draft-ietf-pce-stateful-hpce-05.txt   draft-ietf-pce-stateful-hpce-06.txt 
PCE Working Group D. Dhody PCE Working Group D. Dhody
Internet-Draft Y. Lee Internet-Draft Y. Lee
Intended status: Informational Huawei Technologies Intended status: Informational Huawei Technologies
Expires: December 20, 2018 D. Ceccarelli Expires: April 25, 2019 D. Ceccarelli
Ericsson Ericsson
J. Shin J. Shin
SK Telecom SK Telecom
D. King D. King
Lancaster University Lancaster University
O. Gonzalez de Dios O. Gonzalez de Dios
Telefonica I+D Telefonica I+D
June 18, 2018 October 22, 2018
Hierarchical Stateful Path Computation Element (PCE). Hierarchical Stateful Path Computation Element (PCE).
draft-ietf-pce-stateful-hpce-05 draft-ietf-pce-stateful-hpce-06
Abstract Abstract
A Stateful Path Computation Element (PCE) maintains information on A Stateful Path Computation Element (PCE) maintains information on
the current network state, including: computed Label Switched Path the current network state, including: computed Label Switched Path
(LSPs), reserved resources within the network, and pending path (LSPs), reserved resources within the network, and pending path
computation requests. This information may then be considered when computation requests. This information may then be considered when
computing new traffic engineered LSPs, and for associated computing new traffic engineered LSPs, and for associated
and dependent LSPs, received from Path Computation Clients (PCCs). and dependent LSPs, received from Path Computation Clients (PCCs).
skipping to change at page 13, line 19 skipping to change at page 13, line 19
+ L1 + + L2 + + L1 + + L2 +
+---+ +---+ +---+ +---+
Figure 2: Sample Inter-Layer Topology Figure 2: Sample Inter-Layer Topology
All procedures described in Section 3 are applicable to inter-layer All procedures described in Section 3 are applicable to inter-layer
path setup as well. path setup as well.
4.2. Applicability to ACTN 4.2. Applicability to ACTN
[I-D.ietf-teas-actn-framework] describes framework for Abstraction [RFC8453] describes framework for Abstraction and Control of TE
and Control of TE Networks (ACTN), where each Provisioning Network Networks (ACTN), where each Provisioning Network Controller (PNC) is
Controller (PNC) is equivalent to C-PCE and P-PCE is the Multi-Domain equivalent to C-PCE and P-PCE is the Multi-Domain Service Coordinator
Service Coordinator (MDSC). The Per domain stitched LSP as per the (MDSC). The Per domain stitched LSP as per the Hierarchical PCE
Hierarchical PCE architecture described in Section 3.3.1 and Section architecture described in Section 3.3.1 and Section 4.1 is well
4.1 is well suited for ACTN. suited for ACTN.
[I-D.ietf-pce-applicability-actn] examines the applicability of PCE [I-D.ietf-pce-applicability-actn] examines the applicability of PCE
to the ACTN framework. To support the function of multi domain to the ACTN framework. To support the function of multi domain
coordination via hierarchy, the stateful hierarchy of PCEs plays a coordination via hierarchy, the stateful hierarchy of PCEs plays a
crucial role. crucial role.
In ACTN framework, Customer Network Controller (CNC) can request the In ACTN framework, Customer Network Controller (CNC) can request the
MDSC to check if there is a possibility to meet Virtual Network (VN) MDSC to check if there is a possibility to meet Virtual Network (VN)
requirements (before requesting for VN provision). The H-PCE requirements (before requesting for VN provision). The H-PCE
architecture as described in [RFC6805] can supports via the use of architecture as described in [RFC6805] can supports via the use of
skipping to change at page 17, line 27 skipping to change at page 17, line 27
Synchronization Procedures for a Stateful PCE", RFC 8232, Synchronization Procedures for a Stateful PCE", RFC 8232,
DOI 10.17487/RFC8232, September 2017, DOI 10.17487/RFC8232, September 2017,
<https://www.rfc-editor.org/info/rfc8232>. <https://www.rfc-editor.org/info/rfc8232>.
