mac

the address prefix, which is allowed to be between 3 and 128, and 64 by default, the size

of the pool will be determined by <prefix-length> if it has been specified.

<ipv6-pool-end-address> and <prefix-length> alternative options to determine the size

of the IPv6 address pool. If <prefix-length> is 64 and the eui-64 option has been

configured, the DHCPv6 server will allocate IPv6 addresses according to the EUI-64

standard, or the DHCPv6 server will be allocating addresses sequentially.

Default: No address pool is configured by default.

Command Mode: DHCPv6 Address Pool Configuration Mode.

Usage Guide: This command configures the address pool for the DHCPv6 server to

allocate addresses, only one address range can be configured for each address pool. To

be noticed, if the DHCPv6 server has been enabled, and the length of the IPv6 address

prefix has been configured, the length of the prefix in the address pool should be no less

than the length of the prefix of the IPv6 address of the respective layer three interfaces in

the switch. If <ipv6-pool-end-address> is bigger than <ipv6-pool-start-address>, this

command returns at once.

Example: To configure the address range for address pool as

2001:da8:123::100-2001:da8:123::200.

Switch(dhcp-1-config)#network-address 2001:da8:123::100 2001:da8:123::200

Relative Command: excluded-address

16.20 prefix-delegation

Command: prefix-delegation <ipv6-prefix/prefix-length> <client-DUID> [iaid <iaid>]

[lifetime <valid-time> <preferred-time>]

no prefix-delegation <ipv6-prefix/prefix-length> <client-DUID> [iaid

<iaid>]

Function: To configure dedicated prefix delegation for the specified user. The no form of

this command will remove the dedicated prefix delegation.

Parameters: <ipv6-prefix/prefix-length> is the length of the prefix to be allocated to the

client. <client-DUID> is the DUID of the client. DUID with the type of DUID-LLT and

DUID-LL are supported, the DUID of DUID-LLT type should be of 14 characters. <iaid> is

the value to be appended in the IA_PD field of the clients‘ requests. <valid-time> and

<preferred-time> are the valid life time and the preferred life time of the IPv6 address

allocated to the clients respectively, in seconds, and its value is allowed between 1 and

31536000. However <preferred-time> should be less than <valid-time>. If not

configured, the default <valid-time> will be 2592000, while <preferred-time> will be

604800.