MPLS TE + IGP,BGP Convergence timers

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Jun 19th, 2009
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In case I am implementing MPLS TE FRR using RSVP hellos in my mpls backbone for speedy convergence against link/node failures. Do I still need to teak my IGP,BGP & LDP convergence timers or make my IGP,BGP,LDP to converge based on trigger from BFD in addition to implementation of MPLS TE FRR.

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Laurent Aubert Fri, 06/19/2009 - 05:34
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Tuning IGP and BGP will help to improve convergence in other scenarios:

- Lost of a primary PE-CE link

- Lost of a primary PE

- Lost of a core link not protected by MPLS TE FRR.

FRR allows you to have a very fast data-plane convergence without waiting for your control-plane converge.

There is no need to tune LDP timers because by default the router is in liberal label retention mode meaning it stores the labels even if the LSR is not the IGP next-hop.




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