[c-nsp] Backup methods in MPLS networks

[Kim Onnel]

I think other vendors have these features, am i right ?

On 1/8/07, Oliver Boehmer (oboehmer) <oboehmer at cisco.com> wrote:
> cisco-nsp-bounces at puck.nether.net <> wrote on Monday, January 08, 2007
> 9:38 AM:
>
> > Hi,
> >
> > I am confused with the different backup methods and
> > technologies available
> > and would like to just make it clear in simple terms (RSVP,
> > LDP FRR, TE, LDP FRR, VPN FRR, IP FRR...)
>
> Well, the terms "LDP FRR", "VPN FRR" don't exist per se.
>
> > In an MPLS Core you can use MPLS TE FRR to make different
> > LSPs(tunnels) to protect traffic coming from PEs incase of P router
> > or link failure, correct?
>
> Yes, MPLS TE FRR protects traffic sent via TE Tunnels by creating backup
> tunnels for these TE tunnels.
>
> > How about LDP FRR, IP FRR, VPN FRR ? what are they used for
> > and what are the main diff. between each?
>
> As mentioned, there is no LDP FRR and VPN FRR. MPLS TE FRR protects all
> TE tunnels, so if you put VPN traffic into a TE tunnel, you can protect
> this traffic as well (maybe you call this VPN FRR)
>
> IP FRR is a new/emerging technology to protect also non-labeled IP
> traffic. It uses pre-comupted backup paths much like TE-FRR, but doesn't
> require the traffic to be TE-tunneled and doesn't use RSVP to set up the
> path. There are several components to IP FRR, much of it is still being
> debated within the IETF..
>
> > In the case of a CE that has one link to 2 different PEs(dual homed),
> > assuming one link is primary and the other is backup, which
> > technology can we use to steer customer VPN traffic incase the
> > primary PE node or link fails to the backup PE?
>
> You need to use regular BGP attributes (like MED or localpref) within
> the MPLS-VPN network.
>
>         oli
>