NSIS Operation over IP Tunnels
RFC 5979
Internet Engineering Task Force (IETF) C. Shen
Request for Comments: 5979 H. Schulzrinne
Category: Experimental Columbia U.
ISSN: 2070-1721 S. Lee
Samsung
J. Bang
Samsung AIT
March 2011
NSIS Operation over IP Tunnels
Abstract
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
that 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.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for examination, experimental implementation, and
evaluation.
This document defines an Experimental Protocol for the Internet
community. This document is a product of the Internet Engineering
Task Force (IETF). It represents the consensus of the IETF
community. It has received public review and has been approved for
publication by the Internet Engineering Steering Group (IESG). Not
all documents approved by the IESG are a candidate for any level of
Internet Standard; see Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc5979.
Shen, et al. Experimental [Page 1]
RFC 5979 NSIS Operation over IP Tunnels March 2011
Copyright Notice
Copyright (c) 2011 IETF Trust and the persons identified as the
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Contributions published or made publicly available before November
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Without obtaining an adequate license from the person(s) controlling
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than English.
Shen, et al. Experimental [Page 2]
RFC 5979 NSIS Operation over IP Tunnels March 2011
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 6
3.1. IP Tunneling Protocols . . . . . . . . . . . . . . . . . . 6
3.2. NSIS QoS Signaling in the Presence of IP Tunnels . . . . . 7
4. Design Overview . . . . . . . . . . . . . . . . . . . . . . . 10
4.1. Design Requirements . . . . . . . . . . . . . . . . . . . 10
4.2. Overall Design Approach . . . . . . . . . . . . . . . . . 11
4.3. Tunnel Flow ID for Different IP Tunneling Protocols . . . 13
5. NSIS Operation over Tunnels with Preconfigured QoS Sessions . 14
5.1. Sender-initiated Reservation . . . . . . . . . . . . . . . 14
5.2. Receiver-Initiated Reservation . . . . . . . . . . . . . . 15
6. NSIS Operation over Tunnels with Dynamically Created QoS
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