Name: draft-ietf-l2tpext-failover-04
Title: Fail Over extensions for L2TP 'failover'
State: Active
Authors: Vipin Jain
Group: Layer Two Tunneling Protocol Extensions (l2tpext)
Date: 2004-09-13
L2TP is a connection-oriented protocol that has shared state between active
endpoints. Some of this shared state is vital for operation but may be
rather volatile in nature, such as packet sequence numbers used on the L2TP
Control Connection. When failure of one side of a control connection
occurs, a new control connection is created and associated with the old
connection by exchanging information about the old connection. Such a
mechanism is not intended as a replacement for an active fail over with
some mirrored connection states, but as an aid just for those parameters
that are particularly difficult to have immediately available. Protocol
extensions to L2TP defined in this document are intended to facilitate
state recovery, providing additional resiliency in an L2TP network and
improving a remote system's layer 2 connectivity.
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