Westermo RedFox Series - Manual (Page 515)

Westermo OS Management Guide
Version 4.17.0-0
23.1 Overview of DHCP Relay Agent Support
The table below lists the features available in the WeOS DHCP Relay Agent.
Feature Web CLI General Description
General DHCP Relay settings
Enable/disable Relay Agent
X X Section 23.1.1
Define interfaces to serve X X -”-
DHCP server IP address X X -”-
DHCP server UDP port X -”-
DHCP Option 82 Section 23.1.2
Enable/Disable DHCP Option 82 X X -”-
Default Policy X X -”-
Default Circuit-ID type X X -”-
Remote-ID X X -”-
DHCP Proxy Mode Section 23.1.3
Force DHCP Option 54 X -”-
Per-Port DHCP Relay settings
Enable/Disable DHCP Relay
X X Section 23.1.4
DHCP Option 82
Policy X X Section 23.1.2
Circuit-ID type X X -”-
23.1.1 Introduction to DHCP Relay Agents
One of the main reasons for using DHCP relay agents is to simplify DHCP man-
agement in larger infrastructures. Instead of deploying and managing a DHCP
server on every LAN, a DHCP relay agent present on the LAN can forward DHCP
messages between local DHCP clients, and a central DHCP server.
Fig. 23.1 can be used to illustrate the use of DHCP relays and a central DHCP
server.
❼ (V)LAN interfaces: The DHCP relay agents (here RA1-RA3) serve DHCP clients
(here PC1-PC6) on the local LANs. A DHCP relay can serve a single LAN (Re-
lay Agent 1 & 3) or multiple LANs (Relay Agent 2). In WeOS the LANs to
serve is selected by configuring which (VLAN) network interfaces the relay
agent should listen on.
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