I-D Action:draft-ietf-nsis-tunnel-13.txt

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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Next Steps in Signaling Working Group of the IETF.


	Title           : NSIS Operation Over IP Tunnels
	Author(s)       : C. Shen, et al.
	Filename        : draft-ietf-nsis-tunnel-13.txt
	Pages           : 27
	Date            : 2010-07-26

NSIS Quality of Service (QoS) signaling enables applications to
perform QoS reservation along a data flow path.  When the data flow
path contains IP tunnel segments, NSIS QoS signaling has no effect
within those tunnel segments.  Therefore, the resulting tunnel
segments could become the weakest QoS link and invalidate the QoS
efforts in the rest of the end-to-end path.  The problem with NSIS
signaling within the tunnel is caused by the tunnel encapsulation
which masks packets' original IP header fields.  Those original IP
header fields are needed to intercept NSIS signaling messages and
classify QoS data packets.  This document defines a solution to this
problem by mapping end-to-end QoS session requests to corresponding
QoS sessions in the tunnel, thus extending the end-to-end QoS
signaling into the IP tunnel segments.

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