On 11/11/2009 03:19 PM, William Attwood wrote:
It';s been several years since I have set that up, but the old alteons (now owned by nortel) would do geographical load balancing with one in each location.Hello--How does one accomplish geographical load balancing? With that in mind, what about geographical failover? Example, I have a data center (DC) in Dallas, and another in Salt Lake. How do I re-direct traffic if Dallas goes offline? Just a project I'm diving into. colo-specific load balancing and failover is accomplished, now we need to protect against the data center going offline, and speed of access to machines. I see how I can do geographical failover with a geographical load balancer, however, do I need 2 geographical load balancers if one of them goes offline? Has someone here worked on a project of this magnitude?
Basically, you setup your auth dns to point to each location, with any subdomain in DNS delegated to the load balancer. It would then give out dns based on which one it found to be quicker, etc, and in an outage would give just itself out for it's local farm.
Of course, if you are doing IPv6, check out the anycast stuff. Quite amazing.
-Steve
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