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Identifying Port Adapter Slot and PA-E3 Interface Port Numbers
PA-E3 Serial Port Adapter Installation and Configuration
8-4
Figure 8-2 PA-E3 Interface Port Address Example—Cisco uBR7246 Shown
You can identify interface ports by physically checking the port adapter/interface port location on
the back of the router or by using software commands to display information about a specific
interface or all interfaces in the router.
VIP2 Ports
In the router, physical port addresses specify the actual physical location of each interface port on
the router interface processor end. (See Figure 8-3.) Each address is composed of a three-part
number in the format interface processor slot number/port adapter number/interface port number,
as follows:
• The first number identifies the chassis slot in which the VIP2 is installed (as shown in the sample
system in Figure 8-3).
• The second number identifies the physical port adapter slot on the VIP2, and is either 0 or 1.
• The third number identifies the interface port on each E3 serial port adapter, which is always
numbered as interface 0 for the one-port PA-E3 and 0 or 1 for the two-port PA-2E3.
Note Although the processor slots in the 7-slot Cisco 7000 and Cisco 7507 and 13-slot Cisco 7513
are vertically oriented and the slots in the 5-slot Cisco 7010 and Cisco 7505 are horizontally
oriented, all models use the same method for slot and port numbering.
Interface ports on the 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 first
number in the address changes to reflect the new chassis slot number.
Figure 8-3 shows the port adapter slots and interface ports of a sample Cisco 7505 system. On the
VIP2, the firstport adapter slot numberis always 0.The second port adapterslot number is always 1.
The individual interface port numbers always begin with 0. The number of additional ports depends
on the number of ports on a port adapter.
For example, the serial port on a one-port PA-E3 in the first port adapter slot in chassis slot 3 is
numbered 3/0/0. (See Figure 8-3.) If the PA-E3 is in port adapter slot 1, this same port is numbered
3/1/0. The serial ports on a two-port PA-2E3 in the first port adapter slot in chassis slot 3 are
numbered 3/0/0 and 3/0/1.
Port adapters can occupy either port adapter slot; there are no restrictions.
15260
PA-E3
port adapter
(port number 1/0)
E3 SERIAL
RCLK
FERF
RL
AIS
OOF
LL
RCLK
ENABLED
FERF
RL
AIS
OOF
LL
XMTR
RCVR