Multi site BGP Routing design

Chris Adams cmadams at
Sat Jun 6 00:16:55 UTC 2009

Once upon a time, Steve Bertrand <steve at> said:
> Unless someone else has any better advice (I'm sure they do), you will
> need two separate public ASNs. Site 1 advertises it's space out of AS1,
> and site 2 advertises it's space from AS2.

I don't know that it's better advice, but another way to link the two
sites is via a tunnel (GRE or IPIP).  Use the upstream IP on each router
as the local endpoint, and then run some routing protocol over the
Chris Adams <cmadams at>
Systems and Network Administrator - HiWAAY Internet Services
I don't speak for anybody but myself - that's enough trouble.

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