Does Adtran 550 support point-to-multipoint frame relay?

[sydtran]

Hi all,

I have encountered a problem when configuring frame relay network on cisco routers with using Adtran 550 as the frame relay switch, and hope someone can give me a hand.

Lavender, Berrys and LongMile are connected to Adtran 550 via serial links. I adopted point-to-multipoint frame relay scheme on the routers. The configurationn is listed below. Longmile was set to be Hub, and the other two were spoke routers.

(On LongMile router)

!

interface serial 0/0/0

ip address 172.16.141.25 255.255.255.248

encapsulation frame-relay

ip ospf network point-to-multipoint

frame-relay interface-dlci 102

frame-relay interface-dlci 103

...

The configurations on Berrys and Lavender are similar except for the IP address and the local DLCI. I correctly assigned IP address and DLCI to each router, and there wasn't layer1 connectivity issue. But when I brought up Adtran and the routers, the frame relay didn't work. when I issued 'show frame-relay pvc' command on the router, it showed the connection was 'inactive', which means that the PVC wasn't established. However, when I replaced the Adtran with a cisco router and configured it as a frame relay switch, the frame relay can work well which suggests my configuration is fine.

So my question is: Does Adtran 550 not support point-to-multipoint frame relay configurations or is there anything wrong in my configuration? Do I need to add 'ietf' at the end of 'encapsulation frame-relay' command in order to make it work?

Any ideas are appreciated!

Thanks!

[Anonymous · Accepted solution]

You have actually figured it out yourself. You are correct that in order for the Frame Relay to work between the Cisco routers and the ATLAS you must issue the 'encapsulation frame-relay ietf'. That should resolve your problem as long as all your cross-connects are set up in the ATLAS.

Hope this hleps,

Patrick

[sydtran]

Hi Patrick,

Thanks a lot! I haven't got the chance to verify this on real equipments yet but I will do it. And I just realized that I missed 'ietf' at the end of the command when I posted my thread and it was only my guessing.

Thanks for the help!

Cheers,

Meng