Changing the VC idle timeout

[denzilstephens]

Hello,

We have our own B-RAS that various makes of DSL router connect to.

If there is a brief failure of the B-RAS the virtual interfaces fail and reconnect.

We have noticed the Cisco routers take over 5 minutes to reconnect whereas other makes only take 60 seconds. I believe this is due to the VC idle disconnect time on the Cisco ATM interfaces:

router#show int atm0/1/0

...

  VC idle disconnect time: 300 second

When i try to change this under the PVC configuration i receive the following error:

router(config)#int atm0/0/0

router(config-if)#pvc 0/38

router(config-if-atm-vc)#idle-timeout 60

idle timeout is only for svc and autovc

My full DSL config is:

interface ATM0/0/0

no ip address

shutdown

no atm ilmi-keepalive

pvc 0/38

  encapsulation aal5mux ppp Virtual-Template1

interface Virtual-Template1

mtu 1486

ip address negotiated

ip virtual-reassembly in

ip tcp adjust-mss 1446

keepalive 1 2

ppp pap sent-username ####### password 7 #########

Has anyone else experienced this issue? How can i reduce the VC idle timer?

Many thanks,

Denzil

[John Blakley]

According to the following link, the VC timeout is set to 5 minutes. The absolute minimum is 0:

http://www.cisco.com/en/US/docs/ios/12_2/wan/command/reference/wrfatmtx.html#wp1018694

HTH,
John

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[denzilstephens]

Hi John,

Unfortunately i am uanble to use that command:

router(config)#int atm0/0/0

router(config-if)#pvc 0/38

router(config-if-atm-vc)#idle-timeout 60

idle timeout is only for svc and autovc

I am using PVCs and am not sure how to do otherwise or if there is another way to set the timeout.

Any ideas?

Thanks,

Denzil