Re: [nsp] BGP advertised routes

From: Francois Baligant (francois@be.wanadoo.com)
Date: Sun Nov 11 2001 - 19:55:28 EST


        Does he has something particular in mind ? Like only routing
        a few AS to you because you have good connectivity (peering?)
        to them ?

        If this is the case, go with filter-list and only annonce him
        routers with a particular AS in the path.

        If not, then just tell him this is useless. Only annoncing
        400 routes from the global Internet tables sounds kind of funny
        to me.

        You can reduce the full table by dropping "lower-than" some
        subnet mask length prefix (like all the /24) but I doubt you
        will go down to only 400 routes.

        regards,
        Francois

-- 

Francois Baligant _ Wanadoo Belgium NV/SA, Network Operation Center ( ) a subsidiary of France Telecom /_\/ Lozenberg 22 - B-1932 Zaventem francois@be.wanadoo.com (__/\ tel: +32 2 717 17 17 FB1-6BONE FB3122-RIPE fax: +32 2 717 17 77

- "if you hold a unix shell to your ear, do you hear the c?"

On Fri, 9 Nov 2001, Ysmael B. Tan wrote:

> yes, my client is multi-homing. he does not want the default route, just want about 400+ routes from my upstream provider. > > > Thanks > > > > ----- Original Message ----- > From: Tito B. > To: Ysmael B. Tan > Sent: Friday, November 09, 2001 4:38 PM > Subject: Re: [nsp] BGP advertised routes > > > At 01:06 AM 11/9/01 -0500, you wrote: > >Hi, > > > >Please help me. Im trying to advertise to a customer routes coming in from > >my upstream provider. i use the the route-map & as-path commands specific > >to the my AS & my upsteam AS. but the problem is that my upstream provider > >advertises about 3000+ routes on his AS. > > > >My customer wants only about 400 routes comming in to his router due to > >memory limitation. Is there a way to limit the number of routes i will > >pass on to my customer? > > > look at your route map or filter list configs. > > you can always set them using only filter-list. why not advertise > none to him and just point default to you? your client is not multi-homing > isn't he? 400 routes + default is the same as default only. > > ./tito > >



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