Pseudowire Setup and Maintenance using the Label Distribution Protocol
draft-ietf-pals-rfc4447bis-05

Document Type Active Internet-Draft (pals WG)
Last updated 2017-01-19 (latest revision 2016-07-05)
Replaces draft-ietf-pwe3-rfc4447bis
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Document shepherd Stewart Bryant
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Send notices to draft-ietf-pals-rfc4447bis.all@ietf.org, "Stewart Bryant" <stewart.bryant@gmail.com>
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Internet Engineering Task Force                         Luca Martini Ed.
Internet Draft                                           Giles Heron Ed.
Intended status: Internet Standard
Expires: January 5, 2017                                           Cisco
Obsoletes: 6723, 4447

                                                            July 5, 2016

 Pseudowire Setup and Maintenance using the Label Distribution Protocol

                   draft-ietf-pals-rfc4447bis-05.txt

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
   provisions of BCP 78 and BCP 79.

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Abstract

   Layer 2 services (such as Frame Relay, Asynchronous Transfer Mode,
   and Ethernet) can be "emulated" over an MPLS backbone by
   encapsulating the Layer 2 Protocol Data Units (PDU) and then
   transmitting them over "pseudowires". It is also possible to use
   pseudowires to provide low-rate Time Division Multiplexed and

Martini & Heron                                                 [Page 1]
Internet Draft     draft-ietf-pals-rfc4447bis-05.txt        July 5, 2016

   Synchronous Optical NETworking circuit emulation over an MPLS-enabled
   network. This document specifies a protocol for establishing and
   maintaining the pseudowires, using extensions to the Label
   Distribution Protocol (LDP).  Procedures for encapsulating Layer 2
   PDUs are specified in a set of companion documents.

   This document has been written to address errata in a previous
   version of this standard.

Martini & Heron                                                 [Page 2]
Internet Draft     draft-ietf-pals-rfc4447bis-05.txt        July 5, 2016

Table of Contents

    1        Introduction  .........................................   4
    2        Changes from RFC4447  .................................   6
    3        Specification of Requirements  ........................   7
    4        The Pseudowire Label  .................................   7
    5        Details Specific to Particular Emulated Services  .....   9
    5.1      IP Layer 2 Transport  .................................   9
    6        LDP  ..................................................   9
    6.1      The PWid FEC Element  .................................  10
    6.2      The Generalized PWid FEC Element  .....................  11
    6.2.1    Attachment Identifiers  ...............................  12
    6.2.2    Encoding the Generalized PWid FEC Element  ............  13
    6.2.2.1  Interface Parameters TLV  .............................  15
    6.2.2.2  PW Group ID TLV  ......................................  15
    6.2.3    Signaling Procedures  .................................  16
    6.3      Signaling of Pseudowire Status  .......................  17
    6.3.1    Use of Label Mapping Messages  ........................  17
    6.3.2    Signaling PW Status  ..................................  17
    6.3.3    Pseudowire Status Negotiation Procedures  .............  19
    6.4      Interface Parameters Sub-TLV  .........................  21
    6.5      LDP label Withdrawal procedures  ......................  22
    7        Control Word  .........................................  22
    7.1      PW Types for which the Control Word is REQUIRED  ......  22
    7.2      PW Types for which the Control Word is NOT mandatory  .  22
    7.3      Control-Word Renegotiation by Label Request Message  ..  24
    7.4      Sequencing Considerations  ............................  25
    7.4.1    Label Advertisements  .................................  25
    7.4.2    Label Release  ........................................  25
    8        IANA Considerations  ..................................  26
    9        Security Considerations  ..............................  26
    9.1      Data-Plane Security  ..................................  26
    9.2      Control-Plane Security  ...............................  27
   10        Interoperability and Deployment  ......................  28
   11        Acknowledgments  ......................................  29
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