When we set up a chassis with multiple arc's for performance and redundancy, can the arc's share ip address space, or do we have to have twice as many ip addresses as actual modems to avoid potential conflicts? The problem that might occur would be if an arc failed and the other took over, how would it know which ip addresses have already been assigned? Then again, if an arc fails what happens to the sessions it was hosting? Are they dumped anyway? Mark Thornton San Marcos Internet, Inc. 512-393-5300 - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.