C H A P T E R
1
Overview
This chapter describes the PA-4T port adapter and contains the following sections:
•
•
•
•
•
•
Port Adapter Overview
support full-duplex operation at T1 (1.544 Mbps) and E1 (2.048 Mbps) speeds. Each port supports any
of the available interface types: Electronics Industries Association/Telecommunications Industries
Association (EIA/TIA)-232, EIA/TIA-449, V.35, X.21, and EIA-530. The cable attached to each PA-4T
interface port determines its type (EIA/TIA-232, and so forth) and its mode (DCE or DTE).
Note
Although the VIP supports online insertion and removal (OIR), individual port adapters do not. To
replace port adapters, you must first remove the VIP from the chassis, and then replace port adapters as
required.
Cisco 7200 series routers support OIR of all port adapter types.
Figure 1-1
PA-4T—Faceplate View
FAST SERIAL
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Synchronous Serial Specifications
Synchronous Serial Specifications
The PA-4T provides up to four synchronous serial interfaces. Each interface allows a maximum
bandwidth of 2.048 Mbps; the speed depends on the type of electrical interface used. Use EIA/TIA-232
for speeds of 64 kilobits per second (kbps) and below, and use X.21, EIA/TIA-449, V.35, or EIA-530 for
higher speeds.
Serial signals can travel a limited distance at any given bit rate; generally, the slower the baud rate, the
greater the distance. All serial signals are subject to distance limits beyond which a signal degrades
significantly or is completely lost.
interface type. The recommended maximum rate for V.35 is 2,048 Mbps.
Table 1-1
Standards for Transm ission Speed Versus Distance
EIA/TIA-232
Distances
EIA/TIA-449, X.21, V.35, EIA-530
Distances
Rate (bps)
2400
Feet
200
100
50
Meters
Feet
Meters
1,250
625
312
156
78
60
30
15
7.6
3.7
2.6
–
4,100
2,050
1,025
513
4800
9600
19200
25
38400
12
256
56000
8.6
–
102
31
1544000 (T1)
50
15
Balanced drivers allow EIA/TIA-449 signals to travel greater distances than EIA/TIA-232. The
EIA-530. EIA/TIA-449 and EIA-530 support 2.048-Mbps rates, and V.35 supports 2.048-Mbps rates
without any problems; we do not recommend exceeding published specifications for transmission speed
versus distance. Do so at your own risk.
LEDs
The PA-4T contains the enabled LED, standard on all port adapters, and a one status LED for each port.
After system initialization, the enabled LED goes on to indicate that the PA-4T has been enabled for
Figure 1-2
LEDs on the PA-4T—Horizontal Orientation Show n
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Cables, Connectors, and Pinouts
The green enabled LED on the port adapter indicates that the motherboard is enabled and receiving
power, and that the port adapter is ready for operation.
The following conditions must be met before the enabled LED goes on:
•
•
The PA-4T interface is correctly connected and receiving power
The PA-4T-equipped card or router contains a valid microcode version that has been downloaded
successfully
•
The bus recognizes the PA-4T or PA-4T-equipped VIP
If any of these conditions is not met, or if the initialization fails for other reasons, the enabled LED does
not go on.
Table 1-2 lists LED colors and indications.
Table 1-2
PA-4T LEDs
DTE
DCE
LED Label
Function Function Color and Function
TD
Transmit Transmit Green
data out
data in
TC
Transmit Transmit Green
clock in
clock in
(TXCE)
RD
RC
Receive
data in
Receive Green
data out
Receive
clock in
Receive Green
clock
out
LB/CD
–
–
–
Green: DTR, DSR, RTS, CTS, or DCD active
Yellow: local loop or internal loop active
EN (enable)
–
Green: port adapter enabled
Cables, Connectors, and Pinouts
The following sections describe the serial receptacles on the PA-4T, and the cables and pinouts for the
various serial interface cables.
PA-4T Port Adapter Receptacles and Cables
The PA-4T and adapter cables allow a high density of interface ports, regardless of the size of the
connectors typically used with each electrical interface type. All ports use an identical 60-pin, D-shell
receptacle that supports all interface types: EIA/TIA-232, V.35, EIA/TIA-449, X.21, and EIA-530. Each
port requires a serial adapter cable, which provides the interface between the high-density serial port and
the standard connectors that are commonly used for each electrical interface type.
Note
The adapter cable determines the electrical interface type and mode of the port (DTE or DCE) to which
it is connected.
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Cables, Connectors, and Pinouts
The network end of the cable is an industry-standard connector for the type of electrical interface that
the cable supports. For most interface types, the adapter cable for DTE mode uses a plug at the network
end, and the cable for DCE mode uses a receptacle at the network end. Exceptions are V.35 adapter
cables, which are available with either a V.35 plug or a receptacle for either mode, and the EIA-530
adapter cable, which is available only in DTE mode with a DB-25 plug at the network end. The mode is
labeled on the molded plastic connector shell at the ends of all cables except V.35 (which uses the
standard Winchester block-type connector instead of a molded plastic D-shell).
Following are the available interface cable options (and product numbers) for the mode and network-end
connectors for each cable:
•
•
•
EIA/TIA-232: DTE mode with a DB-25 plug (CAB-232MT=); DCE mode with a DB-25 receptacle
(CAB-232FC=)
EIA/TIA-449: DTE mode with a 37-pin D-shell plug (CAB-449MT=); DCE mode with a 37-pin
D-shell receptacle (CAB-449C=)
V.35: DTE mode or DCE mode with a 34-pin Winchester-type V.35 plug (CAB-V35MT= or
CAB-V35MC=); DTE mode or DCE mode with a 34-pin Winchester-type V.35 receptacle
(CAB-V35FT= or CAB-V35FC=). Also available is a cable with a male DB-60 plug on the router
end and a male DB-34 shielded plug on the network end (CAB-V35MTS=).
•
•
X.21: DTE mode with a DB-15 plug (CAB-X21MT=); DCE mode with a DB-25 receptacle
(CAB-X21FC=)
EIA-530: DTE mode with a DB-25 plug (CAB-530MT=)
Note
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Cables, Connectors, and Pinouts
Figure 1-3
Serial Port Adapter Cables
(PA-4T port adapter)
Router connections
EIA/TIA-232
EIA/TIA-449
V.35
X.21
EIA-530
Network connections at the modem or CSU/DSU
Metric (M3) thumbscrews are included with each port adapter cable to allow connections to devices that
use metric hardware. Because the 4T port adapter uses a special, high-density port that requires special
adapter cables for each electrical interface type, we recommend that you obtain serial interface cables
from the factory.
EIA/TIA-232 Connections
The router (VIP) end of all EIA/TIA-232 adapter cables is a high-density 60-pin plug. The opposite
(network) end of the adapter cable is a standard 25-pin D-shell connector (known as a DB-25) that is
the adapter cable. The system console and auxiliary ports on the Route Switch Processor (RSP) in the
Cisco 7500 series also use EIA/TIA-232 connections; however, the 4T port adapter interfaces support
synchronous serial connections, and the console and auxiliary ports only support asynchronous
connections. Use caution when connecting EIA/TIA-232 cables to the 4T receptacles.
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Cables, Connectors, and Pinouts
Figure 1-4
EIA/ TIA-232 Adapter Cable Connectors
DTE
DCE
EIA/TIA-449 Connections
The router (VIP) end of all EIA/TIA-449 adapter cables is a high-density 60-pin plug. The opposite
(network) end of the adapter cable provides a standard 37-pin D-shell connector, which is commonly
cable. EIA/TIA-449 cables are available as either DTE (DB-37 plug) or DCE (DB-37 receptacle).
Figure 1-5
EIA/ TIA-449 Adapter Cable Connectors
DTE
DCE
V.35 Connections
The router (VIP) end of all V.35 adapter cables is a high-density 60-pin plug. The opposite (network)
end of the adapter cable provides a standard 34-pin Winchester-type connector commonly used for V.35
connections. Figure 1-6 shows the connectors at the network end of the V.35 adapter cable. V.35 cables
are available with a standard V.35 plug for DTE mode (CAB-V35MT=) or a V.35 receptacle for DCE
mode (CAB-V35FC=).
Figure 1-6
V.35 Adapter Cable Connectors
DTE
DCE
Note
Also available, but not shown in Figure 1-6, are CAB-V35MC=, a V.35 cable with a plug on the network
end for DCE mode, and CAB-V35FT=, a V.35 cable with a receptacle on the network end for DTE mode.
These cables are used for connecting V.35-equipped systems back to back.
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X.21 Connections
The router (VIP) end of all X.21 adapter cables is a high-density 60-pin plug. The opposite (network)
end of the adapter cable is a standard DB-15 connector. Figure 1-7 shows the connectors at the network
end of the X.21 adapter cable. X.21 cables are available as either DTE (DB-15 plug) or DCE (DB-15
receptacle).
