Re: [Isis-wg] [Bier] BAR field length in draft-ietf-bier-isis-extensions and draft-ietf-bier-ospf-extensions

IJsbrand Wijnands <ice@cisco.com> Tue, 20 February 2018 01:15 UTC

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From: IJsbrand Wijnands <ice@cisco.com>
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Date: Mon, 19 Feb 2018 17:15:29 -0800
Cc: BIER WG <bier@ietf.org>, "isis-wg@ietf.org list" <isis-wg@ietf.org>
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To: Alia Atlas <akatlas@gmail.com>
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Subject: Re: [Isis-wg] [Bier] BAR field length in draft-ietf-bier-isis-extensions and draft-ietf-bier-ospf-extensions
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Alia,

> An architectural argument can't also limit itself to the drafts in the title.
> 
> If it sounded like the IANA registry was suggested as separate for BIER OSPF  and BIER ISIS, then your attempt to reframe the conversation might be reasonable.  Let me clarify - I see no current reason for an OSPF BAR registry and an ISIS BAR registry; it would just be a BAR registry.  Perhaps
> that clarification is a good reason to get the IANA registry included in the next update?

There is no reason for an individual BIER OSPF and BIER ISIS registry. The point is to align with what ever ISIS and OSPF are using to identify the algorithm.

> The routing layer is separate from the BIER layer.  The BAR is for the BIER layer.

The underlay is separate from the BIER layer, and each underlay can carry BIER specific information that is needed for for BIER to make the selection.

Thx,

Ice.