How are you? I make the IPv6 address plan for my company. Should I follow the IETF RFC to make IPv6 address plan. By IPv6 address plan, Should I save 64bits for cutomer ID ? I think it is a non-sense. Can I change the 64bits for cutomer ID, 56bits, 48bits ?. If you have any advice, send me it Thanks. ksb -- Kim, Sahng-Beom / Korea Telecom TEL : +82-42-870-8322 FAX : +82-42-870-8329 E-mail : ksbn@kt.co.kr --