Figure 1-7
X.21 Adapter Cable Connectors
DTE
1
8
DCE
9
15
EIA-530 Connections
The EIA-530 adapter cable is available in DTE mode only. The router (VIP) end of the EIA-530 adapter
cable is a high-density 60-pin plug. The opposite (network) end of the adapter cable is a standard DB-25
network end of the adapter cable.
Figure 1-8
EIA-530 Adapter Cable Connector
DTE
4T Port Adapter Cable Pinouts
The 4T port adapter supports EIA/TIA-232, EIA/TIA-449, X.21, V.35, and EIA-530 serial interfaces.
All 4T ports use a a 60-pin receptacle that supports all available interface types. A special serial adapter
cable, which is required for each port, determines the electrical interface type and mode of the interface.
The router (VIP) end of all of the adapter cables is a 60-pin plug; the connectors at the network end are
the standard connectors used for the respective interfaces.
All interface types except EIA-530 are available in DTE or DCE format: DTE with a plug connector at
the network end and DCE with a receptacle at the network end. V.35 is available in either mode with
either gender at the network end. EIA-530 is available in DTE only.
The tables that follow list the signal pinouts for both the DTE and DCE mode serial port adapter cables,
for each of the following 4T port adapter interface types:
•
•
•
•
•
EIA/TIA-232 pinouts, Table 1-3
EIA/TIA-449 pinouts, Table 1-4
EIA-530 pinouts, Table 1-5
X.21 pinouts, Table 1-7
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Cables, Connectors, and Pinouts
Table 1-3
EIA/ TIA-232 Adapter Cable Signals
DTE Cable (CAB-232MT=)
VIP End, HD1
DCE Cable (CAB-232FC=)
