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[Simple] IMDN: Do we need record-route?



Hi:

First, I want to express my support for the current version of the IMDN draft, I think it is going in the right direction. Especially, it is easier to read than earlier versions.

The draft defines the Original-To, IMDN-Route, and IMDN-Record-Route CPIM headers. I see the need for this CPIM headers when SIP is the transport protocol. However, I don't find a reason for them if MSRP is the transport protocol. I think endpoints will send IMDNs through the same MSRP logical session where the IM was received. If at the other side there is an intermediary, for sure there is some logic on top that is able to route back to the original sender.

So is there a usage of these headers in MSRP?

BR,

       Miguel
--
Miguel A. Garcia           tel:+358-50-4804586
sip:miguel.garcia at neonsite.net
Nokia Research Center      Helsinki, Finland

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