Hello!
We have OCS 2007 R2 deployed in our organization.
We have telephony integration by SIP Trunk with CISCO Call Manager (CCM) 4.3.X, and it worked
fine.. But month ago an interesting issue appeared: users become getting errors when making outbound calls to PSTN (witch goes
through CCM) the text of the error from
Front-End
An attempt to route to a gateway failed.
Could not route to Gateway ocs-med01-s8k.softline.main:5061, the attempt failed with response code: Timeout.
Failure occurrences: 55, since 6/11/2010 2:18:39 PM.
Cause: A gateway failed to respond to a request within allotted time or was unable to route the request due to some error.
Resolution:
Check whether the specified gateway is up and is properly configured.
"It can be from five to ten times a day in a different time, so no systematicity"
On the Mediation Server we have no errors at all. We have nagious configured to ping and telnet mediation server on services ports (no errors from it).
Mediation server have 2 interfaces : 10.3.0.183 - To OCS & 10.3.0.184 - To CCM(10.3.1.10)
When I checked logs from mediation (when making outgoing call ) I saw that packets
from 10.3.0.183 go to 10.3.1.10
Is it normal??
When I tried logically separate these interfaces in different VLANs - all calls to PSTN fails
Below you can find logs from Mediation when users makes outbound call and it fails
TL_INFO(TF_PROTOCOL) [5]03F4.08F0::06/21/2010-09:10:45.264.000183a4 (S4,SipMessage.DataLoggingHelper:sipmessage.cs(531))
>>>>>>>>>>>>Outgoing SipMessage c=[<SipTcpConnection_1B57174>],
10.3.0.183:59117->10.3.1.10:5070 - I think that it must go from 10.3.0.184
INVITE sip:0973662036@10.3.1.10;user=phone SIP/2.0
FROM: <sip:XXXX@ocs-MED01-s8k.softline.main;user=phone>;epid=224AC0267C;tag=352f4d9390
TO: <sip:YYYYY@10.3.1.10;user=phone>
CSEQ: 1005 INVITE
CALL-ID: dc9b4b29-e79d-4c1f-a838-fbe17428984d
MAX-FORWARDS: 70
VIA: SIP/2.0/TCP 10.3.0.183:59117;branch=z9hG4bK88ace372
CONTACT: <sip:ocs-MED01-s8k.softline.main:5060;transport=Tcp;maddr=10.3.0.183;ms-opaque=0420ec557f993770>
CONTENT-LENGTH: 323
SUPPORTED: 100rel
USER-AGENT: RTCC/3.5.0.0 MediationServer
CONTENT-TYPE: application/sdp; charset=utf-8
ALLOW: ACK
Allow: CANCEL,BYE,INVITE,PRACK,UPDATE
v=0
o=- 1408 1 IN IP4 10.3.0.183
s=session
c=IN IP4 10.3.0.183
b=CT:1000
t=0 0
m=audio 60390 RTP/AVP 97 101 13 0 8
c=IN IP4 10.3.0.183
a=rtcp:60391
a=label:Audio
a=rtpmap:97 RED/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=rtpmap:13 CN/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=ptime:20
------------EndOfOutgoing SipMessage
After that message Mediation have incoming
SIP/2.0 100 Trying
<<<<<<<<<<<<Incoming SipMessage c=[<SipTcpConnection_1B57174>],
10.3.0.183:59117<-10.3.1.10:5070
SIP/2.0 503 Service Unavailable
FROM: <sip:XXX@ocs-MED01-s8k.softline.main;user=phone>;epid=224AC0267C;tag=352f4d9390
TO: <sip:YYYYY@10.3.1.10;user=phone>;tag=17352260
CSEQ: 1005 INVITE
CALL-ID: dc9b4b29-e79d-4c1f-a838-fbe17428984d
VIA: SIP/2.0/TCP 10.3.0.183:59117;branch=z9hG4bK88ace372
ALLOW-EVENTS: telephone-event
CONTENT-LENGTH: 0
DATE: Mon, 21 Jun 2010 09:11:29 GMT
------------EndOfIncoming SipMessage
So I have no ideas what can cause these issues..
My assumptions was that the problem can be if codecs that use Mediation and CCM are different, but they are OK.
Or if some troubles with SIP Trunk, but if they
were all calls failed..
I can expect that the trouble occurs when making outbound calls the Mediation server talks to CCM from IP 10.3.0.183 instead of 10.3.0.184
Please help me to resolve this problem!
Appreciate your help,
Denis Golovatyuk
