A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Path Computation Element WG of the IETF.

        Title           : Path Computation Element (PCE) Protocol Extensions 
for Stateful PCE Usage in GMPLS-controlled Networks
        Authors         : Xian Zhang
                          Young Lee
                          Fatai Zhang
                          Ramon Casellas
                          Oscar Gonzalez de Dios
                          Zafar Ali
        Filename        : draft-ietf-pce-pcep-stateful-pce-gmpls-07.txt
        Pages           : 13
        Date            : 2018-02-13

   The Path Computation Element (PCE) facilitates Traffic Engineering
   (TE) based path calculation in large, multi-domain, multi-region, or
   multi-layer networks. The PCE communication Protocol (PCEP) has been
   extended to support stateful PCE functions where the PCE retains
   information about the paths already present in the network, but
   those extensions are technology-agnostic. This memo provides
   extensions required for PCEP so as to enable the usage of a stateful
   PCE capability in GMPLS-controlled networks.

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