A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Extension of DHCP Leasequery in Bridging/Switching networks
Author(s) : B. Joshi, P. Kurapati
Filename : draft-joshi-dhcp-lease-query-ext-01.txt
Pages : 19
Date : 2006-8-4
As per industry trends, Access Networks have been migrating from
traditional ATM based networks to Ethernet networks. In Ethernet
based access networks, Access Concentrators are typically configured
to act as traditional bridge. These Access Concentrators also act as
relay agents and relay DHCP messages between hosts and DHCP servers.
It also maintains and updates lease/location information while
relaying the DHCP messages. Access Concentrators may use the lease/
location information for anti-spoofing, data forwarding etc. This
lease/location information is lost if an Access Concentrator gets
rebooted. RFC 4388 [4] has defined a new message type DHCPLEASEQUERY
to address similar limitation in Routed Access Networks.
This document initially gives an overview of the functioning of the
Access Concentrator acting as a relay agent in a Layer 2 aggregation
network. The limitation[as mentioned above] in a typical switched/
bridged[layer 2] is then discussed followed by the proposal to extend
the DHCPLEASEQUERY message to address this limitation.
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