User Documentation

Version 1.2 / August 2020 Page 57 / 102

4.2.9 Configuration → Services

Services → DHCP Server (Tab Configuration)

Configuration → Services → DHCP Server → Tab “Configuration”

Function

In operating mode "IP Router", the built-in DHCP server can be used for allocating IP ad-

dresses on both LAN-side and WAN side. By default, the DHCP server is switched off.

Activate DHCP server

Enables the DHCP service. The device will answer to DHCP re-

quests on the selected interfaces with the supplied IP address

range and name server configuration.

Note: The IP address range must be in the same IP subnet as the

IP of the selected interface itself.

Activate DHCP relay

Enables the DHCP relay service. The device will forward all in-

coming DHCP requests to the given DHCP server. Please ensure

that the internal network (i.e. the network that is served by the re-

lay) is reachable from the DHCP server.

On following interfaces

Select the Interfaces that should use DHCP server or relay. Dis-

played interfaces depending on routing mode, integrated modem

and virtual interfaces.

Starting IP address

First IP address that can be assigned via DHCP

Ending IP address

Last IP address that can be assigned via DHCP

Note: Must be in the same IP subnet as Starting IP address.

DHCP lease time

Value between 3.000 s and 700.000 s

DHCP Relay

Alternatively, the Router can be configured as a DHCP relay. DHCP requests from clients

which require an IP address are then forwarded to the "real" DHCP server.

Automatic relay IP

Use the DHCP server of the DHCP lease of the device

itself. To make this option work at least one interface of

the device itself must be configured as DHCP client.

DHCP relay 1

server IP address

IP address to which DHCP requests will be forwarded

to.

DHCP relay 2

server IP address

IP address to which DHCP requests will be forwarded

to if first DHCP server is not available.