Change of remote UA IP address during re-INVITE

[Thibault Groisil]

Hi,

We are facing an issue during a re-INVITE dialog, where the remote UA changes its IP address.

We are currently using iOS 15.2-4 on a CISCO 3925 acting as SBC.

Here is the story:

A call is established between the SBC and a local UA.

The SBC sends its re-INVITE message after a while, and the UA answers with a OK message. But inside the OK message the IP address has changed in the "contact" header field and SDP "o" attribute.

However the SBC continues to send RTP packets and SIP messages to the previous IP address; seems it doesn't take into account the change...

Is it normal? If not, what would be the normal way to allow UA IP address modification in re-INVITE dialog (according to RFC 3264)

Thanks for your help.

Thibault

[paolo bevilacqua]

Update IOS.

If still trouble, contact the TAC.

[Ayodeji Okanlawon]

Thibault,

Does the UA update the ip address in its connection parameter? or is it just the contact header that is updated. Re-INVITE is documented in RFC6141 and in all the examples, it is the connection parameter that reflects a change in the IP address..Cisco SBC will send media to the ip address specificied in the connection parameter

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