Junos Asymmetric Routing

Ken Gilmour ken.gilmour at gmail.com
Fri May 28 10:21:43 CDT 2010


Hi Jack

On 28 May 2010 07:08, Jack Bates <jbates at brightok.net> wrote:

>
> Your BGP config with ISP2 is probably unideal. This has lead to packets
> coming in via ISP2 despite the fact you prefer to use ISP1. Often, people
> only do AS Prepend to alter traffic patterns. However, if a packet finds
> it's way to your directly connected ISP, an AS Prepend is not enough. It
> will be sent to you based on local preference. Setting appropriate
> communities with your ISP can often override this preference so they will
> send the packet towards your ISP1 instead of direct.
>
> Strangely, BGP actually works without issues. The only issue is with
statically routed ranges.



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