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PA-POS-1OC3 Single-Port Port Adapter Installation and Configuration Guide
OL-6514-04
Chapter 1 PA-POS-1OC3 Overview
Identifying Interface Addresses
Cisco 7600 Series Routers FlexWAN Module Interface Addresses
In Cisco 7600 series routers, port adapters are installed in a FlexWAN or Enhanced FlexWAN module,
which installs in module slots 2 through 13 (depending on the number of slots in the router). The port
adapter can be installed in either bay (port adapter bay 0 or 1) on the FlexWAN or Enhanced FlexWAN
module. See Figure 1-14, Figure 1-15, Figure 1-16, and Figure 1-17.
The interface address is composed of a three-part number in the format
module-slot-number/port-adapter-bay-number/interface-port-number. See Table 1-3.
The first number identifies the module slot of the chassis in which the FlexWAN module is installed (slot
2 through slot 3, 6, 9, or 13 depending on the number of slots in the chassis). These module slots are
generally numbered from top to bottom, starting with 1. The Cisco 7609 is the exception with slots
numbered right to left, starting with 1.
The second number identifies the bay of the FlexWAN module in which the port adapter is installed
(0 or 1). The bays are numbered from left to right on the FlexWAN module.
The third number identifies the physical port number on the port adapter. The PA-POS-1OC3 is a
single-port port adapter, therefore the port is always 0
For example, if a single-port PA-POS-1OC3 is installed in the FlexWAN module, which is inserted in
module slot 3, port adapter bay 0, then the interface address of the port adapter would be 3/0/0 (module
slot 3, port adapter bay 0, and port 0). If the same port adapter is in port adapter bay 1 on the FlexWAN
module, the interface addresses would be numbered 3/1/0.