protocol extension requirement for cooperation between pce and distributed routing controller in...
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![Page 1: Protocol Extension Requirement for Cooperation between PCE and Distributed Routing Controller in GMPLS Networks draft-zhaoyl-pce-dre-01.txt Yongli Zhao,](https://reader036.vdocuments.net/reader036/viewer/2022082917/5514e30b550346a80c8b4714/html5/thumbnails/1.jpg)
Protocol Extension Requirement for Cooperation between PCE and Distributed Routing Controller in GMPLS Networks
draft-zhaoyl-pce-dre-01.txt
Yongli Zhao, BUPTJie Zhang, BUPT
Ruiquan Jing, CTBRIDajiang Wang, ZTE
Xihua Fu, ZTE
79th IETF Beijing
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Motivation
79th IETF Beijing
• PCE is suitable for the path computation in multi-layer and multi-domain networks, especially in multi-constraints environment. While distributed routing controller is good at the path computation in parallel and distributed network control in the local domain. A cooperative path computation architecture named Dual Routing Engine (DRE) is proposed, which is based on the two path computation engines and can combine the advantages of centralized and distributed.
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General Assumptions• Each GMPLS-based control node is equipped with a distributed
routing controller which can complete the path computation in the local domain
• The topology and TE information are updated as soon as any change occurs in the network
• PCE and distributed routing controller can be selected arbitrary according to the local routing strategy.
• Constraints and strategies can be considered by PCE during the process of path computation including the intra-domain path and inter-domain path.
• An end-to-end path which crosses domains or crosses layers can be completed by several PCEs or several DRCs or several PCEs and DRCs.
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Cooperative Architecture based on PCE and Distributed Routing
Controller
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Different Application ScenariosCross layers and cross domains Independent coexistenceSecurity backupPolicy-enabledConstraint-basedService-orientedCooperation between network level and node level
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PCEP Extension Requirements
PCEP extension requirement for the communication between RES and PCE
PCEP extension requirement for the communication between RES and DRC
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Other Protocol Extension Requirements
OSPF-TE extension requirement for the cooperative architecture
RSVP-TE extension requirement for the cooperative architecture
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Next Steps
Improve the document according to the feedback from meeting or mailing list
Comments are always appreciated