Re: [mpls] comments on draft-kompella-mpls-special-purpose-labels-02

Eric Rosen <erosen@cisco.com> Thu, 30 May 2013 18:53 UTC

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From: Eric Rosen <erosen@cisco.com>
To: Kireeti Kompella <kireeti.kompella@gmail.com>
In-reply-to: Your message of Fri, 24 May 2013 15:00:34 -0700. <37E234C8-8167-4375-8EE2-693E3041140A@gmail.com>
Date: Thu, 30 May 2013 14:53:05 -0400
Message-ID: <19588.1369939985@erosen-linux>
Cc: MPLS <mpls@ietf.org>
Subject: Re: [mpls] comments on draft-kompella-mpls-special-purpose-labels-02
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Eric>  I think it would be better to have a much smaller piece of the label
Eric>  space to be allocated under the "standards action" policy.

Kireeti> Okay, will reduce.  Question is, what to do with the rest of the
Kireeti> label space: make reserved, or FCFS (or both)?  If FCFS, how big? 

I think the range 16-63 should be ample for the "Standards Action" range,
assuming that we don't really want to ever have too many of these.  If the
WG thinks this range is too small, perhaps 16-255.

Usually I like the FCFS policy, but I don't think FCFS is appropriate for
special purpose labels, so I would favor making the rest of the space
reserved.

I see the draft creates an "experimental" range 1048560-1048575.  Was any
consideration given to having a Standards Action range of something like
16-240 and an experimental range of 241-255?  Then all the possible special
purpose label values would be in a small and contiguous number space.