[cisco-voip] Outbound SIP connection failing in CUBE due to some timer... maybe.

[Kent Roberts]

Just keep in mind ccsip and the ccapi can generate high cpu as well as log traffic.  Syslog off the router is good so you don’t over run the buffer.   Or set up a 1-5 meg buffer.  

Not sure of your call volume but don’t forget cpu load.  Granted the 44xx platform is beafy  but sometimes that’s overlooked with trying to resolve an issue.   

Might take a bit but if you can get sbc logs from your itsc for your test call they can prove useful too

We had to do that before for tac to review an issue.   We also learned of cube crashes resulting in router reboots because the iOS coders assumed everyone followed standards.  And data back missing something crashed it

Kent

> On Apr 16, 2021, at 10:27, Nick Barnett <nick at barnett.email> wrote:
> 
> 
> Unfortunately, I only had ccsip and ccapi inout debugs running... I'll add those 2 other sip debugs the next time. This is what I had handy from last night. I'm sure new traces would be very helpful, but can't get to it right now and wanted to at least respond.
> 
> Here is a sanitized copy of the cancel.  The time between the trying and the cancel is always between 6.8 and 6.9 seconds.  
> 
> CANCEL sip:17633334444 at voip.centurylink.com:5100 SIP/2.0
> Via: SIP/2.0/UDP voip.centurylink.com:5060;branch=z9hG4bK2804DC216B
> From: sip:1652223333 at 10.10.10.10;tag=7FF3BC40-14BB
> To: <sip:17635670707 at voip.centurylink.com>
> Date: Thu, 15 Apr 2021 18:39:42 GMT
> Call-ID: C6AB9407-9D5011EB-88BF8F36-HI-MOM at voip.centurylink.com
> CSeq: 102 CANCEL
> Max-Forwards: 70
> Timestamp: 1618511989
> Reason: Q.850;cause=0
> Content-Length: 0
> 
> That pesky 0 for the cause code is making life difficult.
> 
>> On Fri, Apr 16, 2021, at 10:29 AM, Sreekanth Narayanan (sreenara) wrote:
>> Nick,
>> 
>> What's the disconnect cause from the CUBE? 102?
>> 
>> Do you have logs for this call? Would be clear which timers are expiring, causing the problem.
>> debug ccsip message
>> debug ccsip error
>> debug ccsip info
>> 
>> -sreekanth
>> 
>> 
>> From: cisco-voip <cisco-voip-bounces at puck.nether.net> on behalf of Nick Barnett <nick at barnett.email>
>> Sent: Friday, April 16, 2021 6:53 PM
>> To: cisco-voip <cisco-voip at puck.nether.net>
>> Subject: [cisco-voip] Outbound SIP connection failing in CUBE due to some timer... maybe.
>>  
>> Yes, very vague subject. Sorry about that. Some calls to certain wireless carriers on our ITSP connections have started failing. 
>> 
>> Win10 Jabber client (off of 12.5.su3) -> CUBE -> ITSP
>> 
>> The call goes out Lumen, the 401 auth and challenge response are fine, the INVITE is then sent with SDP. We get a TRYING response which we immediately ACK. Up until this point, the entire call flow is NORMAL. 
>> 
>> If we don't receive a 18X response within  7 Seconds, the, the CUBE sends a cancel. Yes, the CUBE.
>> 
>> It appears that the far end is taking too long to send the 18X message. we involved our carrier and they can see the 18X come back a split second later (sometimes), but our side has already closed the connection.
>> 
>> I looked at all of the sip-ua timers and retry settings. nothing adds up to 7 seconds. Most timers are set to 500 msec. I'm not sure where to look? It's not on the sip profile. i tried bumping up the connect, update, info and trying timers (one at a time), but it didn't make any difference. Maybe I was supposed to do something to make sip-ua changes "kick in" like bounce the sip service which I didn't do... not sure on that part.
>> 
>> Please tell me there is something simple I'm missing. Pointers?
>> 
>> Thanks,
>> Nick
>> 
>> 
>> p.s. : some possibly relevant config  and the timers and retries from my sip-ua
>> 
>> retry invite 2
>> retry response 6
>> retry bye 10
>> retry cancel 10
>> retry prack 10
>> retry update 6
>> retry rel1xx 6
>> retry notify 10
>> retry refer 10
>> retry info 6
>> retry register 6
>> retry subscribe 6
>> retry keepalive 6
>> retry options 6
>> timers trying 500
>> timers expires 180000
>> timers connect 500
>> timers connection aging 5
>> timers disconnect 500
>> timers prack 500
>> timers update 500
>> timers rel1xx 500
>> timers notify 750
>> timers refer 500
>> timers hold 2880
>> timers info 500
>> timers register 500
>> timers buffer-invite 0
>> timers keepalive down 30
>> timers keepalive active 120
>> timers dns registrar-cache 3600
>> timers options 500
> 
> 
> Thanks,
> Nick
> 
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