Yongli Zhao, BUPT Jie Zhang, BUPT Ruiquan Jing, CTBRI Dajiang Wang, ZTE Xihua Fu, ZTE
-
Upload
hyatt-chambers -
Category
Documents
-
view
48 -
download
2
description
Transcript of Yongli Zhao, BUPT Jie Zhang, BUPT Ruiquan Jing, CTBRI Dajiang Wang, ZTE Xihua Fu, ZTE
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
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.
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.
Cooperative Architecture based on PCE and Distributed Routing
Controller
Different Application ScenariosCross layers and cross domains Independent coexistenceSecurity backupPolicy-enabledConstraint-basedService-orientedCooperation between network level and node level
PCEP Extension Requirements
PCEP extension requirement for the communication between RES and PCE
PCEP extension requirement for the communication between RES and DRC
Other Protocol Extension Requirements
OSPF-TE extension requirement for the cooperative architecture
RSVP-TE extension requirement for the cooperative architecture
Next Steps
Improve the document according to the feedback from meeting or mailing list
Comments are always appreciated