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New Member

Frame-relay end-to-end keepalive question

I have a question concerning Frame-relay end-to-end keepalive.

Can this feature be used when one of the Cisco routers is terminated on an ATM PVC (Frame-relay ATM interworking)?

I searched the documentation but nothing relevant.

2 REPLIES

Re: Frame-relay end-to-end keepalive question

I think its your LMI which does keepalives on the FR interfaces end to end. LMI tells you the status of the PVC's terminated on the FR switch.

I dont think it is possible to configure LMI's on ATM interfaces !!!

Cheers

New Member

Re: Frame-relay end-to-end keepalive question

Yes, you will need to use the ATM OAM (Operation, Administration, and Maintenance) cell management feature on the atm side. This will allow for the F/R LMI to be translated to an ATM OAM cell and visa versa. ATM PVC's must be configured like this in order to support OAM cell management:

!

interface ATM2/0.101 point-to-point

description ** blah, blah, blah... **

mtu 1500

bandwidth 1536

ip address 1.1.1.1 255.255.255.252

pvc TESTPVC 1/101

vbr-nrt 44209 1720 32

oam-pvc manage

encapsulation aal5snap

!

!

This way, if the frame side is down, your ATM sub-interface will go down and visa versa.

Regards, Tom

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