From: Ed Lui (edwlui@gmail.com)
Date: Thu Mar 13 2008 - 05:59:16 ARST
Emil,
router bgp 123
aggregate-address 172.16.1.1 255.255.255.255 summary-only
aggregate-address 172.16.3.3 255.255.255.255 summary-only
I believe this will satisfy the requirement.
HTH,
Lui
On Wed, Mar 12, 2008 at 11:18 PM, YourPal <dearprudence28@gmail.com> wrote:
> Hi Group,
>
> I came across the following BGP scenario:
>
> R1, R2, and R3 are in AS 123. They are fully-meshed. R4 is in AS 456. R4
> peers with R1 and R2.
>
> R1 advertises 172.16.1.1/32 into BGP.
> R2 advertises 172.16.2.2/32 into BGP.
> R3 advertises 172.16.3.3/32 into BGP.
>
> Configure R1 so that R4 prefers R1 to reach 172.16.1.1/32 and
> 172.16.3.3/32.
> Route filtering and AS path manipulation are prohibited.
>
> The way I see it, I'm left with the option of configuring MED. However
> since
> the task restricts the config to be done on only R1, AFAIK there's no way
> to
> influence MED because both R1 and R2 will advertise the prefixes to R4
> with
> MED=0 (unless I'm allowed to configure a higher MED value on R2).
>
> Can't think of a solution. I may be missing something. Appreciate any
> help.
>
>
> Thank you.
>
> BR,
> Emil
>
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