[RFC8253] Lopez, D., Gonzalez de Dios, O., Wu, Q., and D. Dhody, [RFC8253] Lopez, D., Gonzalez de Dios, O., Wu, Q., and D. Dhody,
"PCEPS: Usage of TLS to Provide a Secure Transport for the "PCEPS: Usage of TLS to Provide a Secure Transport for the
Path Computation Element Communication Protocol (PCEP)", Path Computation Element Communication Protocol (PCEP)",
RFC 8253, DOI 10.17487/RFC8253, October 2017, RFC 8253, DOI 10.17487/RFC8253, October 2017,
<https://www.rfc-editor.org/info/rfc8253>. <https://www.rfc-editor.org/info/rfc8253>.
[I-D.ietf-teas-actn-framework] [RFC8453] Ceccarelli, D., Ed. and Y. Lee, Ed., "Framework for
Ceccarelli D. and Y. Lee, "Framework for Abstraction and Abstraction and Control of TE Networks (ACTN)", RFC 8453,
Control of Transport Networks", draft-ietf-teas- DOI 10.17487/RFC8453, August 2018,
actn-framework-15 (work in progress), May 2018. <https://www.rfc-editor.org/info/rfc8453>.
[I-D.ietf-pce-applicability-actn] [I-D.ietf-pce-applicability-actn]
Dhody, D., Lee, Y., and D. Ceccarelli, "Applicability of Dhody, D., Lee, Y., and D. Ceccarelli, "Applicability of
Path Computation Element (PCE) for Abstraction and Path Computation Element (PCE) for Abstraction and
Control of TE Networks (ACTN)", draft-ietf-pce- Control of TE Networks (ACTN)", draft-ietf-pce-
applicability-actn-06 (work in progress), June 2018. applicability-actn-06 (work in progress), June 2018.
[I-D.litkowski-pce-state-sync] [I-D.litkowski-pce-state-sync]
Litkowski, S., Sivabalan, S., and D. Dhody, "Inter Litkowski, S., Sivabalan, S., and D. Dhody, "Inter
Stateful Path Computation Element communication Stateful Path Computation Element communication
skipping to change at page 18, line 7 skipping to change at page 18, line 7
Zhang, F., Zhao, Q., Dios, O., Casellas, R., and D. King, Zhang, F., Zhao, Q., Dios, O., Casellas, R., and D. King,
"Extensions to Path Computation Element Communication "Extensions to Path Computation Element Communication
Protocol (PCEP) for Hierarchical Path Computation Elements Protocol (PCEP) for Hierarchical Path Computation Elements
(PCE)", draft-ietf-pce-hierarchy-extensions-05 (work in (PCE)", draft-ietf-pce-hierarchy-extensions-05 (work in
progress), June 2018. progress), June 2018.
[I-D.ietf-pce-pcep-yang] [I-D.ietf-pce-pcep-yang]
Dhody, D., Hardwick, J., Beeram, V., and j. Dhody, D., Hardwick, J., Beeram, V., and j.
jefftant@gmail.com, "A YANG Data Model for Path jefftant@gmail.com, "A YANG Data Model for Path
Computation Element Communications Protocol (PCEP)", Computation Element Communications Protocol (PCEP)",
draft-ietf-pce-pcep-yang-08 (work in progress), draft-ietf-pce-pcep-yang-09 (work in progress),
June 2018. October 2018.
[I-D.dugeon-pce-stateful-interdomain] [I-D.dugeon-pce-stateful-interdomain]
Dugeon, O. and J. Meuric, "PCEP Extension for Stateful Dugeon, O., Meuric, J., Lee, Y., Dhody, D., and D.
Inter-Domain Tunnels", draft-dugeon-pce-stateful- Ceccarelli, "PCEP Extension for Stateful Inter-Domain
interdomain-00 (work in progress), October 2017. Tunnels", draft-dugeon-pce-stateful-interdomain-01 (work
in progress), July 2018.
Appendix A. Contributor Addresses Appendix A. Contributor Addresses
Avantika Avantika
Huawei Technologies Huawei Technologies
Divyashree Techno Park, Whitefield Divyashree Techno Park, Whitefield
Bangalore, Karnataka 560066 Bangalore, Karnataka 560066
India India
EMail: s.avantika.avantika@gmail.com EMail: s.avantika.avantika@gmail.com
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