I-D Action: draft-tanaka-pce-stateful-pce-mbb-07.txt
internet-drafts@ietf.org Thu, 20 December 2018 09:52 UTC
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A New Internet-Draft is available from the on-line Internet-Drafts directories. Title : Make-Before-Break (MBB) MPLS-TE LSP restoration and reoptimization procedure using Stateful Path Computation Element (PCE). Authors : Yosuke Tanaka Yuji Kamite Dhruv Dhody Ramanjaneya Reddy Palleti Filename : draft-tanaka-pce-stateful-pce-mbb-07.txt Pages : 18 Date : 2018-12-20 Abstract: Stateful Path Computation Element (PCE) and its corresponding protocol extensions provide a mechanism that enables PCE to do stateful control of Multiprotocol Label Switching (MPLS) Traffic Engineering Label Switched Paths (TE LSP). Stateful PCE supports manipulating of the existing LSP's state and attributes (e.g., bandwidth and path) via delegation and also instantiation of new LSPs in the network via PCE Initiation procedures. In the current MPLS TE network using Resource ReSerVation Protocol (RSVP-TE), LSPs are often controlled by Make-before-break (M-B-B) signaling by the headend for the purpose of LSP restoration and reoptimization. In most cases, it is an essential operation to reroute LSP traffic without any data disruption. This document specifies the procedure of applying stateful PCE's control to make-before-break RSVP-TE signaling. In this document, two types of restoration/reoptimization procedures are defined, implicit mode and explicit mode. This document also specifies the usage and handling of stateful PCEP (PCE Communication Protocol) messages, expected behavior of PCC as RSVP-TE headend and necessary extensions of additional PCEP objects. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-tanaka-pce-stateful-pce-mbb/ There are also htmlized versions available at: https://tools.ietf.org/html/draft-tanaka-pce-stateful-pce-mbb-07 https://datatracker.ietf.org/doc/html/draft-tanaka-pce-stateful-pce-mbb-07 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-tanaka-pce-stateful-pce-mbb-07 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/
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