Configure The Lan Interface; Create The Group Asynchronous Interface - Cisco 2620 Configuration Manual

Chapter 3 Configuring with the Command-Line Interface

Configure the LAN Interface

The next task you need to perform is to configure the LAN interfaces on your Cisco 3600 series router.
For the purpose of this procedure, we are showing how to configure an Ethernet interface. If the interface
you are configuring is different, refer to the "Configuring LAN Interfaces" chapter in the Cisco IOS
Release 11.3 Configuration Fundamentals Configuration Guide or to the configuration notes that
shippedwith your module.
To configure an Ethernet interface, perform the following tasks, beginning in global configuration mode:
Step 1
Step 2
Step 3
Note
The Ethernet and loopback interfaces should be on different subnets.

Create the Group Asynchronous Interface

A group asynchronous interface is a parent interface that applies protocol characteristics to specified,
associated asynchronous interfaces. After you create a group asynchronous interface, all associated
asynchronous interfaces (called members) can be configured through it. Group asynchronous interfaces
can speed configuration time and help you maintain interface configuration consistency.
To configure a group asynchronous interface, perform the following tasks, beginning in global
configuration mode:
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
OL-1957-04
Command
interface ethernet slot/port
ip address ip-address ip-address
mask
no shutdown
Command
interface group-async number
ip unnumbered Loopback number
encapsulation ppp
async mode interactive
peer default ip address pool
name
no cdp enable
Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
Configuring the Digital Modem Network Module for the Cisco 3640 Router
Description
Select the Ethernet interface.
Assign an IP address and subnet mask to
the Ethernet interface.
Enable this interface
Description
Create a group asynchronous interface.
Enable IP processing on the loopback
interface without assigning an explicit IP
address to the interface.
Set the Point-to-Point Protocol (PPP) as the
encapsulation method used by this
interface.
Enable SLIP and PPP EXEC commands on
this interface.
Specify an IP address from the defined IP
address pool to be returned to a remote peer
connecting to this interface.
Disable CDP on this interface.
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