ipv6 dhcp server forbidden-address

Use ipv6 dhcp server forbidden-address to exclude specified IPv6 addresses from dynamic allocation.

Use undo ipv6 dhcp server forbidden-address to remove the configuration.

Syntax

ipv6 dhcp server forbidden-address start-ipv6-address [ end-ipv6-address ]

undo ipv6 dhcp server forbidden-address start-ipv6-address [ end-ipv6-address ]

Default

Except for the DHCPv6 server address, all IPv6 addresses in a DHCPv6 address pool are assignable.

Views

System view

Predefined user roles

network-admin

Parameters

start-ipv6-address: Specifies the start IPv6 address.

end-ipv6-address: Specifies the end IPv6 address, which cannot be lower than start-ipv6-address. If you do not specify an end IPv6 address, only the start IPv6 address is excluded from dynamic allocation. If you specify an end IPv6 address, the IP addresses from start-ipv6-address to end-ipv6-address are all excluded from dynamic allocation.

Usage guidelines

You can exclude multiple IP address ranges from dynamic allocation.

The IPv6 addresses of some devices such as the gateway and FTP server cannot be assigned to clients. Use this command to exclude such addresses from dynamic allocation.

If the excluded IPv6 address is in a static binding, the address can still be assigned to the client.

The address or address range specified in the undo form of the command must be the same as the address or address range specified in the command. To remove an IP address that has been specified as part of an address range, you must remove the entire address range.

Examples

# Exclude IPv6 addresses of 2001:10:110::1 through 2001:10:110::20 from dynamic assignment.

<Sysname> system-view
[Sysname] ipv6 dhcp server forbidden-address 2001:10:110::1 2001:10:110::20

Related commands

• ipv6 dhcp server forbidden-prefix

• static-bind