draft-ietf-pce-stateful-pce-app-04.txt   draft-ietf-pce-stateful-pce-app-05.txt 
PCE Working Group X. Zhang, Ed. PCE Working Group X. Zhang, Ed.
Internet-Draft Huawei Technologies Internet-Draft Huawei Technologies
Intended status: Informational I. Minei, Ed. Intended status: Informational I. Minei, Ed.
Expires: October 31, 2015 Google, Inc. Expires: April 21, 2016 Google, Inc.
April 29, 2015 October 19, 2015
Applicability of a Stateful Path Computation Element (PCE) Applicability of a Stateful Path Computation Element (PCE)
draft-ietf-pce-stateful-pce-app-04 draft-ietf-pce-stateful-pce-app-05
Abstract Abstract
A stateful Path Computation Element (PCE) maintains information about A stateful Path Computation Element (PCE) maintains information about
Label Switched Path (LSP) characteristics and resource usage within a Label Switched Path (LSP) characteristics and resource usage within a
network in order to provide traffic engineering calculations for its network in order to provide traffic engineering calculations for its
associated Path Computation Clients (PCCs). This document describes associated Path Computation Clients (PCCs). This document describes
general considerations for a stateful PCE deployment and examines its general considerations for a stateful PCE deployment and examines its
applicability and benefits, as well as its challenges and limitations applicability and benefits, as well as its challenges and limitations
through a number of use cases. PCE Communication Protocol (PCEP) through a number of use cases. PCE Communication Protocol (PCEP)
skipping to change at page 1, line 39 skipping to change at page 1, line 39
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
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Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on October 31, 2015. This Internet-Draft will expire on April 21, 2016.
Copyright Notice Copyright Notice
Copyright (c) 2015 IETF Trust and the persons identified as the Copyright (c) 2015 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
skipping to change at page 22, line 33 skipping to change at page 22, line 33
Farrel, A. and D. King, "Unanswered Questions in the Path Farrel, A. and D. King, "Unanswered Questions in the Path
Computation Element Architecture", draft-ietf-pce- Computation Element Architecture", draft-ietf-pce-
questions-08 (work in progress), October 2014. questions-08 (work in progress), October 2014.
[I-D.ietf-pce-stateful-pce] [I-D.ietf-pce-stateful-pce]
Crabbe, E., Minei, I., Medved, J., and R. Varga, "PCEP Crabbe, E., Minei, I., Medved, J., and R. Varga, "PCEP
Extensions for Stateful PCE", draft-ietf-pce-stateful- Extensions for Stateful PCE", draft-ietf-pce-stateful-
pce-11 (work in progress), April 2015. pce-11 (work in progress), April 2015.
[RFC4655] Farrel, A., Vasseur, J., and J. Ash, "A Path Computation [RFC4655] Farrel, A., Vasseur, J., and J. Ash, "A Path Computation
Element (PCE)-Based Architecture", RFC 4655, August 2006. Element (PCE)-Based Architecture", RFC 4655,
DOI 10.17487/RFC4655, August 2006,
<http://www.rfc-editor.org/info/rfc4655>.
[RFC5440] Vasseur, JP. and JL. Le Roux, "Path Computation Element [RFC5440] Vasseur, JP., Ed. and JL. Le Roux, Ed., "Path Computation
(PCE) Communication Protocol (PCEP)", RFC 5440, March Element (PCE) Communication Protocol (PCEP)", RFC 5440,
2009. DOI 10.17487/RFC5440, March 2009,
<http://www.rfc-editor.org/info/rfc5440>.
10.2. Informative References 10.2. Informative References
[I-D.ietf-ccamp-flexi-grid-fwk] [I-D.ietf-ccamp-flexi-grid-fwk]
Dios, O., Casellas, R., Zhang, F., Fu, X., Ceccarelli, D., Dios, O. and R. Casellas, "Framework and Requirements for
and I. Hussain, "Framework and Requirements for GMPLS- GMPLS-based control of Flexi-grid DWDM networks", draft-
based control of Flexi-grid DWDM networks", draft-ietf- ietf-ccamp-flexi-grid-fwk-07 (work in progress), August
ccamp-flexi-grid-fwk-03 (work in progress), February 2015. 2015.
