Alcatel-Lucent 6850-48 Guida Di Rete

Quick Steps for Setting Up DHCP Relay

Configuring DHCP Relay

page 31-4

OmniSwitch AOS Release 6 Network Configuration Guide

You should configure DHCP Relay on switches where packets are routed between IP networks.

There is no separate command for enabling or disabling the relay service. DHCP Relay is automatically 
enabled on the switch whenever a DHCP server IP address is defined. To set up DHCP Relay, proceed as 
follows:

1 Identify the IP address of the DHCP server. Where the DHCP server has IP address 128.100.16.1, use 
the following command:

-> ip helper address 128.100.16.1 

2 Set the forward delay timer for the BOOTP/DHCP relay. To set the timer for a 15 second delay, use the 
following command:

-> ip helper forward delay 15

3 Set the maximum hop count value. To set a hop count of 3, use the following command:

-> ip helper maximum hops 3 

Note. Optional. To verify the DHCP Relay configuration, enter the 

 command. The display 

shown for the DHCP Relay configured in the above Quick Steps is shown here:

-> show ip helper

Forward Delay (seconds) = 15

Max number of hops     = 3

Forward option 

= standard

Forwarding Address:

128.100.16.1 

For more information about this display, see the “DHCP Relay” chapter in the OmniSwitch CLI Reference 
Guide.