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New Member

Frame Relay to ATM Service Interworking Interoperability with switch Marcon

I am troubleshouting two router 7206-vxr connected throught an ATM cloud with switch Marconi.

Router A -- switch marconi A -- ATM Cloud -- switch marconi B -- Router B

a Router C(frame-relay with v35) is connected throught a frame-relay cloud to Switch A

I have 2 PVC in a test environment:

pvc 800( between router A and router B, connection ATM) is UP, while PVC 900 (that is a case of Frame Relay to ATM Service Interworking between a 7206-vxr and a 2600) is down.

The problem isolation is this: I verified that in the router CISCO7206vxr

OAM PVC management bring down the connection, using

debug atm oam

I obtained an output as

Nov 12 18:01:59.717: ATM OAM(ATM5/0.800): Timer: VCD#9 VC 10/800 Status:2 CTag:7

06 Tries:0

Nov 12 18:01:59.717: ATM OAM LOOP(ATM5/0.800) O: VCD#9 VC 10/800 CTag:2C3

Nov 12 18:01:59.721: ATM OAM LOOP(ATM5/0) I: VCD#9 VC 10/800 LoopInd:0 CTag:2C3

Nov 12 18:01:51.853: ATM OAM(ATM5/0.900): Timer: VCD#7 VC 10/900 Status:1 CTag:5

3138 Tries:2

Nov 12 18:01:51.853: ATM OAM LOOP(ATM5/0.900) O: VCD#7 VC 10/900 CTag:CF93

Nov 12 18:01:52.441: atm_oam_ais_inline(ATM5/0): AIS signal, failure=0x6A, VC 10

/700

I verified (WITH cTag) that end-to-end loopback cells for pvc 800 come from ROUTER B AND

I NEVER SEE (ON DEBUG ATM OAM) LOOPBACK CELL COMING FROM MARCONI SWITCH A

There is something to do with IOS software or with configurations of router?

It is only a problem of switch Marconi?

Information about router 7206vxr

IOS: c7200-js-mz.122-5.bin

sh running of router A (ROUTER B is simmetric)

...

cONFIGURATION OF PVC

interface ATM5/0.800 point-to-point

mtu 1500

bandwidth 2000

ip address 192.168.250.130 255.255.255.252

pvc ROUTERB 10/800

protocol ip 192.168.250.129

abr 2000 2000

oam-pvc manage

encapsulation aal5snap

!

!

interface ATM5/0.900 point-to-point

description "Link c"

mtu 1500

ip address 172.20.136.169 255.255.255.252

pvc ROUTERC 10/900

protocol ip 172.20.136.170

ubr 1900

oam-pvc manage

oam retry 3 5 1

encapsulation aal5snap

sh runn DI ROUTER c

interface Serial0

ip address 172.20.136.170 255.255.255.252

no ip mroute-cache

encapsulation frame-relay IETF

frame-relay map ip 172.20.136.169 900 broadcast

1 REPLY
New Member

Re: Frame Relay to ATM Service Interworking Interoperability wit

You need to make sure on your point to point connection that you are using non-proprietary ATM protocols since you are using two different vendor products. The common standard is RFC1483.

Most vendor products default to their proprietary modes of operation. Cisco and Marconi do.

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