Re: Query on BGP path selection

Hi Pratik,

As per my understanding in your scenario you have:-
R1 and R2 is AS6554
R3 abd R4 in AS6559
172.16.1.0 is originated in 172.16.1.0
R3 is configured with MED value 4000 and R4 is configured with MED value 0.
R1 is setting local pref of 200 for all the routes received by R3
R2 is setting local pref of 100 for all the routes received by R4.

Lets consider x route is originiated in AS6559.
In this case,
R1 and R2will have x.x.x.x two routes one with LP200 and MED4000 while
another with LP100 and MED0.

172.16.1.0 will prefer R1-R3 path cause it has lower LP as LP comes before
MED.

Hope this is the scenario you were trying to create.

Cheers,
Nicky
HTH

On Sun, Dec 13, 2009 at 10:44 PM, pratik bendke <pratikbendke_at_gmail.com>wrote:

> Hi Frd's
>
> Having query in EBGP the scenario is
>
> eg:-
> R1(local preference 200) ----------------!------------------
> R3(MED 4000) R1-R3 DIRECTLY CONECTED
> !
> AS 6554 !
> AS 6559
> 172.16.1.0 !
> !
> !
> R2(Local preference 100) ----------------!------------------
> R4(MED 0 default) R2-R4 DIRECTLY CONECTED
>
>
> R1 & R2 in same AS 6554
> R3 & R4 in same AS 6559
>
> Now query is ntwork 172.16.1.0 take which path to reach router in AS 6559
>
> Path R1 - R3 ? OR
> Path R2 - R4 ?
>
>
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Received on Thu Jan 14 2010 - 19:21:16 ART