Westermo RedFox Series - Manual (Page 487)

Westermo OS Management Guide
Version 4.17.0-0
Chapter 22
DHCP Server
The WeOS DHCP server is capable of handing out IP settings to hosts (DHCP
clients) on local and remote IP subnets. For each defined IP subnet, the DHCP
server can assign IP addresses dynamically from a pool of addresses, but also
statically based on
❼ the port the (DHCP) client is connected to (”one IP per port”, DHCP op-
tion 82),
❼ the DHCP client identifier provided by the connecting client, or
❼ the MAC address of the connecting client
To serve clients on remote IP subnets, DHCP relay agents would be used to for-
ward the DHCP messages between the clients and the DHCP server. In WeOS you
can even configure a DHCP relay agent on the same unit as the DHCP server –
this is useful if you wish to hand out addresses per port (DHCP option 82) on the
DHCP server unit itself. For more information on configuring DHCP relay agents,
see
chapter 23 .
The WeOS DHCP server is also able to act as a (proxy) DNS server for the DHCP
clients it serves (see
section 19.3.4 ).
Being part of an embedded system, the WeOS DHCP server does not store the
current set of leases in persistent storage. In most use cases this is fine, how-
ever if it necessary that the current lease table survives a reboot you are recom-
mended to use a dedicated DHCP server instead.
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