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[isp-bgp] Re: Multi-site BGP
I thought that if I just used path prepends in my DR site, I could always
make the primary the best path (unless it went offline).
-----Original Message-----
From: Rick Macchio [mailto:rmacchio@...Sent: Friday, January 31, 2003 8:58 AM
To: isp-bgp@isp-bgp.com
Subject: [isp-bgp] Re: Multi-site BGP
Couldn't you use MEDS or prepending to force inbound traffic toward one
site vs. the other? Or do you really need a conditional advertisement
to guarantee which path gets used in the inbound direction?
Thanks,
Rick Macchio
Michael Loftis wrote:
>
> 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
> >
>
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