Re: Inject Maps

Yes, you are correct, but what if i advertise that summary route to you and
you need to have one of the specific routes of that aggregate?
The combination of exist-map and Inject-map to the rescue.

On Sat, May 8, 2010 at 1:25 AM, smith <wilsmith0_at_gmail.com> wrote:

> On Fri, May 7, 2010 at 5:36 PM, Kambiz Agahian <kagahian_at_ccbootcamp.com
> >wrote:
>
> > And my take :)
> >
> > You call your upstream SP 50 times per day asking for some more specific
> > components they ignore you and since you need them for something like
> > downstream advertisement; you "create" them yourself! Nice and easy.
> >
> > HTH
> >
> > --------------------------
> > Kambiz Agahian
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> >
> > -----Original Message-----
> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> > Roy Waterman
> > Sent: Friday, May 07, 2010 9:30 AM
> > To: Joe Astorino
> > Cc: smith; Cisco certification
> > Subject: Re: Inject Maps
> >
> > If I may add to Joes explanation.
> >
> > You may get asked to advertise a specific prefix 10.0.1.0/24 eg. to
> > another
> > BGP peer, yet you are only receiving the aggregate 10.0.0.0/22. Using an
> > inject map will help here.
> >
> > Regards
> > Roy
> >
> > On 7 May 2010 16:30, Joe Astorino <jastorino_at_ipexpert.com> wrote:
> >
> > > The idea is that if you have some prefix in your BGP table, you can
> > > "un-aggregate" it and inject into BGP more specific prefix
> > > information. For exmaple, let's say you had 10.0.0.0/22 in your
> > > routing table, which is an aggregate of 10.0.0.0/24, 10.0.1.0/24,
> > > 10.0.2.0/24, and 10.0.3.0/24 and you want to inject into BGP the more
> > > specific /24 prefixes. An inject-map could help you with that. So in
> > > essence you would be taking that aggregate /22 route and
> > > "un-aggregating" it back to 4 /24 prefixes.
> > >
> > > HTH.
> > >
> > >
> > >
> > > On Fri, May 7, 2010 at 11:12 AM, smith <wilsmith0_at_gmail.com> wrote:
> > > > Hi Group,
> > > >
> > > > I am little bit confused with this. Could anyone please guide me, in
> > > which
> > > > situation a Inject Map is essential ?
> > > >
> > > > Many thanks.
> > > >
> > > > -
> > > > smith
> > > >
> > > >
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> > >
> > >
> > >
> > > --
> > > Regards,
> > >
> > >
> > >
> > > Joe Astorino - CCIE #24347
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> > --
> > Regards
> > Roy
> >
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> > Thanks guys...One more doubt ...what other technologies can be used to
> un-aggregate a summary prefix in BGP ? I believe suppress map could help us
> in this occasion !!!!
>
>
> regards
> --
> smith
>
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-- 
Narbik Kocharians
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