Re: BGP LABEL LSP

Hi

Can you please send the config on the routers in question.

regards

On Tue, Dec 11, 2012 at 5:26 PM, Routing Freak <routingfreak_at_gmail.com>wrote:

> Hi Marko
>
> I can see that the route is not using BGP LSP. I am seeing that it is
> taking only the IP Path and not the LSP path.
>
> I want the traffic to go into LSP and not take the Ip routing path.
>
> I am not seeing that BGP LSP is formed from R3 to R1.
>
>
> On Tue, Dec 11, 2012 at 9:52 AM, Marko Milivojevic <markom_at_ipexpert.com
> >wrote:
>
> > What happened when you labbed it up?
> >
> > --
> > Marko Milivojevic - CCIE #18427 (SP R&S)
> > Senior CCIE Instructor - IPexpert
> >
> > :: This message was sent from a mobile device. I apologize for errors and
> > brevity. ::
> >
> > On Dec 10, 2012, at 18:00, Routing Freak <routingfreak_at_gmail.com> wrote:
> >
> > Anybody get this ? ANy thoughts on this ?
> >
> >
> >
> >
> > On Mon, Dec 10, 2012 at 10:41 PM, Routing Freak <routingfreak_at_gmail.com
> >wrote:
> >
> >> Hi
> >>
> >> I have a topology like this
> >>
> >> ____________ibgp______________
> >>
> >> R5------------------R1-------------------R2-----------------------R3
> >> ibgp ebgp ebgp
> >>
> >>
> >> R1 and R3 are running iBGP in AS 100 and R1 and R2 are running eBGP with
> >> R2 in AS 200 and respectively R2 and R3 are eBGP neighbors.
> >>
> >> There is no physical connection between R1 and R3 . There is an iBGP
> peer
> >> between R1 and R3 via R2 which is a eBGP peer with both R1 and R3
> >>
> >> Now R1 is a RR and R5 and R3 are clients
> >>
> >> MPLS is enabled between R1 and R2 and R2 and R3. But there is no LDP or
> >> RSVP enabled on those interfaces.I have just enabled the forwarding
> place
> >> saying that this interface can receive labelled packets.
> >>
> >> R3 is learning R5's routes via R1's iBGP connection with a next hop as
> R5.
> >>
> >> R5's loopback is advertised as ebGP route to R2 from R1 and it is passed
> >> to R3 from R2 as eBGP route.
> >>
> >> Now when R1 is sending as Ipv4 Unicast routes with Labels on it. ( with
> >> Send label option ) to R2.
> >>
> >> R2 is also having the send label in the eBGP peering with R3 .
> >>
> >> So now for R3 to reach R5s loopback there it should use a label sent
> from
> >> eBGP neighbor R2.
> >>
> >> So now here is the problem part. I dont have a label for the prefixes (
> >> ie R5 advertised prefixes ) and i only have the next hop which is R5
> >> loopback label ( ie advertised by R2 to R3 ) .
> >>
> >> So when R3 is sending traffic to R5's prefixes, will it use the BGP
> label
> >> to R2 and R2 will use the BGP label to reach R1 and then R1 will strip
> the
> >> label and do a normal routing lookup to send traffic to R5
> >>
> >> Will BGP label forms an LSP ?. When a next hop in a BGP table is again
> >> learned by BGP, will it use the BGP label to send the traffic ?
> >>
> >> Without the prefix label , will only the next hop BGP label will work to
> >> form LSP ?
> >>
> >>
> >>
> >>
> >>
> >
>
>
> --
> Regards
> Routing Freak CCIE#35889 (SPv3)
>
>
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Received on Tue Dec 11 2012 - 18:02:20 ART