CLI Guide

Switch Management Commands 2026
The DHCP for IPv6 client, server, and relay functions are mutually exclusive
on an interface. When one of these functions is already enabled and a user
tries to configure a different function on the same interface, a message is
displayed.
Example
console#configure
console(config)#service dhcpv6
console(config)# ipv6 dhcp pool pool1
console(config-dhcp6s-pool)# address prefix-delegation 2001::/64
00:01:32:00:32:00
console(config-dhcp6s-pool)# exit
console(config)#interface vlan 10
console(config-if-vlan10)#ipv6 dhcp server pool1
console(config-if-vlan10)#
prefix-delegation
Use the prefix-delegation command in IPv6 DHCP Pool Configuration mode
to define multiple IPv6 prefixes within a pool for distributing to specific
DHCPv6 Prefix delegation clients.
Syntax
prefix-delegation ipv6-prefix/prefix-length client-DUID [name hostname]
[valid-lifetime {valid-lifetime | infinite}] [preferred-lifetime {preferred-
lifetime | infinite}]
no prefix-delegation ipv6-prefix/prefix-length
• prefix/prefix-length—Delegated IPv6 prefix.
• client-DUID—Client DUID (e.g. 00:01:00:09:f8:79:4e:00:04:76:73:43:76').
• hostname—Client hostname used for logging and tracing. (Range: 0-31
characters.) The command allows spaces in the host name when specified
in double quotes. For example, console(config)#snmp-server host “host
name”
is allowed.
• valid-lifetime—Valid lifetime for delegated prefix. (Range: 0-4294967295
seconds) or use the keyword infinite. Using the value 0 for the valid-
lifetime sets the value to the default.
• preferred-lifetime—Preferred lifetime for delegated prefix. (Range: 0-
4294967295 seconds) or use the keyword infinite. Using the value 0 for the
preferred-lifetime sets the value to the default.