Reference Guide

ip dhcp server
Enters DHCP mode.
Syntax
ip dhcp server
Parameters None
Default Not configured
Command Mode CONFIGURATION
Usage
Information
This command is used to enter DHCP mode.
Example
OS10(config)# ip dhcp server
OS10(conf-dhcp)#
Supported
Releases
10.2.0E or later
ip helper-address
Configure the DHCP server address. Forwards UDP broadcasts received on an interface to the DHCP server. You can configure
multiple helper addresses per interface by repeating the same command for each DHCP server address.
Syntax
ip helper-address address [vrf vrf-name]
Parameters
● address — Enter the IPv4 address to forward UDP broadcasts to the DHCP server in the A.B.C.D
format.
● vrf vrf-name — (Optional) Enter the keyword vrf and then the name of the VRF through which
the host address can be reached.
Default Disabled
Command Mode INTERFACE
Usage
Information
The DHCP server is available on L3 interfaces only. The no version of this command returns the value to
the default.The client-facing and server-facing interfaces must be in the same VRF.
Example (IPv4)
OS10(config)# interface eth 1/1/22
OS10(conf-if-eth1/1/22)# ip helper-address 20.1.1.1 vrf blue
Supported
Releases
10.2.0E or later
ipv6 helper-address
Configure the DHCPv6 server address. Forwards UDP broadcasts received from IPv6 clients to the DHCPv6 server. You can
configure multiple helper addresses per interface by repeating the same command for each DHCPv6 server address.
Syntax
ipv6 helper-address ipv6-address [vrf vrf-name]
Parameters
● vrf vrf-name — (Optional) Enter the keyword vrf and then the name of the VRF through which
the host address can be reached.
● ipv6–address — Specify the DHCPv6 server address in the A::B format.
Defaults Disabled
Command Mode INTERFACE
Usage
Information
The no version of this command deletes the IPv6 helper address.
Use this command on the interfaces where the DHCPv6 clients connect to forward the packets from
clients to DHCPv6 server and vice-versa.
System management 471