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Thread Index Re: [isp-bgp] multipath BGP
On 6/15/05, Edward Brookhouse <ebroo@...> wrote:
> Charles,
>
> Thanks for the reply! I have been doing some research, but I have been
> unable to find a good example resource for setting up the announcement
> of local preferences.
Ed,
No Problem. Well, the reason why you have not been successful in
finding documentation on how to "announce" a localpref is because you
cannot "announce" it. Local preferences are set/honored only within a
single AS or confederation. To get around this, a lot of providers have
setup a set of BGP communities, numbers you can tag onto route objects.
What the communities are and how they are applied are completely up to
the provider, which is why I started collecting the community guides.
> Could you possibly suggest any sites/docs etc that you feel would be a
> good place to start reading?
http://safari.ciscopress.com/?XmlId=158705017X is a really good book.
But there's a lot about BGP that a book will not tell you. More specifically
on how carriers route and accept announcements. Every one is different,
so the book is a good reference, but that's it.
charles
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