Cisco Systems 3560 Manual De Usuario

helper-address command can be a specific DHCP server IP address, or it can be the network address if 
other DHCP servers are on the destination network segment. Using the network address enables any 
DHCP server to respond to requests.

Beginning in privileged EXEC mode, follow these steps to specify the packet forwarding address:

To remove the DHCP packet forwarding address, use the no ip helper-address address interface 
configuration command. 

Enter global configuration mode.

interface vlan vlan-id

Create a switch virtual interface by entering a VLAN 
ID, and enter interface configuration mode.

ip address ip-address subnet-mask

Configure the interface with an IP address and an IP 
subnet.

ip helper-address address

Specify the DHCP packet forwarding address. 

The helper address can be a specific DHCP server 
address, or it can be the network address if other 
DHCP servers are on the destination network 
segment. Using the network address enables other 
servers to respond to DHCP requests.

If you have multiple servers, you can configure one 
helper address for each server.

Return to global configuration mode.

interface range port-range

 

 

or

interface interface-id

Configure multiple physical ports that are connected 
to the DHCP clients, and enter interface range 
configuration mode.

or

Configure a single physical port that is connected to 
the DHCP client, and enter interface configuration 
mode.

Define the VLAN membership mode for the port.

switchport access vlan vlan-id

Assign the ports to the same VLAN as configured in 
Step 2.

Return to privileged EXEC mode.

Verify your entries.

(Optional) Save your entries in the configuration file.