Hi,
Fig was missing in the previous mail. Sorry for inconvience.
Manju
-----Original Message-----
From: Manjunath Warad [mailto:[EMAIL PROTECTED]
Sent: Wednesday, February 01, 2006 2:35 PM
To: 'Anshuman Rawat'; '[email protected]'
Subject: RE: [Sip-implementors] Record-Route with same field values
Hi,
After analysing the message, I guess the message is spiralled in the
proxy. Since the 2 branch are different inserted by proxy, I came to such
conclusion.
Via: SIP/2.0/UDP 69.90.155.70;branch=z9hG4bK0ceb.85584e86.0
Via: SIP/2.0/UDP 69.90.155.70;branch=z9hG4bK0ceb.75584e86.0
Via: SIP/2.0/UDP 172.25.21.217:5060;branch=z9hG4bK283970mxu;rport=30719
Request might have traversed in this way,
IP Phone A Proxy(fwd.pulver.com) Cisco7960
This proxy adds two
RR and two Via.
But I dont know for what reason the request spiralled in the proxy.
Regards,
Manju
-----Original Message-----
From: [EMAIL PROTECTED] [
<mailto:[EMAIL PROTECTED]>
mailto:[EMAIL PROTECTED] On Behalf Of Anshuman Rawat
Sent: Wednesday, February 01, 2006 11:16 AM
To: [email protected]
Subject: [Sip-implementors] Record-Route with same field values
Hi,
I have 2 IP phones (1 Cisco 7960 & another IP phone, say IP phone A)
registered with fwd.pulver.com. When calling Cisco from IP phone A, I
noticed that the INVITE which Cisco received that 2 equal Record-Route
values. It probably is 'cause of the fact that the INVITE contained 2 VIA
field values with same IP address but different branch parameters (see
bolded text in 2nd INVITE below).
I can't understand why the proxy (fwd.pulver.com) inserted 2 VIA header
fields. Also, would there be any impact on routing if Record-Route has 2
identical field values? Any explanation for this behavior?
Thanks in advance,
Anshuman
PS:
1. First INVITE message below is from IP phone A to proxy (fwd.pulver.com).
Second INVITE is from proxy to Cisco.
2. When calling from Cisco to IP phone A, the proxy inserts only one VIA
header, as I was expecting (INVITE message not pasted here).
INVITE sip:[EMAIL PROTECTED] SIP/2.0
To: <sip:[EMAIL PROTECTED]>
From: Staka <sip:[EMAIL PROTECTED]>;tag=200340ghj
Call-ID: 210950h9!
CSeq: 3 INVITE
Via: SIP/2.0/UDP 172.25.21.217:5060;branch=z9hG4bK283970mxu;rport
Allow: ACK,BYE,CANCEL,INVITE,INFO,NOTIFY,OPTIONS,PRACK,REFER,UPDATE
Contact: sip:[EMAIL PROTECTED]
Supported: 100rel,replaces,precondition
Accept: application/sdp,application/cpim-pidf+xml
Expires: 3600
User-Agent: Conexant-User-Agent
Route: <sip:fwd.pulver.com:5060;lr>
Accept-Language: en
Content-Type: application/sdp
Content-Length: 196
Content-Language: en
Content-Disposition: session
Max-Forwards: 70
v=0
o=731346 550 550 IN IP4 172.25.21.217
s=SIP Phone
c=IN IP4 172.25.21.217
t=0 0
m=audio 5000 RTP/AVP 0 8 18
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=sendrecv
INVITE sip:[EMAIL PROTECTED]:5060 SIP/2.0
Record-Route: <sip:[EMAIL PROTECTED];ftag=200340ghj;lr=on>
Record-Route: <sip:[EMAIL PROTECTED];ftag=200340ghj;lr=on>
To: <sip:[EMAIL PROTECTED]>
From: Staka <sip:[EMAIL PROTECTED]>;tag=200340ghj
Call-ID: 210950h9!
CSeq: 3 INVITE
Via: SIP/2.0/UDP 69.90.155.70;branch=z9hG4bK0ceb.85584e86.0
Via: SIP/2.0/UDP 69.90.155.70;branch=z9hG4bK0ceb.75584e86.0
Via: SIP/2.0/UDP 172.25.21.217:5060;branch=z9hG4bK283970mxu;rport=30719
Allow: ACK,BYE,CANCEL,INVITE,INFO,NOTIFY,OPTIONS,PRACK,REFER,UPDATE
Contact: sip:[EMAIL PROTECTED]:5060
Supported: 100rel,replaces,precondition
Accept: application/sdp,application/cpim-pidf+xml
Expires: 3600
User-Agent: Conexant-User-Agent
Accept-Language: en
Content-Type: application/sdp
Content-Length: 196
Content-Language: en
Content-Disposition: session
Max-Forwards: 68
v=0
o=731346 550 550 IN IP4 172.25.21.217
s=SIP Phone
c=IN IP4 172.25.21.217
t=0 0
m=audio 5000 RTP/AVP 0 8 18
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=sendrecv
Regards,
Anshuman S. Rawat
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