VIP End, HD
Network End,
DB-25 Plug
Network End,
DB-25 Receptacle
Pin Signal
60-Position Plug
60-Position Plug
Signal
Pin
Pin Signal
Signal
Pin
Shield ground
TxD/RxD
RxD/TxD
RTS/CTS
CTS/RTS
DSR/DTR
Circuit ground
DCD/LL
46
1
Shield ground
TxD
Shield ground
RxD/TxD
TxD/RxD
CTS/RTS
RTS/CTS
DTR/DSR
Circuit ground
LL/DCD
46
1
Shield ground
TxD
41 —> 2
36 <— 3
42 —> 4
35 <— 5
34 <— 6
36 <— 2
41 —> 3
35 <— 4
42 —> 5
43 —> 6
RxD
RxD
RTS
RTS
CTS
CTS
DSR
DSR
45
7
Circuit ground
DCD
45
7
Circuit ground
DCD
33 <— 8
44 —> 8
TxC/NIL
37 <— 15 TxC
38 <— 17 RxC
44 —> 18 LTST
43 —> 20 DTR
39 —> 24 TxCE
50
TxCE/TxC
NIL/RxC
DCD/LL
39 —> 15 TxC
40 —> 17 RxC
33 <— 18 LTST
34 <— 20 DTR
38 <— 24 TxCE
50
RxC/TxCE
LL/DCD
DTR/DSR
TxCE/TxC
DSR/DTR
RxC/TxCE
Mode 0
Ground
Mode_DCE
Mode 0
Ground
51
52
Shorting group
51
Shorting group
1. HD = high density.
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Table 1-4
EIA/ TIA-449 Adapter Cable Signals
DTE Cable (CAB-449MT=)
VIP End, HD1
DCE Cable (CAB-449C=)
VIP End, HD
Network End,
DB-37 Plug
Signal
Shield ground
SD+
Network End,
DB-37 Receptacle
Pin Signal
60-Position Plug
60-Position Plug
Signal
Pin
46
11
12
24
23
28
27
9
Pin
1
Signal
Pin
Shield ground
TxD/RxD+
TxD/RxD–
TxC/RxC+
TxC/RxC–
RxD/TxD+
RxD/TxD–
RTS/CTS+
RTS/CTS–
RxC/TxCE+
RxC/TxCE–
CTS/RTS+
CTS/RTS–
LL/DCD
Shield ground
RxD/TxD+
RxD/TxD–
TxCE/TxC+
TxCE/TxC–
TxD/RxD+
TxD/RxD–
CTS/RTS+
CTS/RTS–
TxC/RxC+
TxC/RxC–
RTS/CTS+
RTS/CTS–
NIL/LL
46
1
4
Shield ground
SD+
—>
4
28 <—
—> 22
<—
<— 23
<—
<— 24
—>
—> 25
<—
<— 26
<—
SD–
27 <— 22 SD–
13 —> ST+
14 —> 23 ST–
11 —> RD+
12 —> 24 RD–
5
ST+
5
ST–
6
RD+
6
RD–
7
RS+
1
<—
<— 25 RS–
RT+
23 —> 26 RT–
—> CS+
7
RS+
10
26
25
1
RS–
2
8
RT+
24 —>
8
RT–
9
CS+
9
9
2
<— 27
—> 10
37
CS–
10 —> 27 CS–
29 —> 10 LL
44
45
3
LL
Circuit ground
DSR/DTR+
DSR/DTR–
DTR/DSR+
DTR/DSR–
DCD/DCD+
DCD/DCD–
TxCE/TxC+
TxCE/TxC–
Circuit ground
Circuit ground
SC
Circuit ground
DTR/DSR+
DTR/DSR–
DSR/DTR+
DSR/DTR–
DCD/DCD+
DCD/DCD–
RxC/TxCE+
RxC/TxCE–
Circuit ground
Circuit ground
30
7
37 SC
—> 11 ON+
—> 29 ON–
<— 12 TR+
<— 30 TR–
—> 13 RR+
—> 31 RR–
<— 11
<— 29
—> 12
—> 30
<— 13
<— 31
—> 17
—> 35
19
ON+
4
ON–
8
7
TR+
3
8
TR–
4
5
RR+
5
6
RR–
6
13
14
15
16
TT+
26 <— 17 TT+
25 <— 35 TT–
TT–
SG
15
16
19 SG
20 RC
20
RC
Mode 1
Ground
49
48
Shorting group
Mode 1
Ground
49
48
Shorting group
Ground
Mode_DCE
51
52
Shorting group
1. HD = high density.
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Table 1-5
EIA-530 DTE Adapter Cable Signals (CAB-530MT=)
