Fig. 23.5, Example – Westermo RedFox Series User Manual
Page 524
Westermo OS Management Guide
Version 4.17.0-0
Server
DHCP
Internet/Intranet
DHCP
Server
Routers (possibly
running VRRP)
Focal Point
FRNT
IP:10.1.2.3
2
1
3 4
6
5
RA1
7
2
1
3 4
6
5
RA2
7
2
1
3 4
5
6
RA5
2
1
3 4
5
6
RA4
2
1
3 4
5
6
RA3
Figure 23.5: Example with multiple DHCP Relay Agents within the same VLAN
(port 1-6 on all RAs are assumed to be on the same VLAN, e.g., VLAN 1).
Example
dhcp-relay
iface vlan1
server 10.1.2.3
option82 discard
port 5-6
no enable
end
end
❼ DHCP relay has been enabled on interface vlan1 (this assumes that ports
1-6 are all associated with VLAN 1).
❼ A single DHCP server has been configured (here 10.1.2.3). As of WeOS
v4.17.0, up to two DHCP servers can be configured.
❼ Option 82 is enabled, with policy discard. Option 82 information will be
added to all incoming requests. Packets which already include option 82
information will be discarded. Default settings for circuit-id (port name) and
remote-id (base-MAC) will be used.
❼ DHCP requests coming in on port 5 or 6 will be ignored by the relay agent.
No DHCP snooping will be done on those ports, thus a DHCP request being
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