draft-ietf-ccamp-dpm-04.txt   draft-ietf-ccamp-dpm-05.txt 
Network Working Group W. Sun, Ed. Network Working Group W. Sun, Ed.
Internet-Draft SJTU Internet-Draft SJTU
Intended status: Standards Track G. Zhang, Ed. Intended status: Standards Track G. Zhang, Ed.
Expires: April 3, 2012 CATR Expires: August 4, 2012 CATR
Oct 2011 February 1, 2012
Label Switched Path (LSP) Data Path Delay Metrics in Generalized MPLS/ Label Switched Path (LSP) Data Path Delay Metrics in Generalized MPLS/
MPLS-TE Networks MPLS-TE Networks
draft-ietf-ccamp-dpm-04.txt draft-ietf-ccamp-dpm-05.txt
Abstract Abstract
When setting up a label switched path (LSP) in Generalized MPLS and When setting up a label switched path (LSP) in Generalized MPLS and
MPLS/TE networks, the completion of the signaling process does not MPLS/TE networks, the completion of the signaling process does not
necessarily mean that the cross connection along the LSP have been necessarily mean that the cross connection along the LSP have been
programmed accordingly and in a timely manner. Meanwhile, the programmed accordingly and in a timely manner. Meanwhile, the
completion of signaling process may be used by applications as completion of signaling process may be used by applications as
indication that data path has become usable. The existence of this indication that data path has become usable. The existence of this
delay and the possible failure of cross connection programming, if delay and the possible failure of cross connection programming, if
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Table of Contents Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 5 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Conventions Used in This Document . . . . . . . . . . . . . . 6 2. Conventions Used in This Document . . . . . . . . . . . . . . 5
3. Overview of Performance Metrics . . . . . . . . . . . . . . . 7 3. Overview of Performance Metrics . . . . . . . . . . . . . . . 6
4. Terms used in this document . . . . . . . . . . . . . . . . . 8 4. Terms used in this document . . . . . . . . . . . . . . . . . 7
5. A singleton Definition for RRFD . . . . . . . . . . . . . . . 9 5. A singleton Definition for RRFD . . . . . . . . . . . . . . . 8
5.1. Motivation . . . . . . . . . . . . . . . . . . . . . . . . 9 5.1. Motivation . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2. Metric Name . . . . . . . . . . . . . . . . . . . . . . . 9 5.2. Metric Name . . . . . . . . . . . . . . . . . . . . . . . 8
5.3. Metric Parameters . . . . . . . . . . . . . . . . . . . . 9 5.3. Metric Parameters . . . . . . . . . . . . . . . . . . . . 8
5.4. Metric Units . . . . . . . . . . . . . . . . . . . . . . . 9 5.4. Metric Units . . . . . . . . . . . . . . . . . . . . . . . 8
5.5. Definition . . . . . . . . . . . . . . . . . . . . . . . . 9 5.5. Definition . . . . . . . . . . . . . . . . . . . . . . . . 8
5.6. Discussion . . . . . . . . . . . . . . . . . . . . . . . . 10 5.6. Discussion . . . . . . . . . . . . . . . . . . . . . . . . 9
5.7. Methodologies . . . . . . . . . . . . . . . . . . . . . . 11 5.7. Methodologies . . . . . . . . . . . . . . . . . . . . . . 10
6. A singleton Definition for RSRD . . . . . . . . . . . . . . . 12 6. A singleton Definition for RSRD . . . . . . . . . . . . . . . 11
6.1. Motivation . . . . . . . . . . . . . . . . . . . . . . . . 12 6.1. Motivation . . . . . . . . . . . . . . . . . . . . . . . . 11
6.2. Metric Name . . . . . . . . . . . . . . . . . . . . . . . 12 6.2. Metric Name . . . . . . . . . . . . . . . . . . . . . . . 11
6.3. Metric Parameters . . . . . . . . . . . . . . . . . . . . 12 6.3. Metric Parameters . . . . . . . . . . . . . . . . . . . . 11
6.4. Metric Units . . . . . . . . . . . . . . . . . . . . . . . 12 6.4. Metric Units . . . . . . . . . . . . . . . . . . . . . . . 11
6.5. Definition . . . . . . . . . . . . . . . . . . . . . . . . 13 6.5. Definition . . . . . . . . . . . . . . . . . . . . . . . . 12
6.6. Discussion . . . . . . . . . . . . . . . . . . . . . . . . 13 6.6. Discussion . . . . . . . . . . . . . . . . . . . . . . . . 12
