Cookies shared between subdomains..pointing to same VS

You can set the domain on the persistence cookie using a rule:

This rule assumes you're using the default persistence cookie name (BIGipServerPOOLNAME). If you've customized the cookie name in the persistence profile you could hardcode it in the rule and remove the LB_SELECTED event.

http://devcentral.f5.com/Default.aspx?tabid=53&forumid=5&tpage=1&view=topic&postid=1133611608

 
 when LB_SELECTED { 
     get the pool name used for this request 
    set my_pool [LB::server pool] 
 } 
 when HTTP_RESPONSE { 
  
     Check if the persistence cookie exists in the response 
    if {[HTTP::cookie count] > 0 and HTTP::cookie exists "BIGipServer$my_pool"} { 
  
        set the domain attribute on the persistence cookie to .example.com. 
       HTTP::cookie domain "BIGipServer$my_pool" ".example.com" 
     
 } 
 

Aaron