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This draft is a work item of the Layer Two Tunneling Protocol Extensions Working Group of the IETF.
Title : Fail Over extensions for L2TP "failover"
Author(s) : V. Jain
Filename : draft-ietf-l2tpext-failover-12.txt
Pages : 22
Date : 2007-2-21
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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