Re: I want to enable dhcpv6 over mpls vpn, what should I do ?
Sorry, it's not UID it's DUID (my bad).
Anyway, from your PC command prompt (DOS), type in ipconfig /all, you will receive similar output to below. Including the DUID # is used mainly for static DHCPv6 assignment, normally for printers and servers but can also be used for PC's. Assigning the DUID is optional.
From what you have asked form above, I think you want to have PC generated DHCPv6 request leave your local remote LAN and cross the MPLS network back to your DHCPv6 server(s). By using these three lines on the local LAN interface:
ipv6 nd prefix default no-advertise
ipv6 nd managed-config-flag
ipv6 dhcp relay destination
will cause your 1800 series router to forward the PC's DHCPv6 request across the MPLS WAN.
One note, These instructions assume the MPLS provider supports IPv6 or has some provision to tunnel your IPv6 traffic OR you have a tunnel configure on the 1800 series router, I.E. Auto 6-to-4. If you use Auto 6-to-4 tunnel, the provider will only see IPv4 packets and all is good. There are MANY DIFFERENT options here.
Hope this helps
Windows IP Configuration
Host Name . . . . . . . . . . . . : --gone--
Primary Dns Suffix . . . . . . . : --gone--
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : --gone--
Ethernet adapter Local Area Connection* 15:
Media State . . . . . . . . . . . : Media disconnected
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