dhcp server forbidden-ip

Use dhcp server forbidden-ip to exclude IP addresses from dynamic allocation globally.

Use undo dhcp server forbidden-ip to remove the configuration.

Syntax

dhcp server forbidden-ip start-ip-address [ end-ip-address ] [ vpn-instance vpn-instance-name ]

undo dhcp server forbidden-ip start-ip-address [ end-ip-address ] [ vpn-instance vpn-instance-name ]

Default

No IP addresses are excluded from dynamic allocation globally.

Views

System view

Predefined user roles

network-admin

mdc-admin

Parameters

start-ip-address: Specifies the start IP address.

end-ip-address: Specifies the end IP address, which cannot be lower than the start-ip-address. If you do not specify this argument, only the start-ip-address is excluded from dynamic allocation.

vpn-instance vpn-instance-name: Specifies an MPLS L3VPN instance by its name, a case-sensitive string of 1 to 31 characters. If the excluded IP addresses belong to the public network, do not specify this option.

Usage guidelines

The IP 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 IP address is in a static DHCP binding, the address can still be assigned to the client.

The address or address range specified in the undo dhcp server forbidden-ip command must be the same as that specified in the dhcp server forbidden-ip command. To remove an IP address from the specified address range, you must remove the entire address range.

You can execute this command multiple times to exclude multiple IP address ranges from dynamic allocation.

Examples

# Exclude the IP addresses of 10.110.1.1 through 10.110.1.63 from dynamic allocation globally.

<Sysname> system-view
[Sysname] dhcp server forbidden-ip 10.110.1.1 10.110.1.63

Related commands

forbidden-ip

static-bind