Re: Inject Maps

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
>
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> 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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> > Joe Astorino - CCIE #24347
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> 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
Blogs and organic groups at http://www.ccie.net