Look Ahead Routing

[abali]

Just need to understand the look-ahead feature implementation on the IOS.

Scenrio -- two locations with their local PBX and voice gateway routers. Trunk connection to the Cisco router (T1/E1 trunk). Network has set bandwidth for the voice calls.

How the router at location-1 gets the status of the location-2 router in real-time that RESOURCE NOT AVAILABLE and in-turn inform the PBX. In this case, PBX will re-route the call using alternate path. IS look-ahead routing option available on the IOS?

[bwilmoth]

Check for the RSVP for your requirement. But RSVP will work with Cisco routers and not with PBX. ALso look for NBAR kind of solutions, which will help you.

[rapik]

it is not quite understand what your question is.

what do you mean when you say "RESOURCE NOT AVAILABLE"?

if you mean lost ip connectiviy between gateways, then you should use local voice busyout feature.

or do you mean something else?