[cisco-voip] SIP session timer in IOS gateway

[Norton, Mike]

I'd like to adjust IOS's behavior around the SIP session-expires timer. Wondering if anybody knows if the command I need exists...

According to RFC 4028:

"If the side not performing refreshes does not receive a session refresh request before the session expiration, it SHOULD send a BYE to terminate the session, slightly before the session expiration."

My problem stems from the fact that "slightly before" is left open to the imagination. The RFC "recommends" not more than 32 seconds but does not have any specific "requirement." The default behaviour of IOS seems to use a longer value. I.e., it sends the BYE a little too prematurely for my situation. I need IOS to let the timer get closer to expiring before it issues the BYE.

I know it's a long-shot, but someone please tell me there is a command for adjusting this! Not finding anything in the docs. Hoping to avoid having to disable the session timer or crank it up to 11. I love SIP interop, it's so much fun! :-(

-mn

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