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[mpls] ahRE: draft-bashandy-mpls-ldp-bgp-frr-00 motivation

<stephane.litkowski@orange.com> Tue, 27 March 2012 08:20 UTC

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From: stephane.litkowski@orange.com
To: Ilya Varlashkin <ilya@nobulus.com>, IETF MPLS <mpls@ietf.org>
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Subject: [mpls] ahRE: draft-bashandy-mpls-ldp-bgp-frr-00 motivation
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Ilya,

The best current available mechanism is BGP PIC Edge that relay on IGP convergence to detect that remote PE is no longer reachable : PIC Edge result mainly depends on how fast your IGP is converging (sub sec or more).

Ahmed solution is an FRR solution so doesn't rely on convergence. As soon as a P router detects that the link to the protected PE fails, it will switch (using pre-programmed backup NHLFE), so there you are in FRR numbers ... 50msec - 100msec depending of implementation ...

Clearly the solution is today complex, and I hope it could be a bit simplified :)

Regards,

Stephane


-----Message d'origine-----
De : mpls-bounces@ietf.org [mailto:mpls-bounces@ietf.org] De la part de Ilya Varlashkin
Envoyé : mardi 27 mars 2012 10:08
À : IETF MPLS
Objet : [mpls] draft-bashandy-mpls-ldp-bgp-frr-00 motivation

Ahmed, Kamran,

as first expressed at the mic during MPLS session, I'd like to ask you for a clarification of the motivation behind the draft. You say that this draft will provide faster switch-over/fail-over time compare to anything already existing today. Do you have some numbers for comparison?

/iLya

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