Three Ways to Specify Multiple Ports on a Virtual Server

Regarding Address-Lists and the virtual-addresses which are created. I've recently used address-lists as destination addresses for several virtual servers. I have assigned the virtual-addresses to multiple traffic groups, however I have found that whenever I edit the address-list or when the configuration is loaded, any virtual addresses that are not in traffic-group-1 are moved from their traffic group to tg-1. I don't know why this happens and don't have a fix as yet, so something to be aware of.