[I-D.ietf-ccamp-gmpls-general-constraints-ospf-te] [I-D.ietf-ccamp-gmpls-general-constraints-ospf-te]
Zhang, F., Lee, Y., Han, J., Bernstein, G., and Y. Xu, Zhang, F., Lee, Y., Han, J., Bernstein, G., and Y. Xu,
"OSPF-TE Extensions for General Network Element "OSPF-TE Extensions for General Network Element
Constraints", draft-ietf-ccamp-gmpls-general-constraints- Constraints", draft-ietf-ccamp-gmpls-general-constraints-
ospf-te-10 (work in progress), March 2015. ospf-te-10 (work in progress), March 2015.
[I-D.ietf-ccamp-wson-signal-compatibility-ospf] [I-D.ietf-ccamp-wson-signal-compatibility-ospf]
Lee, Y. and G. Bernstein, "GMPLS OSPF Enhancement for Lee, Y. and G. Bernstein, "GMPLS OSPF Enhancement for
Signal and Network Element Compatibility for Wavelength Signal and Network Element Compatibility for Wavelength
Switched Optical Networks", draft-ietf-ccamp-wson-signal- Switched Optical Networks", draft-ietf-ccamp-wson-signal-
compatibility-ospf-15 (work in progress), May 2014. compatibility-ospf-17 (work in progress), August 2015.
[I-D.ietf-pce-gmpls-pcep-extensions] [I-D.ietf-pce-gmpls-pcep-extensions]
Margaria, C., Dios, O., and F. Zhang, "PCEP extensions for Margaria, C., Dios, O., and F. Zhang, "PCEP extensions for
GMPLS", draft-ietf-pce-gmpls-pcep-extensions-10 (work in GMPLS", draft-ietf-pce-gmpls-pcep-extensions-11 (work in
progress), October 2014. progress), October 2015.
[I-D.ietf-pce-stateful-sync-optimizations] [I-D.ietf-pce-stateful-sync-optimizations]
Crabbe, E., Minei, I., Medved, J., Varga, R., Zhang, X., Crabbe, E., Minei, I., Medved, J., Varga, R., Zhang, X.,
and D. Dhody, "Optimizations of Label Switched Path State and D. Dhody, "Optimizations of Label Switched Path State
Synchronization Procedures for a Stateful PCE", draft- Synchronization Procedures for a Stateful PCE", draft-
ietf-pce-stateful-sync-optimizations-02 (work in ietf-pce-stateful-sync-optimizations-03 (work in
progress), January 2015. progress), October 2015.
[I-D.sivabalan-pce-disco-stateful] [I-D.sivabalan-pce-disco-stateful]
Sivabalan, S., Medved, J., and X. Zhang, "IGP Extensions Sivabalan, S., Medved, J., and X. Zhang, "IGP Extensions
for Stateful PCE Discovery", draft-sivabalan-pce-disco- for Stateful PCE Discovery", draft-sivabalan-pce-disco-
stateful-03 (work in progress), January 2014. stateful-03 (work in progress), January 2014.
[RFC3209] Awduche, D., Berger, L., Gan, D., Li, T., Srinivasan, V., [RFC3209] Awduche, D., Berger, L., Gan, D., Li, T., Srinivasan, V.,
and G. Swallow, "RSVP-TE: Extensions to RSVP for LSP and G. Swallow, "RSVP-TE: Extensions to RSVP for LSP
Tunnels", RFC 3209, December 2001. Tunnels", RFC 3209, DOI 10.17487/RFC3209, December 2001,
<http://www.rfc-editor.org/info/rfc3209>.
[RFC4427] Mannie, E. and D. Papadimitriou, "Recovery (Protection and [RFC4427] Mannie, E., Ed. and D. Papadimitriou, Ed., "Recovery
Restoration) Terminology for Generalized Multi-Protocol (Protection and Restoration) Terminology for Generalized
Label Switching (GMPLS)", RFC 4427, March 2006. Multi-Protocol Label Switching (GMPLS)", RFC 4427,
DOI 10.17487/RFC4427, March 2006,
<http://www.rfc-editor.org/info/rfc4427>.
