07-11-2016 07:01 PM - edited 03-17-2019 07:29 AM
Hi there,
i have a CUCM sending SIP OPTIONS PING to a CUBE,
when CUBE reponds , it sends like an SDP back with all fax capabilities and not sure where this is coming from and why...? I want to remove it:
Jul 12 00:48:02.032: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Received:
OPTIONS sip:10.10.10.254:5060 SIP/2.0
Via: SIP/2.0/TCP 10.20.20.253:5060;branch=z9hG4bK1cf718012ca2
From: <sip:10.20.20.253>;tag=1153190595
To: <sip:10.10.10.254>
Date: Tue, 12 Jul 2016 14:47:05 GMT
Call-ID: 7ed74000-785102e9-1cf2-fd011a9d@10.20.20.253
User-Agent: Cisco-CUCM9.1
CSeq: 101 OPTIONS
Contact: <sip:10.20.20.253:5060;transport=tcp>
Max-Forwards: 0
Content-Length: 0
Jul 12 00:48:02.036: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
SIP/2.0 200 OK
Via: SIP/2.0/TCP 10.20.20.253:5060;branch=z9hG4bK1cf718012ca2
From: <sip:10.20.20.253>;tag=1153190595
To: <sip:10.10.10.254>;tag=4C506DEC-102B
Date: Tue, 12 Jul 2016 00:48:02 GMT
Call-ID: 7ed74000-785102e9-1cf2-fd011a9d@10.20.20.253
Server: Cisco-SIPGateway/IOS-15.2.4.M4
CSeq: 101 OPTIONS
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER
Allow-Events: telephone-event
Accept: application/sdp
Supported: 100rel,timer,resource-priority,replaces,sdp-anat
Content-Type: application/sdp
Content-Length: 379
v=0
o=CiscoSystemsSIP-GW-UserAgent 1549 4471 IN IP4 10.10.10.254
s=SIP Call
c=IN IP4 10.10.10.254
t=0 0
m=audio 0 RTP/AVP 18 0 8 9 4 2 15
c=IN IP4 10.10.10.254
m=image 0 udptl t38
c=IN IP4 10.10.10.254
a=T38FaxVersion:0
a=T38MaxBitRate:9600
a=T38FaxRateManagement:transferredTCF
a=T38FaxMaxBuffer:200
a=T38FaxMaxDatagram:320
a=T38FaxUdpEC:t38UDPRedundancy
07-11-2016 10:14 PM
that is what SIP options do; query capabilities. because they are such lean packets, they are very suitable as a way to verify 'keepalive; status across for instance a CUCM sip trunk.
what exactly is the issue you are trying to fix by wanting to remove these capabilities?
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