernet network 18  
redundant connections to fast ethernet network  
technical background 23  
connection 1  
installation 7  
software installation 8  
S
F
service 57  
frame conversion configuration 32  
dual home FEP addresses configuration 43  
NetBios conversion parameters change 36  
NetBios conversion status 36  
software installation 8  
software download 9  
TFTP download 8  
Source Routed Switching (SRS) 16  
Source Routed Transparent Bridging (SRB) 17  
Source Routed Transparent Bridging (SRT) 16  
Spanning Tree configuration 20  
statistics 45  
Novell conversion parameters change 35  
Novell Conversion Status 34  
other frames w/o SNAP conversion parameters  
change 42  
other frames w/o SNAP conversion status 41  
other frames w/SNAP conversion parameters  
change 40  
other frames w/SNAP conversion status 40  
SNA conversion parameters change 38  
SNA conversion status 38  
discarded frames 53  
general statistics 48  
menus 46  
port statistics 48  
port status 47  
virtual port statistics 53  
TCP/IP conversion parameters change 32  
TCP/IP conversion status 32  
frame duplication 18  
frame looping 19  
Index  
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index-2  
V
VLAN configuration 28  
BRF configuration 28  
local VLAN port configuration 28  
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* 710001816*  
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