Non-Standard GTM/ LTM failover Query

Since you have “dependencies” on your storage environment, and a requirement of a unique URL per Client.. I really don’t see a good way of getting around a lot of out of the out of the box features you have at your disposal without doing a lot of custom coding..

 

 

“ If we fail datacenters the External IP would change” This sounds like external traffic…

 

 

Since that is the case, hard to use an iRule at the GTM to key on LDNSs.. You may know the source address, but not the LDNSs..

 

 

You know the source addresses… you could do some traffic directing at the LTMs to cut down on actual elements.. but then you would need one VS per DC, and one global URL.. you could then failover en masse, and direct to the proper node on source.. but you would be limited to failing over en masse and not a per host basis, unless of course the two DCs were connected and you could load balance across the two.. hmmm or maybe you could have a “failover url” which would be the DC specific URL.. upon a failure you could issue a redirect to the client to access the other DC… That might be getting messy..

 

 

None the less, there are a lot of ways to skin this, and without knowing the requirements 100% this is a tough one..