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2.
IPv6 address/prefix statically bound to the client's DUID and IAID.
3.
IPv6 address/prefix statically bound to the client's DUID and expected by the client.
4.
IPv6 address/prefix statically bound to the client's DUID.
5.
IPv6 address/prefix that was ever assigned to the client.
6.
Assignable IPv6 address/prefix in the address pool/prefix pool expected by the client.
7.
Assignable IPv6 address/prefix in the address pool/prefix pool.
8.
IPv6 address/prefix that was a conflict or passed its lease duration. If no IPv6 address/prefix is
assignable, the server does not respond.
If a client moves to another subnet, the DHCPv6 server selects an IPv6 address/prefix from the
address pool that matches the new subnet.
Conflicted IPv6 addresses can be assigned to other DHCPv6 clients only after the addresses are in
conflict for one hour.
DHCPv6 server tasks at a glance
Tasks at a glance
Perform one of the following tasks at minimum:
•
Configuring IPv6 prefix assignment
•
Configuring IPv6 address assignment
•
Configuring network parameters assignment
(Required.) Perform at least one task:
•
Configuring a DHCPv6 policy for IPv6 address and prefix assignment
•
Configuring the DHCPv6 server on an interface
(Optional.)
Allocating different IPv6 addresses to DHCPv6 clients with the same MAC
(Optional.)
Setting the DSCP value for DHCPv6 packets sent by the DHCPv6 server
(Optional.)
Configuring DHCPv6 binding auto backup
(Optional.)
Advertising subnets assigned to clients
(Optional.)
Applying a DHCPv6 address pool to a VPN instance
(Optional.)
Configuring the DHCPv6 server security features
(Optional.)
Enabling the DHCPv6 server to advertise IPv6 prefixes
(Optional.)
Enabling DHCPv6 logging on the DHCPv6 server
Configuring IPv6 prefix assignment
About IPv6 prefix assignment
Use the following methods to configure IPv6 prefix assignment:
•
Configure a static IPv6 prefix binding in an address pool—If you bind a DUID and an IAID
to an IPv6 prefix, the DUID and IAID in a request must match those in the binding before the
DHCPv6 server can assign the IPv6 prefix to the DHCPv6 client. If you only bind a DUID to an
IPv6 prefix, the DUID in the request must match the DUID in the binding before the DHCPv6
server can assign the IPv6 prefix to the DHCPv6 client.
•
Apply a prefix pool to an address pool—The DHCPv6 server dynamically assigns an IPv6
prefix from the prefix pool in the address pool to a DHCPv6 client.
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Troubleshooting
