iRule Variables Shared across Virtual Servers

Hi,

I would like to maintain a SIP over UDP connection over a pool with failover between nodes in a pool. In my testing, the existing SIP call fails but a new incoming call does swing to the standby node during node failover.

Since I can't use LB_FAILED because the SIP connection is over UDP. Do you have any suggestion of what I can use to failover but maintain the existing SIP call but served by the standby SIP node.