<dt><b>--dhcp-proxy[=&lt;ip addr&gt;]......</b></dt>
<dd>(IPv4 only) A normal DHCP relay agent is only used to forward the initial parts of
a DHCP interaction to the DHCP server. Once a client is configured, it
communicates directly with the server. This is undesirable if the
relay agent is adding extra information to the DHCP packets, such as
that used by
<b>--dhcp-circuitid</b>

and
<b>--dhcp-remoteid.</b>

A full relay implementation can use the RFC 5107 serverid-override
option to force the DHCP server to use the relay as a full proxy, with all
packets passing through it. This flag provides an alternative method
of doing the same thing, for relays which don't support RFC
5107. Given alone, it manipulates the server-id for all interactions
via relays. If a list of IP addresses is given, only interactions via
relays at those addresses are affected.</dd>