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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 7304 PCI Port Adapter Carrier Card Interface Addresses
In the Cisco 7304 router, port adapters are installed in a Cisco 7304 PCI port adapter carrier card, which
installs in Cisco 7304 router module slots 2 through 5. The port adapter slot number is the same as the
module slot number. See Figure 1-7 and Figure 1-8.
The interface address is composed of a two-part number in the format
module-slot-number/interface-port-number. See Table 1-3. For example, if a single-port PA-POS-1OC3
is installed in the Cisco 7304 PCI port adapter carrier card in Cisco 7304 router module slot 3, the
interface address would be 3/0.
Cisco 7401ASR Router Interface Addresses
In the Cisco 7401ASR router, only one slot accepts port adapters and it is numbered slot 1. See
Figure 1-9.
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 example, if a single-port
PA-POS-1OC3 is installed on a Cisco 7401ASR router, the interface address would be 1/0.
Cisco 7500 Series Routers VIP Interface Addresses
In Cisco 7500 series routers, port adapters are installed on a versatile interface processor (VIP), which
installs in interface processor slots 0 through 12 (depending on the number of slots in the router). The
port adapter can be installed in either bay (port adapter slot 0 or 1) on the VIP. See Figure 1-10,
Figure 1-11, Figure 1-12, and Figure 1-13.
The interface address for the VIP is composed of a three-part number in the format
interface-processor-slot-number/port-adapter-slot-number/interface-port-number. See Table 1-3.
The first number identifies the slot in which the VIP is installed (slot 0 through 12, depending on the
number of slots in the router).
The second number identifies the bay (port adapter slot) on the VIP in which the port adapter is installed
(0 or 1). The bays are numbered from left to right on the VIP.
The third number identifies the physical port number (interface port number) on the port adapter. The
port numbers always begin at 0 and are numbered from left to right. The number of additional ports
depends on the number of ports 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 a VIP in interface processor slot 3, port
adapter slot 1, the interface addresses would be 3/1/0.
Note Although the processor slots in the seven-slot Cisco 7507 and the thirteen-slot Cisco 7513 chassis are
vertically oriented and those in the five-slot Cisco 7505 are horizontally oriented, all Cisco 7500 series
routers use the same method for slot and port numbering.