Hi Pedro,
I'm not positive on this, but I think you should be able to set a domain on the persistence cookie that would tell the client to present the cookie for any request to a subdomain on the domain you specify. This works when the node is setting the cookie, but I'm not certain it will work with a cookie the BIG-IP is setting itself.
Can you test it and report back? Note that you'll need to change the name of the cookie you're looking for, from my_persistence_cookie.
when HTTP_RESPONSE {
if {[HTTP::cookie count] > 0 } {
foreach aCookie [HTTP::cookie names] {
if { $aCookie == "my_persistence_cookie" } {
HTTP::cookie domain $aCookie mycompany.com
}
}
}
}
[EDIT: fixed the setting of the domain on the cookie...and removed an extra pair of curly braces]
Aaron