Dynamic redirect to fallback host

Thanks!

Is it possible to refer to pool that has "failed", for example by passing it to the function LB_FAILED like that:

when LB_FAILED pool1 {
HTTP::redirect http://some.maintenancesite.com/

Or will I have to query the selected pool in an if-statement within the LB_FAILED block?

Which function would be appropriate for that? I couldn't find any POOL:: functions in the manual? Do they exist?

Rgds,

Martin