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List:       sip-implementors
Subject:    Re: [Sip-implementors] more 404-Not Found calls
From:       Daniel Pagan <dpagan () fidelus ! com>
Date:       2014-05-01 16:14:15
Message-ID: A4F4BEEAD515F947AC82D086A78C70F660A3118C () NYC-EXCH-MB01 ! fidelus ! com
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My suggestion would be to review detailed CCM traces and ccsip debug output from your \
CUBE. The examples you listed below seem pretty accurate, but getting a concrete \
answer about why you receive a 404 when dialing a valid telephone number would only \
be possible through detailed CCM SDI/SDL traces and debugs off the gateway. With so \
many variables that can alter your call between CUCM and CUBE, SDI/SDL traces and \
ccsip debugging will provide you with accurate data about what's occurring within \
your environment.

The high level steps I would take after setting CCM traces to detailed and recreating \
the 404:

1. Use Notepad++ to open your SDI/SDL traces.
2. Use a style token to highlight your Call-ID headers for your test call
3. Follow related SIP events until you find your 404
4. Review SDI/SDL signaling that's printed in traces just before the 404 is \
generated. Do you see a failure on LBM (location bandwidth manager) bandwidth \
reservation? Do you see Digit Analysis returning with a "No Potential Matches" in the \
DA response? Do you see the 404 being received by CUCM from CUBE? If so then you'll \
have to review output of ccsip debugging off CUBE to see if the 404 is being \
generated by the ITSP or your CUBE router.  5. If generated by CUBE then I would \
place another test call while running a debug of the ccapi to determine what \
dial-peers are being match, if there's a match failure, incorrect/misconfigured sip \
profiles or voice translation rules, etc.

Obviously this is a very high level description and the methods used to review CCM \
traces is dependent on the number of CUCM nodes, where your devices are registered, \
and if you're on CUCM 9x or on a version below, etc.. 

I hope this helps.

- Daniel

-----Original Message-----
From: sip-implementors-bounces@lists.cs.columbia.edu \
                [mailto:sip-implementors-bounces@lists.cs.columbia.edu] On Behalf Of \
                Mahudeswaran A
Sent: Sunday, April 27, 2014 3:57 AM
To: sip-implementors-owner@lists.cs.columbia.edu; discussion@sipforum.org; \
                sip-implementors@lists.cs.columbia.edu
Subject: [Sip-implementors] more 404-Not Found calls

Hello All,

Would like to clarify under what circumstances UAC gets "404-NOT \
Found---Reason=unallocated number"  for an INVITE request; Sip trunk established \
between UAC & Cisco call manager;

Call path:
UAC -----> cisco cm ----> voice gateway ------> (ITSP)

We captured wireshark traces for 404-Not Found messages and some phone numbers are \
actually invalid numbers and some phone numbers are valid; The INVITE request having \
timeout set as 'SIP header ==Expires: 180'. This is as suggested & being asked us to \
put in here for the calls to work; We did faced more calls getting 404-NotFound \
response.

So trying to find what are all the possible scenarios the cisco cm could send the \
404-NotFound error response; Some reason like

1.       The dialling number itself is invalid and service provider plays the message \
saying "like...number is invalid.."

2.       Due to not enough bandwidth between voice gateway & ITSP

3.       Due to not enough bandwidth between cisco cm & voice gateway --- (This is \
least option if all the ports in gateway are busy.... The cm should send busy instead \
of 404-NotFound..)

4.       Comments from other team says the UAC is sending something wrong here \
because of which more 404-NotFound; --- randomly we picked some 404-NotFound numbers \
and tested by manual dialling and found those were valid numbers.

Any other reasons for 404-NotFound?? -- How to troubleshoot these issues;

Regards
Mahu

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