Specifications

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Cisco PA-FE-TX and Cisco PA-FE-FX Fast Ethernet 100BASE-T Port Adapter Installation and Configuration
OL-2899-02
Chapter 1 Overview
Identifying Interface Addresses
Interface Addresses of Cisco 7100 Series Routers
The interface address for a module installed on a Cisco 7100 series router is composed of a two-part
number in the format slot/port-number. The first number identifies the slot of the router in which the
module is installed—slot 3 on the Cisco 7120 series routers and slot 4 on the Cisco 7140 series routers.
The second number identifies the physical interface port number on the module.
For example, if the 2-port module is installed in a Cisco 7120, and therefore in slot 3, the interface
address of the left port is 3/0 and the interface address of the right port is 3/1.
If you remove the module from the Cisco 7120, and install it in a Cisco 7140, and therefore slot 4, the
addresses of the interface ports become 4/0 and 4/1.
Interface Addresses of Cisco 7200 Series Routers, Cisco 7200 VXR Routers, and
CiscouBR7200 Series Routers
The interface address for a module installed in Cisco 7200 series routers, Cisc 7200 VXR routers, or
Cisco uBR7200 series routers is composed of a two-part number in the format slot/port-number.
In Cisco 7200 series routers, slots are numbered from the lower left to the upper right, beginning with
slot 1 and continuing through slot 2 for the Cisco 7202, slot 4 for the Cisco 7204 and Cisco 7204VXR,
and slot 6 for the Cisco 7206 and Cisco 7206VXR. (Slot 0 is reserved for the optional Fast Ethernet port
on the I/O controller—if present.)
The interface addresses of a 4-port module installed in slot 1 would be 1/0 through 1/4 (slot 1 and
interface port 0 through port 4). If the 4-port module was installed in slot 4, these same interfaces would
be numbered 4/0 through 4/4 (slot 4 and interface port 0 through port 4).
In Cisco uBR7200 series routers, slots are numbered slot 1 and slot 2 for the Cisco uBR7246 and
Cisco uBR7246VXR and slot 1 for the Cisco uBR7223. (Slot 0 is always reserved for the Fast Ethernet
port on the I/O controller—if present.) The individual interfaces always begin with 0. The number of
additional interfaces depends on the number of interface ports on a module.
The interface addresses of a module installed in slot 2 would be 2/0 and 2/1 (slot 2 and interface ports 0
and 1). If a module is installed in slot 1, these same interface addresses would be 1/0 and 1/1 (slot 1 and
interface ports 0 and 1).
Interface Addresses of Cisco 7301 Router
There is only one slot on the Cisco 7301 router that accepts modules and it is numbered as slot 1. The
interface address is composed of a two-part number in the format slot/port-number. For example, if a
2-port module is installed on a Cisco 7301 router, the two interface addresses would be 1/0 and 1/1 from
left to right.
Interface Addresses of Cisco 7401ASR Router
There is only one slot on the Cisco 7401ASR router that accepts modules and it is numbered as slot 1.
The interface address is composed of a two-part number in the format slot/port-number. For example, if
a 2-port module is installed on a Cisco 7401ASR router, the two interface addresses would be 1/0 and
1/1 from left to right.