DHCP Server

Table 6–5: Network: DHCP Relay Configuration Parameters (Continued)

Parameter

Description

 

 

 

 

Relay

The IP address of the central DHCP server where requests are sent.

Requests to

 

DHCP Server

 

 

 

Enable DHCP

For a Central DHCP Relay Agent, selecting this checkbox allows the device to act

Relay Over

as a VPN Relay agent and supports DHCP requests arriving over VPN tunnels

VPN

using IKE. The device will forward the requests onto the DHCP server.

 

 

Remote DHCP

Select this option if the device is connected to a client network that sends DHCP

Relay Agent

lease requests. In this configuration, the device listens for DHCP requests from its

 

LAN. This option is recommended for an device in a remote office that is relaying

 

DHCP requests to a central DHCP server in the head office.

 

 

VPN Tunnel

If Remote DHCP Relay Agent is selected, this parameter identifies the VPN Tunnel

 

the X family device uses to pass DHCP requests to the central DHCP relay agent.

 

 

Note If you are using DHCP Relay over VPN, any LAN devices attached to the Remote VPN Relay agent that are not using DHCP must be configured as Static Reservations. (See “Static Reservations” on page 174). To configure, navigate to Network > DHCP Server. Then, select the Static Reservations page.

You can only use DHCP Relay Over VPN when the VPN between two devices is configured to use Internet Key Exchange (IKE).

Configure DHCP Relay as a Central DHCP Relay in the Main Office

STEP 1

STEP 2

STEP 3

STEP 4

From the LSM menu, select Network > DHCP Server. Then, click the DHCP Relay tab.

On the DHCP Relay page, check Enable DHCP Request Relaying to enable DHCP Relay.

Select Central DHCP Relay.

With this configuration, the device is configured to receive requests from a remote agent which are then forwarded to the DHCP server on its LAN.

In the Relay Requests to DHCP Server field, type the address of the central DHCP server.

If you want the device to act as a Central VPN Relay agent, check Enable DHCP Relay over VPN.

Note Make sure that the tunnels connecting to device configured as the Remote VPN Relay agent are configured as Destination network addresses assigned by DHCP in the Tunnel Setup section of the VPN - Create Security IPSec Configuration page.

STEP 5 Click Apply to save the configuration.

X Family LSM User’s Guide V 2.5.1

173