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Chapter
Identifying Interface Addresses
This section describes how to identify interface addresses for the PA-2CE1 in supported platforms.
Interface addresses specify the actual physical location of each interface on a router or switch.
Interfaces on the PA-2CE1 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-2CE1 installed in a VIP2 maintain the same address regardless of whether other
interface processors are installed or removed. However, when you move a VIP2 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 1-3 explains how to identify interface addresses.
Table 1-3
Identifying Interface Addresses
Platform
Cisco 7200 series routers
VIP2 in Cisco 7000 series or
Cisco 7500 series routers
1. Port adapter slot 0 is reserved for the Fast Ethernet port on the I/O controller (if present).
Cisco 7200 Series Routers Interface Addresses
This section describes how to identify the interface addresses used for the PA-2CE1 in Cisco 7200 series
routers. The interface address is composed of a two-part number in the format
port-adapter-slot-number/interface-port-number. See Table 1-3 for the interface address 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-2CE1 in port adapter slot 1 are
1/0 through 1/7 (port adapter slot 1 and interfaces 0 through 7). If the PA-2CE1 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 7).
The interface addresses of the interfaces on a PA-2CE1 in port adapter slot 2 are 2/0 and 2/1 (port adapter
slot 2 and interfaces 0 and 1). If the PA-2CE1 was in port adapter slot 1, these same interfaces would be
numbered 1/0 and 1/1 (port adapter slot 1 and interfaces 0 and 1).
OL-3519-01
Interface Address Format
Port-adapter-slot-number/interface-port-number
Interface-processor-slot-number/port-adapter-slot-
number/interface-port-number
Numbers
Port adapter slot—0 through
6 (depends on the number of
slots in the router)
Interface port—0 or 1
Interface processor slot—0
through 12 (depends on the
number of slots in the
router)
Port adapter slot—0 or 1
Interface port—0 or 1
PA-2CE1 Channelized E1 Port Adapter Installation and Configuration
Identifying Interface Addresses
Syntax
1/0
1
3/1/0
1-7
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