How to use values from session table to do a lookup on persist table

The peristence table will do a lookup on the current VS. You need to use the options to tell it to look across all VSs. See https://clouddocs.f5.com/api/irules/persist.html

 

persist lookup   [all|node|port|pool]  
  "all" or no specification returns a list containing the node, port and pool name.  
  Specifying any of the other return types will return the specified item only.       
    =  | {  [any virtual|service|pool] [pool ] }        
     the latter key specification is used to access persistence entries across virtuals, services, or pools.

 

So you want to use

 

set table [persist lookup uie $session_mac any virtual]