H3C Technologies H3C S5560 Series Switches - Manual (Page 190)

175
Step Command Remarks
6. Configure static or
dynamic prefix
assignment.
• Configure a static prefix binding:
static-bind prefix prefix/prefix-len
duid duid [ iaid iaid ]
[ preferred-lifetime preferred-lifetime
valid-lifetime valid-lifetime ]
• Apply the prefix pool to the address
pool:
prefix-pool prefix-pool-number
[ preferred-lifetime preferred-lifetime
valid-lifetime valid-lifetime ]
Use at least one command.
By default, no static or dynamic
prefix assignment is configured
for an address pool.
To add multiple static IPv6 prefix
bindings, use the static-bind
prefix command.
Configuring IPv6 address assignment
Use one of the following methods to configure IPv6 address assignment:
• Configure a static IPv6 address binding in an address pool.
If you bind a DUID and an IAID to an IPv6 address, the DUID and IAID in a request must match
those in the binding before the DHCPv6 server can assign the IPv6 address to the requesting client.
If you only bind a DUID to an IPv6 address, the DUID in a request must match the DUID in the
binding before the DHCPv6 server can assign the IPv6 address to the requesting client.
• Specify a subnet and address ranges in an address pool.
{
Non-temporary address assignment—The server selects addresses from the non-temporary
address range specified by the address range command. If no non-temporary address range is
specified, the server selects addresses on the subnet specified by the network command.
{
Temporary address assignment—The server selects addresses from the temporary address
range specified by the temporary address range command. If no temporary address range is
specified in the address pool, the DHCPv6 server cannot assign temporary addresses to clients.
Configuration guidelines
• You can specify only one non-temporary address range and one temporary address range in an
address pool.
• The address ranges specified by the address range and temporary address range commands must
be on the subnet specified by the network command. Otherwise, the addresses are unassignable.
• Only one prefix pool can be applied to an address pool. You can apply a prefix pool that has not
been created to an address pool. The setting takes effect after the prefix pool is created.
• An IPv6 address can be bound to only one DHCPv6 client. You cannot modify bindings that have
been created. To change the binding for a DHCPv6 client, you must delete the existing binding first.
• Only one subnet can be specified in an address pool. If you use the network command multiple
times in a DHCPv6 address pool, the most recent configuration takes effect. If you use this command
to specify only new lifetimes, the settings do not affect existing leases. The IPv6 addresses assigned
after the modification will use the new lifetimes.
Configuration procedure
To configure IPv6 address assignment: