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Re: [mpls] MPLS_RT review of draft-mirsky-mpls-residence-time-06.txt

Yaakov Stein <yaakov_s@rad.com> Thu, 28 May 2015 08:41 UTC

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From: Yaakov Stein <yaakov_s@rad.com>
To: "Osborne, Eric" <eric.osborne@level3.com>
Thread-Topic: MPLS_RT review of draft-mirsky-mpls-residence-time-06.txt
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Date: Thu, 28 May 2015 08:41:11 +0000
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Cc: "mpls@ietf.org" <mpls@ietf.org>
Subject: Re: [mpls] MPLS_RT review of draft-mirsky-mpls-residence-time-06.txt
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> General question: does RTM work over LAGs?  They're a flavor of ECMP in some respects.  If not, that needs to be spelled out somewhere.

> It might be worth spending a few lines in the introduction talking about who might want to use this and what sort of restrictions it places on a network design.

All the caveats that were discussed in the context of the TICTOC draft apply here as well.

In particular, all packets of timing flows must follow the same path, thus ruling out LAG, ECMP, entropy labels, etc.
Protection switching must also be avoided, since undetected delay changes are more detrimental than not receiving timing packets and going into holdover.

Y(J)S

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