From: Farrukh Haroon (farrukhharoon@gmail.com)
Date: Sun Aug 10 2008 - 08:38:34 ART
I think with ORF the PE router needs to inform the CE router about
the prefixes it wants However Roger's requirement is: " The 5 routes are
not specified, so I don't know which one."
http://blog.internetworkexpert.com/2008/05/05/understanding-bgp-outbound-route-filtering-bgp-orf/
Please correct me if I'm wrong here.
Regards
Farrukh
On Sun, Aug 10, 2008 at 4:06 AM, Lloyd Ardoin <Lloyd@thewizkid.biz> wrote:
> What about ORF?
>
> Lloyd V Ardoin
>
> Network Engineer
>
> CCDA, CCNP, CCSP, GSEC, GCFW, CISSP
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Roger RPF
> Sent: Thursday, August 07, 2008 4:55 AM
> To: 'Victor Cappuccio'; 'Joseph Brunner'
> Cc: 'GS CCIE-Lab'
> Subject: AW: limit BGP prefixes sent to a neighbor
>
> Hi all,
>
> Well, interesting solution to define a vrf and specify the max prefixes
> allowed in the vrf. So in this case I would never send more than the
> specified amount. But the drawback, as Victor said, is that with this I
> would also limit the max routes I can receive in this vrf (if I
> understand
> that correct).
>
> My task is that router x should only advertise 5 routes to it's bgp
> neighbor
> y because y has not enough memory (just a fictive example). The 5 routes
> are
> not specified, so I don't know which one.
>
> Sure, I know, I could configure on y neighbor x.x.x.x max-prefix 5 to
> limit
> the received routes but the task says to limit the routes sent from x to
> y.
>
> Hmmm....
>
> thanks
>
> Roger
>
> -----Urspr|ngliche Nachricht-----
> Von: Victor Cappuccio [mailto:vcappuccio@gmail.com]
> Gesendet: Donnerstag, 7. August 2008 11:39
> An: Joseph Brunner
> Cc: Roger RPF; GS CCIE-Lab
> Betreff: Re: limit BGP prefixes sent to a neighbor
>
> Hi Jose,
>
> Those 2 are also are used to set the maximum amount of prefixes
> *received* and not only for information learned by a VRF via MP-BGP
> between PE and PE or BGP between the PE and the CE, but also for any
> routing context running between the PE and the CE routers. (rip, ospf
> whateva), I think that an alternative to Roger question could be the
> use of prefix-list and/or community lists and/or as-path list, but I
> am not sure if there is any mechanism to control the Max number of
> routes to *send* to a neighbor (say only 3 routes sent to neighbor X)
>
> Good question...
>
>
> On Thu, Aug 7, 2008 at 10:28 AM, Joseph Brunner
> <joe@affirmedsystems.com>
> wrote:
> > Sure; (warning I'm goofy)
> >
> > Does this count?
> >
> > 1. config vrf
> >
> > ip vrf 1001
> > rd 65000:1001
> > route-target both 65000:1001
> > maximum routes 1000 500 <- where we would limit to 1000, but warn at
> 500
> >
> >
> > 2. Place interface into vrf
> >
> > Int s0/0
> > Ip vrf forwarding xxxx
> >
> >
> > Run afi ipv4 to push the vrf routes from this router to our neighbor
> via
> > bgp...
> >
> > Router bgp 65000
> > Neighbor 1.1.1.1 remote-as 1
> >
> > address-family ipv4 unicast vrf 1001
> > Neighbor 1.1.1.1 activate
> >
> >
> > Of course if the other side of this router is to another bgp peer, you
> could
> > put that interface in a vrf, say that didn't have the max routes
> configured,
> > and add the route targets to get routes between the vrf's.
> >
> > -Joe
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > Roger RPF
> > Sent: Thursday, August 07, 2008 5:10 AM
> > To: 'GS CCIE-Lab'
> > Subject: limit BGP prefixes sent to a neighbor
> >
> > Hi group,
> >
> >
> >
> > Is there a way to limit the maximum amount of prefixes that BGP sends
> to a
> > neighbor? I know that with neighbor x.x.x.x max-prefix I can limit the
> > received ones, but in sending direction?
> >
> >
> >
> > regards
> >
> >
> >
> > Roger
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> >
> _______________________________________________________________________
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> >
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> >
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> _______________________________________________________________________
> > Subscription information may be found at:
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> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
> --
> Victor Cappuccio
> CCIE R/S# 20657
> CCSI# 30452
> www.anetworkerblog.com
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
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>
>
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>
> _______________________________________________________________________
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