Configure ATM on a Cisco Router

Contributed by Al Banks  
Tagged: Cisco router  

ATM is growing in popularity as a wide-area network (WAN) medium. ATM offers small cell size and strict quality of service, allowing voice, video, and data to coexist.

First, Terminology:

VPI – Virtural Path Identifier, 5 in this example
VCI – Virtual Circuit Identifier, 200 in this example
VC – Virtual Circuit

In this example, the ATM interface is atm0/0, and the IP addressing on the VC is 192.168.0.0/30.

Connect to the router, enter the appropriate passwords, then:

Enter configuration modeconfigure terminal

Enter interface configuration:interface atm0/0

Enable the interface:no shutdown

Create the subinterface:interface atm0/0.200 point-to-point

Configure the local IP address:ip address 192.168.0.1 255.255.255.252

Configure the VC:pvc 5/200

Configure the protocols on this VC:protocol ip 192.168.0.2 broadcast

Configure the encapsulation:encapsulation aal5snap

That’s all!