multiple redirect iRules on a VS

The problem is that you have multiple redirect invocations in the same HTTP request. When you compile the iRule the two HTTP_REQUEST events are mashed together, so you end up with something like this:

when HTTP_REQUEST {

if { [HTTP::uri] equals "/" } {

HTTP::redirect "/irj/portal/"

HTTP::redirect "/maintenance site"

}

}

This is a bad thing. Here's a thought. Given the way that events are mashed together on compile, why not modify your iRules to look something like this:

Regular iRule:
when HTTP_REQUEST {
if { [info exists MAINTMODE] and $MAINTMODE eq "on" } {
HTTP::respond 302 Location "maintenance site"
} elseif { [HTTP::uri] equals "/" } {
HTTP::respond 302 Location "/irj/portal/"
}
}

Maintenance mode iRule:
when HTTP_REQUEST priority 10 {
set MAINTMODE "on"
}

This way, the MAINTMODE variable only exists in the request when you add the maintenance mode iRule, and the higher priority ensures that it's available before the condition is checked.