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New Member

MPLS VPN fast converge

Hello:

Is there a good way to improve MPLS VPN reconverge? it seems I have problem with LDP.

mainly between P or PE routers

thx,

4 REPLIES
Bronze

Re: MPLS VPN fast converge

Have you already tried protecting you LDP sessions? This of course assumes that you have a redundant path available from your pe to the p routers.

mpls ldp session protection [vrf vpn-name] [for acl] [duration seconds]

You also need "mpls ldp discovery targeted-hello accept" on the other router.

Another possibility would be to use MPLS TE tunnels with FRR and run LDP over those tunnels (LDP over RSVP) so protect your LDP traffic. Although it would work, its a bit more complex solution but TE does offer the best recovery times for traffic.

GL

-Rob

New Member

Re: MPLS VPN fast converge

thanks Rob, I thought that is for tunnel on P to P..

Cisco Employee

Re: MPLS VPN fast converge

James,

Can you explain what kind of problem you have with LDP between the P and PE routers?

Regards

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México 
Paseo de la Reforma 222 Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
New Member

Re: MPLS VPN fast converge

Hi, Hritter:

when I use auto-tunnel pri and back, even though I use POS sdh I still see some packet loss over MPLS VPN, and find out auto-tunnel Te for MPLS VPN converge is much slower than tunnel backup, but it is very tedious to manually configure backup tunnels.

thx,

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