[isp-bgp] Re: Multi-site BGP

[Michael Loftis <mloftis@...]

No you can't just advertise the other site through BGP, because then 
packets could get delivered to other site depending on if it had a better 
path or not...

What you can do is a conditional advertisement...Take a look at the 
archives for this list, I seem to remember it being discussed very recently.

--On Thursday, January 30, 2003 4:20 PM -0500 Rich Pulver 
<pulverr@...> wrote:

> Hello all. I have a question regarding BGP for Disaster Recovery. Does
> anyone use BGP currently for fail over to a DR site? If so, is it as
> simple as advertising my networks through providers in both locations and
> configuring the primary site as the preferred until that site goes away?
> (Or am I missing the fact that I won't be able to direct inbound traffic
> to such a degree?)
>
> This is what I have
>
> site1 - NY - Primary - 2 x T3 - 3 Class C from 1 provider - ASN with ARIN
>
> site2 - CA - DR - 2 X T3
>
> I am already running BGP with two upstreams in NY. Can I just advertise my
> routes and ASN in CA so all traffic will be redirected there if anything
> happens in NY? Are there any ramifications to this type of setup? Any
> input would be greatly appreciated. Thanks.
>
>
> Rich