Oct 12 2011 12:31AM GMT
Posted by: Sulaiman Syed
active, CCIE, Cisco, Configure, end-to-end, how, ios, keepalive, network, PVC, router, to, VC
How to Insure End to end connectivity in Frame-Relay
Posted by: Sulaiman Syed
active, CCIE, Cisco, Configure, end-to-end, how, ios, keepalive, network, PVC, router, to, VC
This is one of the nice features that i just discovered yesterday. It is the ability to make sure an end-to-end frame-relay connectivity between Cisco routers.
In the local router, we can see the PVC status.
Rack1R3#show frame-relay pvc
PVC Statistics for interface Serial1/0 (Frame Relay DTE)
Active Inactive Deleted Static
Local 1 0 0 0
Switched 0 0 0 0
Unused 3 0 0 0
Now, although it is showing active in this side. It doesn’t really mean it is active at the other end. Multiple ISP, or networks can be between the two routers. So, let’s see how to insure the end to end frame relay connectivity. Do the following configurations as shown…
Rack1R3#conf tRack1R3(config)#map-class frame-relay END-ENDRack1R3(config-map-class)#frame-relay end-to-end keepalive mode bidirectionalRack1R3(config-map-class)#exitRack1R3(config)#int serial 1/0.1Rack1R3(config-subint)#frame-relay class END-ENDRack1R3(config-subint)#endRack1R3#
Now, a similar configurations should be done on the other end. What we are doing is creating a map-class for frame-relay. Enabling keepalive in bidirectional mode. Then applying this map-class into the required interface, or sub-interface. Lets see the out put of this command.
Rack1R3#show frame-relay end-to-end keepaliveEnd-to-end Keepalive Statistics for Interface Serial1/0 (Frame Relay DTE)DLCI = 305, DLCI USAGE = LOCAL, VC STATUS = ACTIVE (EEK UP)SEND SIDE STATISTICSSend Sequence Number: 34, Receive Sequence Number: 35Configured Event Window: 3, Configured Error Threshold: 2Total Observed Events: 37, Total Observed Errors: 0Monitored Events: 3, Monitored Errors: 0Successive Successes: 3, End-to-end VC Status: UPRECEIVE SIDE STATISTICSSend Sequence Number: 34, Receive Sequence Number: 33Configured Event Window: 3, Configured Error Threshold: 2Total Observed Events: 36, Total Observed Errors: 0Monitored Events: 3, Monitored Errors: 0Successive Successes: 3, End-to-end VC Status: UP
From the output. it is seen that the end to end status of VC is UP.
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