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Re: [rtcweb] No-Bundle in just one peer

Christer Holmberg <christer.holmberg@ericsson.com> Tue, 12 November 2013 00:54 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Justin Uberti <juberti@google.com>, Lorenzo Miniero <lorenzo@meetecho.com>
Thread-Topic: [rtcweb] No-Bundle in just one peer
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Date: Tue, 12 Nov 2013 00:54:49 +0000
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] No-Bundle in just one peer
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Hi,

Justin is correct.

At one point we made a decision, that either both endpoints do BUNDLE, or no endpoint does BUNDLE.

A, not supporting BUNDLE, may not like receiving an SDP Answer from B with a shared address assigned to multiple m- lines.

Regards,

Christer


Lähettäjä: rtcweb-bounces@ietf.org [mailto:rtcweb-bounces@ietf.org] Puolesta Justin Uberti
Lähetetty: 11. marraskuuta 2013 23:04
Vastaanottaja: Lorenzo Miniero
Kopio: rtcweb@ietf.org
Aihe: Re: [rtcweb] No-Bundle in just one peer

No, B cannot BUNDLE if A is not BUNDLEing. There are a number of corner cases where things don't work right in the situation described above.

On Mon, Nov 11, 2013 at 10:17 AM, Lorenzo Miniero <lorenzo@meetecho.com<mailto:lorenzo@meetecho.com>> wrote:
Il giorno Mon, 11 Nov 2013 19:12:01 +0100
Iñaki Baz Castillo <ibc@aliax.net<mailto:ibc@aliax.net>> ha scritto:

> Hi,
>
> In case peer A sends a SPD without Bundle support (so it needs to
> receive incoming tracks in separate ports and send tracks from
> separate ports) does it aslo mean that peer B must not use Bundle? Or
> could peer A use two local ports (no Bundle) to send/receive tracks
> to/from a single port in peer B?
>
> Thanks a lot.
>
> --
> Iñaki Baz Castillo
> <ibc@aliax.net<mailto:ibc@aliax.net>>

Hi Iñaki,

not sure what the spec currently mandates, but this works already in
existing implementations. Peer A just needs to do the ICE and DTLS
dance twice from its two ports towards the single port in B (twice or
more, in case you're not muxing RTCP either).

Lorenzo
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