Re: route advertise in BGP

From: Anthony Bonilla (anthonybonilla.ccie@gmail.com)
Date: Thu Mar 15 2007 - 17:36:16 ART


Brian,

To me, it sounded like a concept type question - it did not seem to be that
Ming has a real setup that he is working with. I would say you would
advertise both host routes and /23 out to your eBGP peer if the routes are
valid and also you need to ensure that there is a corresponding /23 network
in your IGP before you can advertise it via BGP using a network statement
being that the router will not summarize the two host routes automatically.

HTH

Tony

On 3/15/07, Brian McGahan <bmcgahan@internetworkexpert.com> wrote:
>
> Assuming the host routes aren't being manually filtered they should be
> passed on. Look at the "show ip bgp 192.168.10.91 255.255.255.255"
> output and see what it says about it being advertised. Also are you
> sure that these host routes are best routes?
>
>
> HTH,
>
> Brian McGahan, CCIE #8593 (R&S/SP)
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
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>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Ming Ki Au
> Sent: Thursday, March 15, 2007 11:22 AM
> To: Cisco certification
> Cc: ricky.au@citigroup.com
> Subject: route advertise in BGP
>
> Dear all,
>
> I have a question on BGP, can anyone help?
>
> A router running BGP AS 200 is receiving from its ebgp peers (AS 100)
> with 2
> host routes. 192.168.10.91/32 and 192.168.10.92/32.
>
> Then it advertise another route using the network command with the
> followings.
>
> router bgp 200
> network 192.168.10.0 mask 255.255.254.0
>
>
> What routes will be distributed to another eBGP peer (AS 300)? I found
> that
> only a single route 192.168.10.0/23 which is originated from AS 200 is
> advertised to AS 300, is it correct?
>
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