Take one pool down when another fails

I have, and tried it - the idea was to use alias of IP/port of a VS (Virtual Server):"frontend local"/"frontend remote" and "backend local"/"backend remote" - that was the second approach explained.

However it didn't work. if that should have worked I'll put some more effort in this.

---

Update:

I've further tested it, it is possible and this is the approach I'm going with (and was going with but for some reason it didn't work).

That's the 'Option 2' above (creating additional four VS and pools: primary frontends, primary backends, secondary frontends and secondary backends) with their respective pools).

Then: on the whole-backends (primary and secondary with priority groups) VS and pool add in that pool's per node healthcheck and add additional 'alias' healthcheck of the primary frontends.

Similarly on the whole-frontends

Similarly on the 'backup' location