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
