Re: BGP route injection

From: Steve Di Bias <sdibias_at_gmail.com>
Date: Tue, 19 Apr 2011 20:43:01 -0700

Oh well thanks for the link ;)

On Tue, Apr 19, 2011 at 8:41 PM, Jacek <q.192.168.1.0_at_gmail.com> wrote:

> I found the answer:
>
> The solution is to set attributes on the inject-map itself, where the route
> to be injected is defined, All configs on R4:
>
> route-map INJECT permit 10
> set ip address prefix-list NEW-ROUTE
> set local-preference 1000
> set community no-export
>
> route-map EXIST permit 10
> match ip address prefix-list ROUTE
> match ip route-source prefix-list ROUTE-SOURCE
>
> ip prefix-list NEW-ROUTE seq 5 permit 1.1.3.0/24
> ip prefix-list ROUTE seq 5 permit 1.1.0.0/22
> ip prefix-list ROUTE-SOURCE seq 5 permit 10.1.34.3/32
>
> router bgp 400
> bgp inject-map INJECT exist-map EXIST
>
> This info is deeply hidden on DocCD, IOS 12.2T, Feature guides, BGP
> conditional route-injection:
> http://www.cisco.com/en/US/docs/ios/12_2t/12_2t4/feature/guide/ftbgpri.html
>
>
> On Tue, Apr 19, 2011 at 5:09 PM, Jacek <q.192.168.1.0_at_gmail.com> wrote:
>
> > Hello Experts,
> >
> > I have a question regarding conditional route injection in BGP. Is it
> > possible to set attributes on an injected route ? Here is scenario:
> >
> > R1(AS100)---R2(AS200)---R3(AS300)---R4(AS400)
> >
> > R1 advertises four routes: 1.1.0.0/24, 1.1.1.0/24, 1.1.2.0/24 and
> > 1.1.3.0/24
> > R3 aggregates those routes as 1.1.0.0/22
> > R4 injects specific route with command:
> > # bgp inject-map INJECT exist-map EXIST
> >
> > As a result R4 sees aggregated route and more specific route:
> > Network Next Hop Metric LocPrf Weight Path
> > *> 1.1.0.0/22 10.1.34.3 0 300 200 100
> i
> > *> 1.1.3.0/24 10.1.34.3 0 ?
> >
> > How can I set attributes on R4 on specific /24 route, like local
> > preference, and how ?
>
>
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-- 
-Steve Di Bias
Blogs and organic groups at http://www.ccie.net
Received on Tue Apr 19 2011 - 20:43:01 ART

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