I need help creating an IRULE that redirect if pool members are down and url ends with /VCS

If no pool members are up, LB_FAILED will be triggered. It can be triggered for other reasons, but perhaps you wish to redirect any time that the traffic cannot be forwarded because of a failure? If so:

when HTTP_REQUEST {
    if { [HTTP::path] ends_with "/VCS" } {
        set vcs 1
    }
    else {
        set vcs 0
    }
}


when LB_FAILED {
    if { $vcs } {
        HTTP::redirect "http://www.site.com"
    }
}

The variable

$vcs