Single Interface Frame Relay Implementation and Monitoring

Let’s get started by looking at a simple example. Say that we just want to connect two routers with a single PVC. Here’s how that configuration would look:

RouterA#config t
Enter configuration commands, one per line. End with CNTL/Z.
RouterA(config)#int s0/0
RouterA(config-if)#encapsulation frame-relay
RouterA(config-if)#ip address 172.16.20.1 255.255.255.0
RouterA(config-if)#frame-relay lmi-type ansi
RouterA(config-if)#frame-relay interface-dlci 101
RouterA(config-if)#^Z
RouterA#

The first step is to specify the encapsulation as Frame Relay. Notice that since I didn’t specify a particular encapsulation type—either Cisco or IETF—the Cisco default type was used. If the other router were non-Cisco, I would’ve specified IETF. Next, I assigned an IP address to the interface, then specified the LMI type of ANSI (the default being Cisco) based on information provided by the telecommunications provider. Finally, I added thevDLCI of 101, which indicates the PVC we want to use (again, given to me by my ISP) andvassumes there’s only one PVC on this physical interface.

That’s all there is to it—if both sides are configured correctly, the circuit will come up.