VIP End, HD1
60-Position Plug
Network End,
DB-25 Plug
Signal
Pin
46
11
12
28
27
9
Pin
1
Signal
Shield ground
TxD/RxD+
TxD/RxD–
RxD/TxD+
RxD/TxD–
RTS/CTS+
RTS/CTS–
CTS/RTS+
CTS/RTS–
DSR/DTR+
DSR/DTR–
DCD/DCD+
DCD/DCD–
TxC/RxC+
TxC/RxC–
RxC/TxCE+
RxC/TxCE–
LL/DCD
Shield ground
TxD+
—>
2
—> 14
<—
<— 16
—>
—> 19
<—
<— 13
<—
<— 22
<—
TxD–
3
RxD+
RxC–
4
RTS+
10
1
RTS–
5
CTS+
2
CTS–
3
6
DSR+
DSR–
4
5
8
DCD+
DCD–
TxC+
6
<— 10
<— 15
<— 12
<— 17
24
23
26
25
44
45
7
TxC–
RxC+
<—
9
RxC–
—> 18
7
LL
Circuit ground
DTR/DSR+
DTR/DSR–
TxCE/TxC+
TxCE/TxC–
Circuit ground
DTR+
DTR–
TxCE+
TxCE–
—> 20
—> 23
—> 24
—> 11
8
13
14
Mode_1
Ground
Mode_2
49
48
47
Shorting group
Shorting group
Ground
Mode_DCE
51
52
1. HD = high density.
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Table 1-6
V.35 Adapter Cable Signals
DTE Cable (CAB-V35FT= or CAB-V35MT=)
DCE Cable (CAB-V35FC= or CAB-V35MC=)
VIP End, HD1
Network End,
34-Position Plug
VIP End, HD
Network End,
34-Position
Receptacle
60-Position Plug
60-Position Plug
Signal
Pin
Pin
A
B
C
D
E
Signal
Frame ground
Circuit ground
RTS
Signal
Pin
Pin
A
B
C
D
E
Signal
Shield ground
Circuit ground
RTS/CTS
46
Shield ground
Circuit ground
CTS/RTS
46
Frame ground
Circuit ground
RTS
45
45
42 —>
35 <—
34 <—
33 <—
43 —>
44 —>
18 —>
17 —>
28 <—
27 <—
20 —>
19 —>
26 <—
25 <—
24 <—
35 <—
42 —>
43 —>
44 —>
34 <—
33 <—
28 <—
27 <—
18 —>
17 —>
26 <—
25 <—
22 —>
21 —>
20 —>
CTS/RTS
CTS
RTS/CTS
CTS
DSR/DTR
DCD/LL
DSR
DTR/DSR
LL/DCD
DSR
F
RLSD
DTR
F
RLSD
DTR
DTR/DSR
LL/DCD
H
K
P
DSR/DTR
DCD/LL
H
K
P
LT
LT
TxD/RxD+
TxD/RxD–
RxD/TxD+
RxD/TxD–
TxCE/TxC+
TxCE/TxC–
RxC/TxCE+
RxC/TxCE–
TxC/RxC+
TxC/RxC–
SD+
RxD/TxD+
RxD/TxD–
TxD/RxD+
TxD/RxD–
RxC/TxCE+
RxC/TxCE–
NIL/RxC+
NIL/RxC–
TxCE/TxC+
TxCE/TxC–
SD+
S
SD–
S
SD–
R
T
RD+
R
T
RD+
RD–
RD–
U
W
V
X
Y
SCTE+
SCTE–
SCR+
SCR–
SCT+
U
W
V
x
SCTE+
SCTE–
SCR+
SCR–
SCT+
Y
23 <— AA SCT–
19 —> AA SCT–
Mode 1
Ground
49
48
Shorting group
Mode 1
Ground
49
48
Shorting group
Mode 0
Ground
Mode_DCE
50
51
52
Shorting group
Shorting group
Mode 0
Ground
50
51
Shorting group
Shorting group
TxC/NIL
RxC/TxCE
RxC/TxD
Ground
53
54
55
56
TxC/NIL
RxC/TxCE
RxC/TxD
Ground
53
54
55
56
1. HD = high density.
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Port Adapter Slot Locations on the Supported Platforms
Table 1-7
X.21 Adapter Cable Signals
DTE Cable (CAB-X21MT=)
VIP End, HD1
DCE Cable (CAB-X21FC=)
Network End,
DB-15 Plug
Signal
VIP End, HD
60-Position Plug
Signal
Network End,
DB-15 Receptacle
Signal
60-Position Plug
Signal
Pin
46
11
12
9
Pin
1
Pin
46
11
12
9
Pin
1
Shield ground
TxD/RxD+
TxD/RxD–
RTS/CTS+
RTS/CTS –
RxD/TxD+
RxD/TxD–
CTS/RTS+
CTS/RTS –
RxC/TxCE+
RxC/TxCE–
Circuit ground
Shield ground
Transmit+
Transmit–
Control+
Shield ground
RxD/TxD+
RxD/TxD–
CTS/RTS+
CTS/RTS –
TxD/RxD+
TxD/RxD–
RTS/CTS+
RTS/CTS–
TxC/RxC+
TxC/RxC –
Circuit ground
Shield ground
Transmit+
Transmit–
Control+
—>
—>
—>
—>
<—
<—
<—
<—
<—
<—
2
—>
—>
—>
—>
<—
<—
<—
<—
<—
<—
2
9
9
3
3
10
28
27
1
10
4
Control–
10
28
27
1
10
4
Control–
Receive+
Receive+
11
5
Receive–
11
5
Receive–
Indication+
Indication–
Timing+
Indication+
Indication–
Timing+
2
12
6
2
12
6
26
25
15
26
25
15
13
8
Timing–
13
8
Timing–
Circuit ground
Shorting group
Circuit ground
Ground
Mode_2
48
47
Ground
Mode_2
48
47
Shorting
group
Ground
Mode_DCE
51
52
Shorting group
Ground
Mode_DCE
51
52
1. HD = high density.
Port Adapter Slot Locations on the Supported Platforms
This section discusses port adapter slot locations on the supported platforms. The illustrations that
follow summarize slot location conventions on each platform.
Cisco 7200 Series Router Slot Numbering
Figure 1-9 shows a Cisco 7206 with port adapters installed. In the Cisco 7206, port adapter slot 1 is in
the lower left position, and port adapter slot 6 is in the upper right position. (The Cisco 7202 and Cisco
7204 are not shown; however, the PA-4T can be installed in any available port adapter slot.)
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Port Adapter Slot Locations on the Supported Platforms
Figure 1-9
Port Adapter Slots in the Cisco 7206
TOKEN RING
FAST ETHERNET
ETHERNET-10BFL
ETHERNET 10BT
SERIAL-V.35
EN
TX
RX
EN
RX
TX
RX
RX
TX
RX
6
7
3
4
5
4
1
2
0
1
0
FAST ETHERNET INPUT/OUTPUT CONTROLLER
Cisco 7200
Series
Port adapter slot 5
Port adapter slot 3
Port adapter slot 1
Port adapter slot 6
Port adapter slot 4
Port adapter slot 2
Port adapter slot 0
VIP Slot Numbering
Figure 1-10 shows a partial view of a VIP motherboard with installed port adapters. With the
motherboard oriented as shown in Figure 1-10, the left port adapter is in port adapter slot 0, and the right
port adapter is in port adapter slot 1.
