H3C S6812 Series Command Reference Manual page 953

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 through
end-ipv6-address are all excluded from dynamic allocation.
Usage guidelines
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 DHCPv6 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.
You can execute this command multiple times to exclude multiple IPv6 address ranges from dynamic
allocation.
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
ipv6 dhcp server forbidden-prefix
Use ipv6 dhcp server forbidden-prefix to exclude IPv6 prefixes in the DHCPv6 prefix pool from
dynamic allocation.
Use undo ipv6 dhcp server forbidden-prefix to remove the configuration.
Syntax
ipv6 dhcp server forbidden-prefix start-prefix/prefix-len [ end-prefix/prefix-len ]
undo ipv6 dhcp server forbidden-prefix start-prefix/prefix-len [ end-prefix/prefix-len ]
Default
No IPv6 prefixes in the DHCPv6 prefix pool are excluded from dynamic allocation.
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