[c-nsp] PFR Question

[jack daniels]

But if you have --



|CE1--------PE1
PE3--------CE3
 X.X.X.X---------|                 --------------------MPLS
DOMAIN-------------------
                     |
CE2--------PE2
PE4--------CE4


Now my primary link is CE1-PE1 and secondary is CE2-PE2
If my CE1-PE1 goes down i route traffic via CE2-PE2<<<<<<I understand this
ok...

when traffic from CE3 for X.X.X.X reaches PE3 , next hop is still PE1 ( as
MPBGP has not converged so fast in MPLS domain of SP) ...so how will traffic
be forwareded , as PFR claims 3 sec.

On Thu, Mar 25, 2010 at 10:16 PM, David Prall <dcp at dcptech.com> wrote:

> PfR is a unidirectional feature. The router on the other end needs to be
> configured with PfR as well in order to have bidirectional visibility.
> Typically the master controller will be local to the site.
>
> --
> http://dcp.dcptech.com
>
>
> > -----Original Message-----
> > From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> > bounces at puck.nether.net] On Behalf Of jack daniels
> > Sent: Thursday, March 25, 2010 12:35 PM
> > To: cisco-nsp at puck.nether.net
> > Subject: Re: [c-nsp] PFR Question
> >
> > dear guys,
> >
> > is my mail being delivered to group as no one replied.
> >
> > On Wed, Mar 24, 2010 at 11:42 PM, jack daniels
> > <jckdaniels12 at gmail.com>wrote:
> >
> > > Hi Network champs,
> > >
> > > I'm stuck in understanding of PFR . Docs say it converges in 3 sec (
> > for
> > > realtime traffic VOICE )...
> > >
> > > I understand you can send traffic out secondry link but what about
> > traffic
> > > which has to come back from remote end ( for which SP has not
> > converged).
> > >
> > > But if you have --
> > >
> > >
> > >
> > > |CE1--------PE1
> > > PE3--------CE3
> > >  X.X.X.X---------|                 --------------------MPLS
> > > DOMAIN-------------------
> > >                      |  CE2--------PE2
> > > PE4--------CE4
> > >
> > >
> > > Now my primary link is CE1-PE1 and secondary is CE2-PE2
> > > If my CE1-PE1 goes down i route traffic via CE2-PE2<<<<<<I understand
> > this
> > > ok...
> > >
> > >
> > > BUT MY QUESTION IS -
> > >
> > > PE3 and PE4 ( for this VRF) still has NOW converged the BGP and still
> > for
> > > it next hop for X.X.X.X is PE1. So how fwd can happen in 3 sec untill
> > > Service providers all routers dont converge and understand that CE1-
> > PE1 link
> > > is down.
> > >
> > >
> > > Regards
> > >
> > >
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