Hello All This is Faheem. I am not sure if I have transgressed by using this forum to seek help to setting up DHCPv6 in a test LAB. For last six months I and my team are busy setting up IPv6 in a test lab. So far we have succeeded in the following: LAN Dual stack host machines (Windows XP, Vista and Windows 7) Servers, Dual Stack (Windows Server 2003 and 2008) WAN (Leased Line link of 2Mbps capacity) Cisco Routers running IPv6 enabled IOS (Dual Stack and IPv6 only Config, both cases) RIPv6 The communication is happening on the network (LAN & WAN) very well with static IPv6 address assignments. Local hosts file are doing right resolutions. Windows server 2003 doesn't offer stateful address allocation while Windows server 2008 does allow this feature but practically speaking XP and Vista clients seem to be not aware of such a server on LAN. Windows 7 gets the IP address but couldn't communicate with other machines and says "General Transmit Failure" error. The same machines when given static IP address works very well. Objectives: To have a stateful IPv6 DHCP addresses assignment so the clients are populated in a controlled manner, especially in a typical office environment. I wish if I could get help to setting up a DHCPv6 Server offering stateful address assignment and would allow to advertise server options too like default gateway, preferred DNS servers. Our current scenario is based on Windows Servers offering DNS, PROXY, File Sharing, and DHCPv4 services. Every client which comes on LAN, is known to administrators and have group policies enforced. We have tried Dibbler on Linux and Windows both but in turn it has its own practical limitations that wouldn't fit in our scenario. Thanking You Faheem Syed Muhammed _______________________________________________ Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf