[dhcwg] I-D ACTION:draft-ietf-dhc-agent-subnet-selection-03.txt

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This draft is a work item of the Dynamic Host Configuration Working Group of the IETF.

	Title		: Link Selection sub-option for the Relay Agent 
                          Information Option
	Author(s)	: K. Kinnear, M. Stapp, R. Johnson, J. Kumarasamy
	Filename	: draft-ietf-dhc-agent-subnet-selection-03.txt
	Pages		: 8
	Date		: 29-Apr-02
	
In RFC 2131, the giaddr specifies an IP address which determines both
a subnet and thereby a link on which a DHCP client resides as well as
an IP address which can be used to communicate with the relay agent.
The subnet-selection option [RFC 3011] allows these functions of the
giaddr to be split so that when one entity is performing as a DHCP
proxy, it can specify the subnet/link from which to allocate an IP
address which is different from the IP address with which it desires
to communicate with the DHCP server.  Analgous situations exist where
the relay agent needs to specify the subnet/link on which a DHCP
client resides which is different from an IP address which can be
used to communicate with the relay agent.  The link-selection sub-
option (specified here) of the relay-agent-information option allows
a relay agent to do this.

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