Figure 1-10
VIP Motherboard w ith Two Port Adapters Installed—Horizontal Orientation
Port adapter slot 0
Port adapter slot 1
Port adapter
handles not
shown
Note
In the Cisco 7507, and Cisco 7513 chassis, the VIP motherboard is installed vertically. In the Cisco 7505
chassis, the VIP motherboard is installed horizontally.
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Chapter 1 Overview
Identifying Interface Addresses
Figure 1-11
Interface Slot Num bers—Cisco 7505 Show n
VIP in interface processor slot 3
ROUTE SWITCH PROCESSOR
EJEC
CPU HALT RESET
SLOT
1
SLOT
0
CONSOLE
NORMAL
Slot 3
Slot 2
Slot 1
Interface
processor
slots
Slot 0
Identifying Interface Addresses
This section describes how to identify interface addresses for the PA-4T in supported platforms.
Interface addresses specify the actual physical location of each interface on a router or switch.
Interfaces on the PA-4T installed in a router maintain the same address regardless of whether other port
adapters are installed or removed. However, when you move a port adapter to a different slot, the first
number in the interface address changes to reflect the new port adapter slot number.
Interfaces on a PA-4T installed in a VIP maintain the same address regardless of whether other interface
processors are installed or removed. However, when you move a VIP to a different slot, the interface
processor slot number changes to reflect the new interface processor slot.
Note
Interface ports are numbered from left to right starting with 0.
Table 1-8 explains how to identify interface addresses.
Table 1-8
Identifying Interface Addresses
Platform
Interface Address Format
Numbers
Syntax
1/0
Cisco 7200 series routers
Port-adapter-slot-number/interface-port-number Port adapter slot—0 through 6
(depends on the number of slots
in the router)1
Interface port—0 through 3
3/1/0
VIP in Cisco 7500 series
routers
Interface-processor-slot-number/
port-adapter-slot-number/interface-port-number through 12 (depends on the
number of slots in the router)
Interface processor slot—0
Port adapter slot—always 0 or 1
Interface port—0 through 3
1. Port adapter slot 0 is reserved for the Fast Ethernet port on the I/O controller (if present).
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Identifying Interface Addresses
Cisco 7200 Series Routers Interface Addresses
This section describes how to identify the interface addresses used for the PA-4T in Cisco 7200 series
routers. The interface address is composed of a two-part number in the format
In Cisco 7200 series routers, port adapter slots are numbered from the lower left to the upper right,
beginning with port adapter slot 1 and continuing through port adapter slot 2 for the Cisco 7202, slot 4
for the Cisco 7204, and slot 6 for the Cisco 7206. (Port adapter slot 0 is reserved for the optional Fast
Ethernet port on the I/O controller—if present.)
The interface addresses of the interfaces on the PA-4T in port adapter slot 1 are
1/0 through 1/7 (port adapter slot 1 and interfaces 0 through 7). If the PA-4T was in port adapter slot 4,
these same interfaces would be numbered 4/0 through 4/7 (port adapter slot 4 and interfaces
0 through 3).
VIP Interface Addresses
This section describes how to identify the interface addresses used for the PA-4T on a VIP in Cisco 7500
series routers.
Note
Although the processor slots in the 7-slot Cisco 7507, the 13-slot, and the 13-slot Cisco 7576 are
vertically oriented and those in the 5-slot Cisco 7505 are horizontally oriented, all Cisco 7500 series
routers use the same method for slot and port numbering.
See Table 1-8 for the interface address format. The interface address is composed of a three-part number
in the format interface-processor-slot-number/port-adapter-slot-number/interface-port-number.
If the VIP is inserted in interface processor slot 3, then the interface addresses of the PA-4T are 3/1/0
through 3/1/3 (interface processor slot 3, port adapter slot 1, and interfaces 0 through 3). If the
port adapter was in port adapter slot 0 on the VIP, these same interface addresses would be numbered
3/0/0 through 3/0/3.
Note
slot 3 and install it in interface processor slot 2, the interface addresses become 2/1/0 through 2/1/3.
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