[cisco-voip] Adjusting sip timeout in AS5400

[Peter Grace]

In the interest of helping other people who may have similar issues as me in
the future, such that they might search google and find this in the
archives:

The problem I was having revolved around having dial-peers time out.  ISDN's
T310 timer (the timer supposedly involved in deciding how long to wait
before pushing a congestion tone to the caller) is 10 seconds, and adjusting
it on our lines didn't have much effect.

I went searching for an alternative, maybe find a way to set sip timers such
that the dialplan would work much faster.  In our case, we have a large
number of sip gateways that can potentially take the call, so it's not a big
deal for us to set timers/retries low.

Using
http://www.cisco.com/en/US/docs/ios/12_2/voice/configuration/guide/vvfsip.html,
I was able to change our sip settings from the default retries of 6,
to 1
retry per host, and I tweaked down the 500ms wait-for-reply down to 250ms
(since even if one gateway is slow, there's a ton of others ready and able
to take it's place).

This has resolved the issue with 0x66 for me, where the timer expires before
a valid sip host is found.  Obviously, if you don't have a large set of sip
gateways to take a call then your mileage may vary.

sip-ua
 retry invite 1
 retry response 1
 retry bye 1
 retry cancel 1
 timers trying 250
 timers expires 60000
 timers connect 250
 timers disconnect 250


Thanks to all and Good luck to those still searching for answers,
Pete

On Thu, Aug 7, 2008 at 5:30 PM, Peter Grace <pete.grace at gmail.com> wrote:

> Hi list,
>
> Is there a way on the AS5400 to configure the maximum time it will wait for
> a positive connection via sip before moving to the next dial-peer?  In my
> testing with the 0x66 error I posted earlier today, I found that the problem
> could be caused by the AS5400 waiting to hear a response from a sip gateway
> that is not online.  I'd like to tweak the timeout to a smaller number in an
> effort to have it hunt through our many sip gateways faster.
>
> Thanks in advance,
> Pete
>
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