Extensions to the Path Computation Element Communication Protocol(PCEP) for Crank-back Routing

Document Type Expired Internet-Draft (individual)
Authors Dajiang Wang  , Xihua Fu  , Wanyi Gu  , Shanguo Huang 
Last updated 2010-10-18
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Path computation in large multi-layer and multi-region networks is complex and may require special computational components and cooperation between different network domains, whereby a failure affect to establish a path or a failure of an existing path may be corrected by a new path computation and fresh signaling. This document specifies the crank-back routing mechanism based on re- routing in crank back Path Computation Element (PCE). When a Path Computation Client (PCC) requests a PCE for a route, it may be useful for the PCC to specify Crank-back routing to the path computation, abstract nodes, resources, and domains that are to be explicitly excluded from the computed route. Such mechanism is termed Crank- back routing. The PCE Communication Protocol (PCEP) is designed as a communication protocol between PCCs and PCEs. To support this mechanism, function of PCE and procedure of PCEP signaling performance are extended.


Dajiang Wang (wang.dajiang@zte.com.cn)
Xihua Fu (fu.xihua@zte.com.cn)
Wanyi Gu (wyg@bupt.edu.cn)
Shanguo Huang (shghuang@bupt.edu.cn)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)