Configuring an IP helper address

To add the IP address of a DHCP server for a specified VLAN on a routing switch, enter the ip helper-address command at the VLAN configuration level as in the following example:

switch(config)# vlan 1
switch(vlan-1)# ip helper-address ip-addr 

To remove the DHCP server helper address, enter the no form of the command:

switch(vlan-1)# no ip helper-address ip-addr