Redirecting to a webpage when all the health check fails to the memerbs o the pool

I am running 9.1.2 and I am trying to accomplish similiar redirect.

 

I have tried fallback host , but works on any node down ( or not reachable

 

eg. timeout). I also tried LB:; Failed, but had similiar results?

 

 

My question to group is your opinion on following irule to redirect when all

 

nodes in pool down to error page.

 

TIA...Be gentle I am newbie at irules :-)

 

 

rule minmembers {

 

when HTTP_REQUEST {

 

if { [active_members VistaHttp] < 1 } {

 

HTTP::redirect http://so-mako.sysoff.ctstateu.edu/Vista-fa.nsf/VT-LBF?OpenForm

 

}

 

}

 

}