Thanks to the links from WayneG I am now able to set up some different scenarios with my two HiperARC's I also found the manual had a couple more. http://totalservice.commworks.com/tcsDocs/4.2/10039434/104_ch10.htm#15817 What the manual doesn't say is what is the preferred way to balance two hiper's for performance and redundancy. The easiest way seems to be example 8 that delegates all the work to the NMC by doing this on both ARC's. set chassis slot 1-16 owner no enable nmc chassis_awareness enable nmc dynamic_slot_assignment enable nmc dsa_idle_rebalancing But, this seems to defeat redundancy. Now both ARC's rely on one NMC. I know the chances are slim of an NMC and a ARC going out at once but why make them redundant at all. I guess if the NMC croaks then the ARC's just keep their current assignment until the NMC reappears? Meaning it is redundant still? kindof? I have also heard some problems from the list with chassis awareness. Bottom line: Is anybody doing this? How are you doing it? Are you happy with how it is going? -- Lewis Bergman Texas Communications 4309 Maple St. Abilene, TX 79602-8044 915-695-6962 ext 115