Document: draft-ietf-sipping-nat-scenarios-08
Reviewer: Jerry Yin [jerry_yin@mitel.com]
Review Date: 5/05/2008
Review Due: 5/23/2008
Review Type: WGLC

Summary: Almost ready; issue/nits


Comments:
---------

Editorial errors:
1. There are two Figure 6 in page 12 and 14 respectively, and reference errors to the figures accordingly.
2. Page 13: 'connectionID", do you mean 'reg-id'?
3. Missing 'outbound' tag in the Supported header in all examples according to the Outbound draft.
4. It seems the GRUU parameter in the INVITE example on page 19 does not match the latest GRUU draft (version 14). Specifically, I don't see the 'grid=' tag in the latest GRUU draft. One suggestion is to add the 200 OK response example with GRUU tags in section 4.1.2 (page 17), so that the reader know how the GRUU tag is copied to the INVITE requests.

Technical problem:
In section 4.1.4, I think the INVITE from Proxy to the Client behind the NAT is missing the Record-Route header. Without the RR header, the re-Invite or any other request from the client (Callee behind the NAT) will go directly to the caller's 'Contact' header, not the Proxy.