[110252] in North American Network Operators' Group
Re: Failover solution using BGP
daemon@ATHENA.MIT.EDU (William Herrin)
Tue Dec 30 21:29:47 2008
Date: Tue, 30 Dec 2008 21:29:32 -0500
From: "William Herrin" <herrin-nanog@dirtside.com>
To: "Naveen Nathan" <naveen@calpop.com>
In-Reply-To: <20081231000832.GB6841@armakuni.lastninja.net>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Tue, Dec 30, 2008 at 7:08 PM, Naveen Nathan <naveen@calpop.com> wrote:
> I have a client that would like to announce a /18 & /19 over BGP in
> Sacramento and LA, us being the second location in LA. Our location
> will be a failover location incase Sacramento goes down.
>
> They want failover for extreme cases when they're completly down in
> Sacramento. They have strict requirements so that traffic to their blocks
> should exclusively go to Sacramento or LA.
Announce from Sacramento normally.
Announce from LA with an AS prepend 3 or 4 deep.
GRE tunnel from LA back to Sacramento diverting the few packets which
insist on going to LA back to Sacramento during normal operation.
Or conditionally announce in LA based on a monitoring process which
watches Sacramento and deal with the extra complexity and longer
restoration time.
Regards,
Bill Herrin
--
William D. Herrin ................ herrin@dirtside.com bill@herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004
