[MMUSIC] draft-ietf-mmusic-rtsp-nat-14 review
Ari Keranen <ari.keranen@nomadiclab.com> Wed, 05 December 2012 21:22 UTC
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Date: Wed, 05 Dec 2012 23:22:04 +0200
From: Ari Keranen <ari.keranen@nomadiclab.com>
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Cc: mmusic <mmusic@ietf.org>
Subject: [MMUSIC] draft-ietf-mmusic-rtsp-nat-14 review
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Hi, I reviewed the draft-ietf-mmusic-rtsp-nat-14 and I think the document is in pretty good shape and ready to move forward. Some (mostly editorial) comments to consider: 3. Solution Overview The client then installs the STUN servers on each of the local candidates transport addresses it has gathered I would rather say "The client then prepares to act as a STUN server on each [...]" If the server has a public IP address, then a single candidate per address family In some cases (e.g., certain ISPs, I've heard) even "public" IP address does not mean you're not behind a NAT. Maybe it's better to say here "If the server is not behind a NAT". Same issue in step 8. If the server has a public IP address with a single candidate per media stream, component and address family, then the server may be configured to not initiate connectivity checks. This is the "ICE-RTSP", right? Maybe one (small) subsection defining this "feature" would make sense. Now it's a bit trickled around in this section, sec 4.8.1, 5.4, etc. For someone not familiar with ICE-RTSP, it looks like you're talking about ICE lite. the NAT need to be refreshed by the client to server traffic provided by the STUN keep-alive. s/keep-alive/keep-alive mechanism/ (or messages). Also in section 5.11. 5.7. Client to Server ICE Connectivity Check The client receives the SETUP response and learns the candidate address to use for the connectivity checks. s/address/addresses/ (right?) Aggressive nomination SHALL be used with RTSP. This doesn't have the negative impact that it has in offer/answer as media playing only starts after issuing a PLAY request. But it does have the downside of possibly selecting a lower-priority pair due to single dropped (e.g., due to congestion) connectivity check message for a higher priority pair. That said, probably SHALL is appropriate here, just wanted to make sure the implications are understood. 5.12. Re-SETUP If the client decides to change any parameters related to the media stream setup Could clarify (again) here that we talk about ICE parameters. Cheers, Ari
- [MMUSIC] draft-ietf-mmusic-rtsp-nat-14 review Ari Keranen
- Re: [MMUSIC] draft-ietf-mmusic-rtsp-nat-14 review Magnus Westerlund
- Re: [MMUSIC] draft-ietf-mmusic-rtsp-nat-14 review Magnus Westerlund
- Re: [MMUSIC] draft-ietf-mmusic-rtsp-nat-14 review Ari Keranen
- Re: [MMUSIC] draft-ietf-mmusic-rtsp-nat-14 review Ari Keranen
- Re: [MMUSIC] draft-ietf-mmusic-rtsp-nat-14 review Magnus Westerlund
- Re: [MMUSIC] draft-ietf-mmusic-rtsp-nat-14 review Ari Keranen
- Re: [MMUSIC] draft-ietf-mmusic-rtsp-nat-14 review Magnus Westerlund
- Re: [MMUSIC] draft-ietf-mmusic-rtsp-nat-14 review Ari Keranen