Configuration Guide Configuring DHCPv6
iana-address prefix ipv6-prefix/prefix-length [ lifetime { valid-lifetime | preferred-lifetime } ]
ipv6-prefix/prefix-length: Indicates an IPv6 address prefix and the prefix length.
lifetime: Sets the valid time of the address allocated to a client. This keyword must be configured together
with valid-lifetime and preferred-lifetime.
valid-lifetime: Indicates the valid time of the address allocated to a client.
preferred-lifetime: Indicates the time when an address is preferentially allocated to a client.
Interface configuration mode
Run the iana-address prefix command to configure IA_NA address prefixes for a DHCPv6 server, some of
which are allocated to the client.
When receiving an IA_NA address request from a client, the DHCPv6 server selects an available address
according to the IA_NA address range and allocates the address to the client. When the client does not use
this address, the DHCPv6 server marks this address as available for another client.
 Configuring Prefixes of Statically Bound Addresses on the DHCPv6 Server
prefix-delegation ipv6-prefix/prefix-length client-DUID [ lifetime ]
ipv6-prefix/prefix-length: Indicates an IPv6 address prefix and the prefix length.
client-DUID: Indicates the DUID of a client.
lifetime: Sets the time when the client can use this prefix.
DHCPv6 pool configuration mode
You can run the prefix-delegation command to manually configure a prefix list for an IA_PD of a client and
specify the valid time of these prefixes.
Use the client-DUID parameter to specify the client to which the address prefix is allocated. The address
prefix will be allocated to the first IA_PD of the client.
After receiving a request for the address prefix from the client, the DHCPv6 server checks whether a static
binding is available. If yes, the DHCPv6 server directly returns the static binding. If not, the DHCPv6 server
allocates the address prefix from another prefix source.
 Configuring the DCHPv6 Server to Allocate Prefixes from a local prefix pool
prefix-delegation pool poolname [lifetime { valid-lifetime | preferred-lifetime } ]
poolname: Indicates the name of a user-defined local prefix pool.
lifetime: Sets the valid time of the prefix allocated to a client. This keyword must be configured together with
valid-lifetime and preferred-lifetime.
valid-lifetime: Indicates the valid time of the prefix allocated to the client.
preferred-lifetime: Indicates the time when a prefix is preferentially allocated to a client.
DHCPv6 pool configuration mode
Run the prefix-delegation pool command to configure a prefix pool for a DHCPv6 server to allocate
prefixes to clients. The ipv6 local pool command is used to configure a prefix pool.
When receiving a prefix request from a client, the DHCPv6 server selects an available prefix from the prefix