6.7. Methodologies . . . . . . . . . . . . . . . . . . . . . . 14 6.7. Methodologies . . . . . . . . . . . . . . . . . . . . . . 13
7. A singleton Definition for PRFD . . . . . . . . . . . . . . . 15 7. A singleton Definition for PRFD . . . . . . . . . . . . . . . 14
7.1. Motivation . . . . . . . . . . . . . . . . . . . . . . . . 15 7.1. Motivation . . . . . . . . . . . . . . . . . . . . . . . . 14
7.2. Metric Name . . . . . . . . . . . . . . . . . . . . . . . 15 7.2. Metric Name . . . . . . . . . . . . . . . . . . . . . . . 14
7.3. Metric Parameters . . . . . . . . . . . . . . . . . . . . 15 7.3. Metric Parameters . . . . . . . . . . . . . . . . . . . . 14
7.4. Metric Units . . . . . . . . . . . . . . . . . . . . . . . 15 7.4. Metric Units . . . . . . . . . . . . . . . . . . . . . . . 14
7.5. Definition . . . . . . . . . . . . . . . . . . . . . . . . 15 7.5. Definition . . . . . . . . . . . . . . . . . . . . . . . . 14
7.6. Discussion . . . . . . . . . . . . . . . . . . . . . . . . 16 7.6. Discussion . . . . . . . . . . . . . . . . . . . . . . . . 15
7.7. Methodologies . . . . . . . . . . . . . . . . . . . . . . 16 7.7. Methodologies . . . . . . . . . . . . . . . . . . . . . . 15
8. A singleton Definition for PSFD . . . . . . . . . . . . . . . 18 8. A singleton Definition for PSFD . . . . . . . . . . . . . . . 17
8.1. Motivation . . . . . . . . . . . . . . . . . . . . . . . . 18 8.1. Motivation . . . . . . . . . . . . . . . . . . . . . . . . 17
8.2. Metric Name . . . . . . . . . . . . . . . . . . . . . . . 18 8.2. Metric Name . . . . . . . . . . . . . . . . . . . . . . . 17
8.3. Metric Parameters . . . . . . . . . . . . . . . . . . . . 18 8.3. Metric Parameters . . . . . . . . . . . . . . . . . . . . 17
8.4. Metric Units . . . . . . . . . . . . . . . . . . . . . . . 18 8.4. Metric Units . . . . . . . . . . . . . . . . . . . . . . . 17
8.5. Definition . . . . . . . . . . . . . . . . . . . . . . . . 18 8.5. Definition . . . . . . . . . . . . . . . . . . . . . . . . 17
8.6. Discussion . . . . . . . . . . . . . . . . . . . . . . . . 19 8.6. Discussion . . . . . . . . . . . . . . . . . . . . . . . . 18
8.7. Methodologies . . . . . . . . . . . . . . . . . . . . . . 19 8.7. Methodologies . . . . . . . . . . . . . . . . . . . . . . 18
9. A singleton Definition for PSRD . . . . . . . . . . . . . . . 21 9. A singleton Definition for PSRD . . . . . . . . . . . . . . . 20
9.1. Motivation . . . . . . . . . . . . . . . . . . . . . . . . 21 9.1. Motivation . . . . . . . . . . . . . . . . . . . . . . . . 20
9.2. Metric Name . . . . . . . . . . . . . . . . . . . . . . . 21 9.2. Metric Name . . . . . . . . . . . . . . . . . . . . . . . 20
9.3. Metric Parameters . . . . . . . . . . . . . . . . . . . . 21 9.3. Metric Parameters . . . . . . . . . . . . . . . . . . . . 20
9.4. Metric Units . . . . . . . . . . . . . . . . . . . . . . . 21 9.4. Metric Units . . . . . . . . . . . . . . . . . . . . . . . 20
9.5. Definition . . . . . . . . . . . . . . . . . . . . . . . . 21 9.5. Definition . . . . . . . . . . . . . . . . . . . . . . . . 20
9.6. Discussion . . . . . . . . . . . . . . . . . . . . . . . . 22 9.6. Discussion . . . . . . . . . . . . . . . . . . . . . . . . 21
9.7. Methodologies . . . . . . . . . . . . . . . . . . . . . . 22 9.7. Methodologies . . . . . . . . . . . . . . . . . . . . . . 21
10. A Definition for Samples of Data Path Delay . . . . . . . . . 24 10. A Definition for Samples of Data Path Delay . . . . . . . . . 23
10.1. Metric Name . . . . . . . . . . . . . . . . . . . . . . . 24 10.1. Metric Name . . . . . . . . . . . . . . . . . . . . . . . 23
10.2. Metric Parameters . . . . . . . . . . . . . . . . . . . . 24 10.2. Metric Parameters . . . . . . . . . . . . . . . . . . . . 23
10.3. Metric Units . . . . . . . . . . . . . . . . . . . . . . . 24 10.3. Metric Units . . . . . . . . . . . . . . . . . . . . . . . 23
10.4. Definition . . . . . . . . . . . . . . . . . . . . . . . . 24 10.4. Definition . . . . . . . . . . . . . . . . . . . . . . . . 23
10.5. Discussion . . . . . . . . . . . . . . . . . . . . . . . . 25 10.5. Discussion . . . . . . . . . . . . . . . . . . . . . . . . 24
