No,

"Via: SIP/2.0/UDP
10.32.140.122:5060;rport;branch=z9hG4bK-38-dc39-6b4deb27;rport=5060"

This via with rport=5060 is the one generated by server on b-side . and
we are talking about cancel the dialog on a-side.

The via on a-side is :

Via: SIP/2.0/UDP
10.32.140.122:5060;rport;branch=z9hG4bK-38-dc39-6b4deb27


CANCEL sip:[email protected];transport=udp SIP/2.0
From: "AHTV Ric
1"<sip:[email protected]>;tag=13e7858-7a8c200a-13c4-5506-38-3625c56-38
To: <sip:[email protected];transport=udp>
Call-ID: 14800c0-7a8c200a-13c4-5506-38-1b91bc30-38
CSeq: 1 CANCEL
Via: SIP/2.0/UDP
10.32.140.122:5060;rport;branch=z9hG4bK-38-dc39-6b4deb27
Max-Forwards: 70
Supported: 100rel,timer,replaces
Content-Length: 0


And it is exactly the same via sent on invite (a-side)

INVITE sip:[email protected];transport=udp SIP/2.0
From: "AHTV Ric
1"<sip:[email protected]>;tag=13e7858-7a8c200a-13c4-5506-38-3625c56-38
To: <sip:[email protected];transport=udp>
Call-ID: 14800c0-7a8c200a-13c4-5506-38-1b91bc30-38
CSeq: 1 INVITE
Via: SIP/2.0/UDP
10.32.140.122:5060;rport;branch=z9hG4bK-38-dc39-6b4deb27
Allow:
INVITE,ACK,BYE,CANCEL,OPTIONS,REFER,INFO,MESSAGE,NOTIFY,PRACK,UPDATE
Priority: normal
Subject: calltype=standard
Max-Forwards: 70
Supported: 100rel,timer,replaces
Contact: <sip:[email protected]:5060;transport=udp>
Content-Type: application/sdp
Content-Length: 355

v=0
o=200 139924350 1597803496 IN IP4 10.32.140.122
s=ADI VoIP Phone
c=IN IP4 10.32.140.122
b=AS:1024
t=0 0
m=audio 8000 RTP/AVP 8 18 4 0 101
a=fmtp:101 0-15
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=rtpmap:4 G723/8000
a=rtpmap:0 PCMU/8000
a=fmtp:18 annexb=no
a=fmtp:4 annexa=no
a=ptime:40
a=sendrecv
a=rtpmap:101 telephone-event/8000





-----Original Message-----
From: ext Brett Tate [mailto:[email protected]] 
Sent: Wednesday, April 20, 2011 9:49 AM
To: Pavesi, Valdemar (NSN - US/Irving);
[email protected]
Subject: RE: [Sip-implementors] SIP request Cancel Issue

> There are no syntax problem.

I disagree.  The response Via entry returned by server contains two
rport parameters.

Via: SIP/2.0/UDP
10.32.140.122:5060;rport;branch=z9hG4bK-38-dc39-6b4deb27;rport=5060


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