[RFC4657] Ash, J. and J. Le Roux, "Path Computation Element (PCE) [RFC4657] Ash, J., Ed. and J. Le Roux, Ed., "Path Computation
Communication Protocol Generic Requirements", RFC 4657, Element (PCE) Communication Protocol Generic
September 2006. Requirements", RFC 4657, DOI 10.17487/RFC4657, September
2006, <http://www.rfc-editor.org/info/rfc4657>.
[RFC5212] Shiomoto, K., Papadimitriou, D., Le Roux, JL., Vigoureux, [RFC5212] Shiomoto, K., Papadimitriou, D., Le Roux, JL., Vigoureux,
M., and D. Brungard, "Requirements for GMPLS-Based Multi- M., and D. Brungard, "Requirements for GMPLS-Based Multi-
Region and Multi-Layer Networks (MRN/MLN)", RFC 5212, July Region and Multi-Layer Networks (MRN/MLN)", RFC 5212,
2008. DOI 10.17487/RFC5212, July 2008,
<http://www.rfc-editor.org/info/rfc5212>.
[RFC5521] Oki, E., Takeda, T., and A. Farrel, "Extensions to the [RFC5521] Oki, E., Takeda, T., and A. Farrel, "Extensions to the
Path Computation Element Communication Protocol (PCEP) for Path Computation Element Communication Protocol (PCEP) for
Route Exclusions", RFC 5521, April 2009. Route Exclusions", RFC 5521, DOI 10.17487/RFC5521, April
2009, <http://www.rfc-editor.org/info/rfc5521>.
[RFC5557] Lee, Y., Le Roux, JL., King, D., and E. Oki, "Path [RFC5557] Lee, Y., Le Roux, JL., King, D., and E. Oki, "Path
Computation Element Communication Protocol (PCEP) Computation Element Communication Protocol (PCEP)
Requirements and Protocol Extensions in Support of Global Requirements and Protocol Extensions in Support of Global
Concurrent Optimization", RFC 5557, July 2009. Concurrent Optimization", RFC 5557, DOI 10.17487/RFC5557,
July 2009, <http://www.rfc-editor.org/info/rfc5557>.
[RFC5623] Oki, E., Takeda, T., Le Roux, JL., and A. Farrel, [RFC5623] Oki, E., Takeda, T., Le Roux, JL., and A. Farrel,
"Framework for PCE-Based Inter-Layer MPLS and GMPLS "Framework for PCE-Based Inter-Layer MPLS and GMPLS
Traffic Engineering", RFC 5623, September 2009. Traffic Engineering", RFC 5623, DOI 10.17487/RFC5623,
September 2009, <http://www.rfc-editor.org/info/rfc5623>.
[RFC5671] Yasukawa, S. and A. Farrel, "Applicability of the Path [RFC5671] Yasukawa, S. and A. Farrel, Ed., "Applicability of the
Computation Element (PCE) to Point-to-Multipoint (P2MP) Path Computation Element (PCE) to Point-to-Multipoint
MPLS and GMPLS Traffic Engineering (TE)", RFC 5671, (P2MP) MPLS and GMPLS Traffic Engineering (TE)", RFC 5671,
October 2009. DOI 10.17487/RFC5671, October 2009,
<http://www.rfc-editor.org/info/rfc5671>.
[RFC6163] Lee, Y., Bernstein, G., and W. Imajuku, "Framework for [RFC6163] Lee, Y., Ed., Bernstein, G., Ed., and W. Imajuku,
GMPLS and Path Computation Element (PCE) Control of "Framework for GMPLS and Path Computation Element (PCE)
Wavelength Switched Optical Networks (WSONs)", RFC 6163, Control of Wavelength Switched Optical Networks (WSONs)",
April 2011. RFC 6163, DOI 10.17487/RFC6163, April 2011,
<http://www.rfc-editor.org/info/rfc6163>.
Authors' Addresses Authors' Addresses
Xian Zhang (editor) Xian Zhang (editor)
Huawei Technologies Huawei Technologies
F3-5-B R&D Center, Huawei Industrial Base, Bantian, Longgang District F3-5-B R&D Center, Huawei Industrial Base, Bantian, Longgang District
Shenzhen, Guangdong 518129 Shenzhen, Guangdong 518129
P.R.China P.R.China
Email: zhang.xian@huawei.com Email: zhang.xian@huawei.com
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