Re: bgp send-label with a route-map

Hi Aleksey,

  The route-map is used for label distribution control. If a BGP neighbor is
configured with the send-label cli and there is no outbound route-map
configured for that neighbor, the labels are advertised with all the
prefixes. Once a route-map is specified, only those prefixes in the matching
route-map that have the 'set mpls-label" will be advertised with labels, the
rest wont. So, if an outbound route-map is configured without the 'set
mpls-label' cli, this means no prefixes will be advertised with labels.

HTH,
Ramiro G

On Thu, Oct 8, 2009 at 2:21 PM, Bryan Bartik <bbartik_at_ipexpert.com> wrote:

> This is the way it works. I think Aleksey just wants to know why. I would
> like to know too! Kind of a bugger when you first start dealing with
> send-label and you are destined to spend hours (unless you peak in the
> solution guides) troubleshooting before you learn it!
>
> On Thu, Oct 8, 2009 at 3:11 PM, Marcel Lammerse <m.lammerse_at_mac.com>
> wrote:
>
> > Hi Aleksey,
> >
> > interesting question! Could you post your route-map and bgp configuration
> > for us to have a look at?
> >
> > Thanks
> >
> >
> >
> > On 08/10/2009, at 03:50 , Aleksey Koltsov wrote:
> >
> > Hi Group,
> >>
> >> I have a question regarding bgp send-label operation. The functionality
> >> itself
> >> is clear, but the only thing I can't understand is that BGP stops
> sending
> >> labels with prefixes when I attach a route-map to a peer without "set
> >> mpls-
> >> label" inside that route-map.
> >>
> >> So why does it work w/o a route-map while requires "set mpls-label" if I
> >> attach a route-map? What does the route-map affect? Does it "rewrite"
> NLRI
> >> or
> >> what?
> >>
> >> Thank you for answering me.
> >>
> >>
> >> Blogs and organic groups at http://www.ccie.net
> >>
> >> _______________________________________________________________________
> >> Subscription information may be found at:
> >> http://www.groupstudy.com/list/CCIELab.html
> >>
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
> >
> >
> >
> >
> >
> >
> >
> >
>
>
> --
> Bryan Bartik
> CCIE #23707 (R&S), CCNP
> Sr. Support Engineer - IPexpert, Inc.
> URL: http://www.IPexpert.com <http://www.ipexpert.com/>
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Thu Oct 08 2009 - 22:44:35 ART