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Re: [bess] draft-rosen-bess-pta-flags

Jeff Tantsura <jeff.tantsura@ericsson.com> Thu, 12 February 2015 06:18 UTC

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From: Jeff Tantsura <jeff.tantsura@ericsson.com>
To: Eric C Rosen <erosen@juniper.net>, "bess@ietf.org" <bess@ietf.org>
Thread-Topic: [bess] draft-rosen-bess-pta-flags
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Date: Thu, 12 Feb 2015 06:18:00 +0000
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Subject: Re: [bess] draft-rosen-bess-pta-flags
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Very useful, support!

Cheers,
Jeff




-----Original Message-----
From: Eric C Rosen <erosen@juniper.net>
Date: Wednesday, February 11, 2015 at 12:27 PM
To: "bess@ietf.org" <bess@ietf.org>
Cc: "erosen@juniper.net" <erosen@juniper.net>
Subject: [bess] draft-rosen-bess-pta-flags

>The PMSI Tunnel attribute defined in RFC6514 contains a "flags" octet.
>RFC 6514 only defines a single one-bit flag, "Leaf Information
>Required".  However, the next revision of
>draft-dolganow-l3vpn-mvpn-expl-track is probably going to specify the
>use of a second bit from the flags octet.  And
>draft-rabadan-bess-evpn-optimized-ir specifies the use of 4 bits from
>the flags octet.  Since this particular octet only contains eight bits,
>it is probably a good idea to have an IANA registry for it, to minimize
>the chance that two different drafts will try to allocate the same bit
>for different purposes.
>
>Thus the trivial draft draft-rosen-bess-pta-flags, which, if progressed
>to RFC, would establish this registry.
>
>Given the small number of possible allocations, the proposed
>registration procedure is "Standards Action", which automatically
>includes the possibility of "early allocation".
>
>It might also be worth thinking about whether the interpretation of the
>flags octet should be dependent on the type of route to which the PMSI
>Tunnel attribute is attached.  However, that complication is not
>currently suggested in the draft.
>
>Comments?
>
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