10.6. Methodologies . . . . . . . . . . . . . . . . . . . . . . 25 10.6. Methodologies . . . . . . . . . . . . . . . . . . . . . . 24
10.7. Typical testing cases . . . . . . . . . . . . . . . . . . 25 10.7. Typical testing cases . . . . . . . . . . . . . . . . . . 24
10.7.1. With No LSP in the Network . . . . . . . . . . . . . 25 10.7.1. With No LSP in the Network . . . . . . . . . . . . . 24
10.7.2. With a Number of LSPs in the Network . . . . . . . . 25 10.7.2. With a Number of LSPs in the Network . . . . . . . . 24
11. Some Statistics Definitions for Metrics to Report . . . . . . 27 11. Some Statistics Definitions for Metrics to Report . . . . . . 26
11.1. The Minimum of Metric . . . . . . . . . . . . . . . . . . 27 11.1. The Minimum of Metric . . . . . . . . . . . . . . . . . . 26
11.2. The Median of Metric . . . . . . . . . . . . . . . . . . . 27 11.2. The Median of Metric . . . . . . . . . . . . . . . . . . . 26
11.3. The percentile of Metric . . . . . . . . . . . . . . . . . 27 11.3. The percentile of Metric . . . . . . . . . . . . . . . . . 26
11.4. The Failure Probability . . . . . . . . . . . . . . . . . 27 11.4. The Failure Probability . . . . . . . . . . . . . . . . . 26
11.4.1. Failure Count . . . . . . . . . . . . . . . . . . . . 28 11.4.1. Failure Count . . . . . . . . . . . . . . . . . . . . 27
11.4.2. Failure Ratio . . . . . . . . . . . . . . . . . . . . 28 11.4.2. Failure Ratio . . . . . . . . . . . . . . . . . . . . 27
12. Security Considerations . . . . . . . . . . . . . . . . . . . 29 12. Security Considerations . . . . . . . . . . . . . . . . . . . 28
13. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 30 13. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 29
14. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 31 14. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 30
15. References . . . . . . . . . . . . . . . . . . . . . . . . . . 32 15. References . . . . . . . . . . . . . . . . . . . . . . . . . . 31
15.1. Normative References . . . . . . . . . . . . . . . . . . . 32 15.1. Normative References . . . . . . . . . . . . . . . . . . . 31
15.2. Informative References . . . . . . . . . . . . . . . . . . 32 15.2. Informative References . . . . . . . . . . . . . . . . . . 31
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 33 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 32
1. Introduction 1. Introduction
Ideally, the completion of the signaling process means that the Ideally, the completion of the signaling process means that the
signaled label switched path (LSP) is ready to carry traffic. signaled label switched path (LSP) is ready to carry traffic.
However, in actual implementations, vendors may choose to program the However, in actual implementations, vendors may choose to program the
cross connection in a pipelined manner, so that the overall LSP cross connection in a pipelined manner, so that the overall LSP
provisioning delay can be reduced. In such situations, the data path provisioning delay can be reduced. In such situations, the data path
may not be ready for use instantly after the signaling process may not be ready for use instantly after the signaling process
completes. Implementation deficiency may also cause the completes. Implementation deficiency may also cause the
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Authors' Addresses Authors' Addresses
Weiqiang Sun, Editor Weiqiang Sun, Editor
Shanghai Jiao Tong University Shanghai Jiao Tong University
800 Dongchuan Road 800 Dongchuan Road
Shanghai 200240 Shanghai 200240
China China
Phone: +86 21 3420 5359 Phone: +86 21 3420 5359
Email: sunwq@mit.edu Email: sun.weiqiang@gmail.com
Guoying Zhang, Editor Guoying Zhang, Editor
China Academy of Telecommunication Research, MIIT, China. China Academy of Telecommunication Research, MIIT, China.
No.52 Hua Yuan Bei Lu,Haidian District No.52 Hua Yuan Bei Lu,Haidian District
Beijing 100083 Beijing 100083
China China
Phone: +86 1062300103 Phone: +86 1062300103
EMail: zhangguoying@mail.ritt.com.cn EMail: zhangguoying@mail.ritt.com.cn
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