Frame relay end to end keepalives

Frame relay end to end keepalives is a feature on frame relay who allows to monitor if a complete pvc is online, monitoring the circuit from one edge to the other.

Without this freature, you only test the connectivity of the PVC against the local frame relay switch using LMI.

Configuration:

R(config)# map-class frame-relay map_class_name
R(config-map-class)# frame-relay end-to-end keepalive mode {bidirectiona | request | reply | passive-reply}
R(config-if)# frame relay class map class name

If one of the edges uses request, the other must have reply activated. Using bidirectional in both edges the protocol works fine.

Another important point, is that end to end keepalives could be activated for some dlci an not to other, using subinterfaces.


Example:

r1(config)# map-class frame-relay eek1
r1(config-map-class)# frame-relay end-to-end keepalive mode bidirectional
r1(config) interface serial 1/0.1 point-to-point
r1(config-if) ip address 192.168.1.1 255.255.255.0
r1(config-if) frame-relay interface-dlci 102
r1(config-if) frame-relay class eek1

r2(config)# map-class frame-relay eek1
r2(config-map-class)# frame-relay end-to-end keepalive mode bidirectional
r2(config) interface serial 1/1.1 point-to-point
r2(config-if) ip address 192.168.1.2 255.255.255.0
r2(config-if) frame-relay interface-dlci 201
r2(config-if) frame-relay class eek1

Author : Ivan Varela

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