How to source outbound traffic from VIPs
The firewall modules are an HA pair, and they translate the private IP's from the F5 to the public IP address. What happened was that when the firewall modules came up, they both must have been active briefly, and a number of VIP's became associated with the inactive firewall's MAC address (on the outside interface). A "clear arp" on the router fixed this, but we suffered too much downtime before hitting on this.
I am looking for a way to source outbound traffic from the virtual server IP every 10 or 15 seconds, to ensure that it's ARP entry will constantly be refreshed. It could be a ping, or UDP packet or whatever - just something that will generate traffic, and thereby refresh the ARP entry in the upstream router.
Anybody have any thoughts on how to make this happen?
Thanks!
-Daniel