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Posted by Trendkill on May 10, 2007, 1:31 pm
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> We have locations in two seperate cities connected by a single DS3. Each
> location has its own Internet connections and multiple edge routers. Both
> locations are also part of the same AS in BGP.
>
> I'm looking for an easy way to have traffic originating in location A prefer
> to go out to the Internet via location A's bandwidth and the same for
> location B. In otherwords, I want to reduce some of the traffic that is
> traversing our DS3 for the sole purpose of going out the other city's
> Internet connections.
>
> This seems to me like I would have to weight traffic based on source address
> and I'm not finding much help online.
>
> Any suggestions?
What IGP are you using? You basically need to have a better default
route advertised in A to A, and a better default route advertised in B
to B. All depends how you are redistributing or advertising into
your IGP......need more info.
If its strictly BGP, you can probably get away with setting route maps
to networks advertised across the DS3. Ensure that the default route
coming from the remote site is given a higher metric than that of the
local default route. Same w/ vice versa. Honestly you can probably
set all the routes coming across the DS3 from each side as higher
metric, as they will still be more specific for actual networks that
you are own, and it won't matter that they are a higher metric.
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