Specifications

Configuring the 12E/2FE Interfaces

PA-12E/2FE Ethernet Switch 10BASE-T and 100BASE-TX Port Adapter Installation and Configuration

6-2

Conﬁguring the 12E/2FE Interfaces

If you installed a new 12E/2FE port adapter or if you want to change the conﬁguration of an existing

interface, you must use the privileged-level conﬁgure command. If you replaced a 12E/2FE port

adapter that was previously conﬁgured, the system will recognize the new 12E/2FE port adapter

interfaces and bring each of them up in their existing conﬁguration.

After you verify that the new 12E/2FE port adapter is installed correctly (the enabled LED goes on),

use the conﬁgure command to conﬁgure the new interfaces. Be prepared with the information you

will need, such as the following:

• Protocols and encapsulations you plan to use on the new interfaces

• Protocol speciﬁc information, such as Internet Protocol (IP) addresses if you will conﬁgure the

interfaces for IP routing

Note Conﬁguration commands are executed from the privileged level of the EXEC command

interpreter, which usually requires password access. See the “Using the EXEC Command

Interpreter” section on page 6-1 and contact your system administrator, if necessary, to obtain

access.

For complete descriptions of interface commands and the conﬁguration options available for

Cisco 7200 series- and Cisco uBR7246-related interfaces, refer to the publications listed in the “For

More Information” section on page v.

Identifying Port Adapter Slot and Interface Port Numbers

In a Cisco 7200 series router (see Figure 6-1) or a Cisco uBR7246 (see Figure 6-2) physical port

addresses specify the actual physical location of each interface port on the router. This address is

composed of a two-part number in the format port adapter slot number/interface port number as

follows:

• The ﬁrst number identiﬁes the chassis slot in which the 12E/2FE port adapter is installed.

• The second number identiﬁes the interface ports on each 12E/2FE port adapter, which are always

numbered in sequence as interface 0 through 13.

Note For the Cisco 7206 router shelf, physical port addresses are composed of a three-part number

in the format shelf number/port adapter slot number/interface port number, where the shelf number

is a number assigned to the Cisco 7206 router shelf during the initial conﬁguration of the Cisco

AS5800 Universal Access Server. A Cisco AS5800 Universal Access Server can consist of several

shelves; therefore, each shelf is assigned a number.

Interface ports on the 12E/2FE port adapter 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 port adapter slot number in the address changes to reﬂect the new slot number.

Figure 6-1 shows the interface ports of a 12E/2FE port adapter in slot 3 and slot 4 of a Cisco 7206

router. The port adapter slot numbers start with 1 and continue through 6 for the Cisco 7206, and

continue through 4 for the Cisco 7204 (slot 0 is always reserved for the optional Fast Ethernet port

on the I/O controller—if present). The individual interface port numbers always begin with 0. The

number of additional ports depends on the number of ports on a port adapter. Port adapters can

occupy any port adapter slot; there are no restrictions.