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Re: [PWE3] WG Last Call for draft-ietf-pwe3-endpoint-fast-protection-01 - RFC4447

Stewart Bryant <stbryant@cisco.com> Tue, 05 August 2014 13:38 UTC

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Date: Tue, 05 Aug 2014 14:38:06 +0100
From: Stewart Bryant <stbryant@cisco.com>
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Subject: Re: [PWE3] WG Last Call for draft-ietf-pwe3-endpoint-fast-protection-01 - RFC4447
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>>> [1] This draft is completely based on the PWE3 and the MS-PW
>> architecture. It is also based on RFC 5331 " MPLS Upstream Label Assignment
>> and Context-Specific Label Space". So ideally readers should be familiar with
>> that RFC.
>> As far as I can see context labels have not been introduced
>> into the PWE3 architecture. There is some reference to their use for
>> P2MP PWs, but not in the P2P case. Indeed I think that RFC4447
>> notes explicitly that in the case where the configuration of PWs
>> is signaled by LDP the platform label space must be used. The
>> least that you need to do is to update RFC4447.
>>
> [[Sasha]] yes, RFC 4447 explicitly requires the PW labels to be allocated from the per-platform label space.
> And according to RFC 5331 per-platform label space is a special case of the label context.
However RRC5331 does not update RFC4447, so it must be
assumed that the original definition of per-platform
label space applies to PWs.

- Stewart

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