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Title : Unicast Address Sub-Option
Author(s) : S. De Cnodder, P. Mensch
Filename : draft-decnodder-dhc-rai-unicast-01.txt
Pages : 15
Date : 2006-8-21
In some network topologies, it is preferred to have a trusted network
element between the DHCP client and the L3 relay agent that adds the
DHCP relay-agent-information option but does not set the giaddr
field. They operate in Layer 2 mode and hence act as trusted Layer 2
relay agents. The replies from the server are broadcasted by the L3
relay agents to these L2 relay agents which must be avoided. This
document defines a new sub-option for the relay-agent-information
option. With this sub-option, the L3 relay agent will always unicast
the messages towards the trusted layer 2 DHCP relay agent with a
hardware address that is known in the network. The new sub-option is
called the "unicast-address" sub-option.
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