Enabling Dhcp Relay; Configuring An Ip Helper Address; Operating Notes; Verifying The Dhcp Relay Configuration - HP ProCurve 2910al Switch Manual

Enabling DHCP Relay

The DHCP Relay function is enabled by default on a ProCurve routing switch.
However, if DHCP has been disabled, you can re-enable it by entering the
following command at the global configuration level:
ProCurve(config)# dhcp-relay
To disable the DHCP Relay function, enter the no form of the command:
ProCurve(config)# no dhcp-relay

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:
ProCurve(config)# vlan 1
ProCurve(vlan-1)# ip helper-address <ip-addr>
To remove the DHCP server helper address, enter the no form of the
command:
ProCurve(vlan-1)# no ip helper-address < ip-addr >

Operating Notes

■ You can configure up to 4000 IP helper addresses on a routing switch. The
helper addresses are shared between the DHCP relay agent and UDP
forwarder feature.
■ A maximum of sixteen IP helper addresses is supported in each VLAN.

Verifying the DHCP Relay Configuration

Displaying the DHCP Relay Setting

Use the show config command (or show running for the running-config file) to
display the current DHCP Relay setting.
IP Routing Features
Configuring DHCP Relay
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