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RFC 4951
Title: Fail Over Extensions for Layer
2 Tunneling Protocol (L2TP) "failover"
Author: V. Jain, Ed.
Status: Standards Track
Date: August 2007
Mailbox: vipinietf@yahoo.com
Pages: 26
Characters: 53659
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-l2tpext-failover-12.txt
URL: http://www.rfc-editor.org/rfc/rfc4951.txt
Layer 2 Tunneling Protocol (L2TP) is a connection-oriented protocol
that has a shared state between active endpoints. Some of this shared
state is vital for operation, but may be 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 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. [STANDARDS TRACK]
This document is a product of the Layer Two Tunneling Protocol Extensions
Working Group of the IETF.
This is now a Proposed Standard Protocol.
STANDARDS TRACK: This document specifies an Internet standards track
protocol for the Internet community,and requests discussion and suggestions
for improvements.Please refer to the current edition of the Internet
Official Protocol Standards (STD 1) for the standardization state and
status of this protocol. Distribution of this memo is unlimited.
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