redirect irule with a DSR ("Performance (Layer 4)") Virtual Server?

I've got an LTM configured for DSR, and a virtual server set up as type "Performance (Layer 4)" with client protocol "nPath". I want to be able to issue a redirect if all nodes are unavailable.

 

 

Normally, I'd use an iRule that looks for LB_FAILED and does an "HTTP::redirect", but that won't work on the virtual server as configured.

 

 

Is there a way to do this, or am I out of luck because it's DSR and so it's not doing a full proxying?

 

 

Thanks!

 

--Regis