IPv6 - ipv6 nd prefix command
When implementing a stateful DHCPv6 server on a Cisco IOS device, you issue the following command on the interface that will be used as the DHCP server source.
ipv6 nd prefix
This command has the following additional parameters:
- IPv6 prefix value: You can specify a particular prefix to be used by the DHCPv6 server.
default- instead of the prefix value, you can specify the keyworddefaultto use the prefix of the IPv6 address assigned to the interface.-
- Preferred and Valid lifetimes - These values must also be indicated to inform the receiver of the information of the length of time for which the IPv6 addresses are valid.
no-autoconfig- This keyword must be used at the end of the command to indicate that stateless autoconfiguration will not be used.
The following is an example of this command using a particular prefix, and values of 14400 for both preferred and valid lifetimes:
DHCPV6(config-if)#ipv6 nd prefix 2001:1111:1111:1111::/64 14400 14400 no-autoconfig
The following is an example of the same command using the default keyword, which indicates that the prefix of the configured IPv6 address of the interface should be used:
DHCPV6(config-if)#ipv6 nd prefix default 14400 14400 no-autoconfig
The no-autoconfig keyword in both cases indicates that DHCPv6 and not stateless autoconfiguration will be used.
Links:
https://forum.networklessons.com/t/cisco-dhcpv6-server-configuration/1116/86?u=lagapidis
https://networklessons.com/ipv6/cisco-dhcpv6-server-configuration/