[115026] in North American Network Operators' Group
Re: Facility wide DR/Continuity
daemon@ATHENA.MIT.EDU (Roland Dobbins)
Wed Jun 3 11:04:55 2009
From: Roland Dobbins <rdobbins@arbor.net>
To: NANOG list <nanog@nanog.org>
In-Reply-To: <3c3e3fca0906030737o523ba301k32f83a9c86c50d6b@mail.gmail.com>
Date: Wed, 3 Jun 2009 22:05:34 +0700
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Jun 3, 2009, at 9:37 PM, William Herrin wrote:
> If you can afford it, stretch the LAN across the facilities via fiber
> and rebuild the critical services as a load balanced active-active
> cluster.
I would advise strongly against stretching a layer-2 topology across
sites, if at all possible - far better to go for layer-3 separation,
work with the app/database/sysadmin folks to avoid dependence on
direct adjacencies, and gain the topological freedom of routing.
-----------------------------------------------------------------------
Roland Dobbins <rdobbins@arbor.net> // <http://www.arbornetworks.com>
Unfortunately, inefficiency scales really well.
-- Kevin Lawton
