Facility wide DR/Continuity

[rdobbins at arbor.net (Roland Dobbins)]

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 at arbor.net> // <http://www.arbornetworks.com>

         Unfortunately, inefficiency scales really well.

		   -- Kevin Lawton