Re: BGP Multihoming!

Hi,

Ask your ISP if they support this because if they have policies set up using
local preference at their end, no matter what you do you won't get traffic
as you desire. AS path prepend will work only if your ISP has neutral LP at
their side with the other provider, which is usually not the case if the
other provider is a peer.

--
Maulik
On Mon, Feb 1, 2010 at 10:05 AM, Nish Vamadevan <ipnish_at_gmail.com> wrote:
> Can't you prepend the as path and tell BGP to send the traffic back via one
> specified route?
>
> Are the AS path equal length and/or same?
>
> ------Original Message------
> From: manoj prajapati
> Sender: nobody_at_groupstudy.com
> To: Cisco certification
> To: cisco_at_groupstudy.com
> ReplyTo: manoj prajapati
> Subject: BGP Multihoming!
> Sent: 1 Feb 2010 04:13
>
> Hello Expert,
>
> Needed a help regarding BGP multi homing case.
> It seems simple at a glance yet somewhat confusing while explanation
>
> ----------------------------------------------
> I have 2 BGP multi homing scenarios....
>
> Case1:
>
> ISP A BGP 200 ----->  Customer A "router 1" BGP 100
> ISP B BGP 300 ----->  Customer A "router 2" BGP 100
>
> Case2:
>
> ISP A BGP 200 ----->  Customer A "router 1" BGP 100
> ISP B BGP 300 ----->  Customer A "router 1" BGP 100 (Same router 2
> interfaces)
> ------------------------------------------------------------
> I want that my outgoing "traffic" should be from router A(which we can
> controll by local preference in case 1 or weight in case 2)
> but only ISP B should sent traffice for our AS 100.
>
> How can we achieve that?
>
> Regards,
> Manoj P.
>
>
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