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Request: INVITE “address of SIP client”, with session description

0
  1. SIP client sends request to SBC.
  2. "unknown" IP (I'm waiting for the answer from my collaborator what's that IP) sends request to P-CSCF.

Question:

When sending request INVITE to SBC, SIP client tells him its SIP address, right? When sending request INVITE to P-CSCF, does this "unknown" IP know SIP address or wants it?

(I suspect this "unknown" IP belongs to device from Ericsson TSP applications "box" (regarding to my IMS reference paper), where HSS, I-CSCF, S-CSCF, P-CSCF etc. are.)

Maybe a little confused question (and thinking)...but I'm dilemma.

asked 30 Apr '11, 15:58

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wired
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9 2.304519s SIP client Session Border Controller (SBC) SIP/SDP 917 Request: INVITE sip:[email protected]_domain.net, with session description

13 2.311316s 10.253.70.197 P-CSCF SIP/SDP 1105 Request: INVITE sip:[email protected]_domain.net, with session description

These packets are parts of prepaid call from SIP client do circuit switched domain.

(30 Apr '11, 16:01) wired

I'm not sure I understand the question, on IP level the client's (UE) INVITE will go to the IP of the SBG:s access side, on the core side the sourc IP will be that of the SBG:s core interface. e.g The INVITE going to P-CSCF will have the IP address of SBG core. /Anders

(30 Apr '11, 16:58) Anders ♦

That's ok, fine explanation.

But in Wireshark info (about packet) there's a sip:[email protected]_domain.net (in real it's actual SIP address of client), so if I understand clearly, INVITE going from 10.253.70.197 to P-CSCF, includes this SIP address?

(30 Apr '11, 23:44) wired

One Answer:

0

If it helps, here you can see where this IP lies.

alt text

answered 30 Apr '11, 17:01

wired's gravatar image

wired
44131417
accept rate: 9%