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Re: [rtcweb] Meaning of SHOULD support/use interleaving

Christer Holmberg <christer.holmberg@ericsson.com> Tue, 28 October 2014 13:51 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Michael Tuexen <Michael.Tuexen@lurchi.franken.de>
Thread-Topic: [rtcweb] Meaning of SHOULD support/use interleaving
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Date: Tue, 28 Oct 2014 13:51:07 +0000
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Cc: "rtcweb@ietf.org" <rtcweb@ietf.org>
Subject: Re: [rtcweb] Meaning of SHOULD support/use interleaving
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Hi,

>> I am not suggesting different flavors - I am suggesting to make the usage of interleaving optional. Other SCTP features are also optional (including reliability, ordering etc).
>
> Where are these things optional? According to
> https://tools.ietf.org/html/draft-ietf-rtcweb-data-channel-12#section-6.1
> an implementation MUST implement PR-SCTP and the support of the FORWARD-TSN chunk will be negotiated similar to the NDATA chunk. I don't see a difference, especially not if we move to MUST support NDATA.

For example, section 6.1 says:

	"The partial reliability extension defined in [RFC3758] MUST be supported."

However, in CLUE we say that a CLUE entity MUST NOT *use* the extension, as all CLUE messages are required to be sent reliably.

Regards,

Christer

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