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Versions: 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 RFC 4446

Network Working Group                                       Luca Martini
Internet Draft                                          W. Mark Townsley
Expiration Date: October 2004                         Cisco Systems Inc.








                                                              April 2004



     IANA Allocations for pseudo Wire Edge to Edge Emulation (PWE3)



                 draft-ietf-pwe3-iana-allocation-04.txt


Status of this Memo


   This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026.


   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups. Note that other
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   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
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   material or to cite them other than as "work in progress."


   The list of current Internet-Drafts can be accessed at
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   The list of Internet-Draft Shadow Directories can be accessed at
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Abstract


   The Control and maintenance protocol for providing various Layer 1
   and Layer 2 services over a Packet Switched Network has been
   described in [1]. This document pre-allocates the fixed Pseudo-wire
   identifier , and other fixed protocol values that are to be assigned
   by IANA using the "IETF Consensus" policy defined in RFC2434







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Table of Contents


    1      Specification of Requirements  ..........................   2
    2      PW type  ................................................   2
    3      Interface Parameters field  .............................   3
    4      LDP Status codes  .......................................   4
    5      Pseudo Wire Status  .....................................   4
    6      Security Considerations  ................................   5
    7      Intellectual Property Disclaimer  .......................   5
    8      References  .............................................   5
    9      Author Information  .....................................   5






1. Specification of Requirements


   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119



2. PW type


   As specified in [1], a Virtual Circuit FEC element contains the PW
   Type field. PW Type value 0 is reserved. PW Type values 1 through 24
   are defined in this document. PW Type values 25 through 63 are to be
   assigned by IANA using the "IETF Consensus" policy defined in
   RFC2434. PW Type values 64 through 127 are to be assigned by IANA,
   using the "First Come First Served" policy defined in RFC2434. VC
   Type values 128 through 32767 are vendor-specific, and values in this
   range are not to be assigned by IANA.


   The PW Type is 15 bit quantity containing a value which represents
   the type of PW. Assigned Values are:


      PW type  Description


      0x0001   Frame Relay DLCI
      0x0002   ATM AAL5 SDU VCC transport
      0x0003   ATM transparent cell transport
      0x0004   Ethernet Tagged Mode
      0x0005   Ethernet
      0x0006   HDLC
      0x0007   PPP




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      0x0008   SONET/SDH Circuit Emulation Service Over MPLS (CEM) [Note1]
      0x0009   ATM n-to-one VCC cell transport
      0x000A   ATM n-to-one VPC cell transport
      0x000B   IP Layer2 Transport
      0x000C   ATM one-to-one VCC Cell Mode
      0x000D   ATM one-to-one VPC Cell Mode
      0x000E   ATM AAL5 PDU VCC transport
      0x000F   Frame-Relay Port mode
      0x0010   SONET/SDH Circuit Emulation over Packet (CEP)
      0x0011   Structure-agnostic E1 over Packet (SAToP)
      0x0012   Structure-agnostic T1 (DS1) over Packet (SAToP)
      0x0013   Structure-agnostic E3 over Packet (SAToP)
      0x0014   Structure-agnostic T3 (DS3) over Packet (SAToP)
      0x0015   CESoPSN basic mode
      0x0016   TDMoIP basic mode
      0x0017   CESoPSN TDM with CAS
      0x0018   TDMoIP TDM with CAS


   Note 1: This PW type is grandfathered for a historical protocol.  The
   recommended standards-track protocol to use is CEP (PW type 0x0010).



3. Interface Parameters field


   As specified in [1], a PW FEC element contains the Interface
   Parameters field, which is a list of one or more parameters, and each
   parameter is identified by the Parameter ID field. Parameter ID value
   0 is reserved.  Parameter ID values 1 through 11 are defined in this
   document. Parameter ID values 12 through 63 are to be assigned by
   IANA using the "IETF Consensus" policy defined in RFC2434. Parameter
   ID values 64 through 127 are to be assigned by IANA, using the "First
   Come First Served" policy defined in RFC2434. Parameter ID values 128
   through 255 are vendor- specific, and values in this range are not to
   be assigned by IANA.


   The interface parameter ID is assigned as follows:
   Parameter ID  Length    Description


      0x01         4       Interface MTU in octets
      0x02         4       Maximum Number of concatenated ATM cells
      0x03      up to 82   Optional Interface Description string
      0x04         4       CEP/TDM [2] Payload Bytes
      0x05         4       CEP options
      0x06         4       Requested VLAN ID
      0x07         6       CEP/TDM bit-rate
      0x08         4       Frame-Relay DLCI Length
      0x09         4       Fragmentation indicator
      0x0A         4       FCS retension indicator




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      0x0B       4/8/12    TDM options
      0x0C                                                                 4VCCV parameter


   Note that the Length field is defined as the length of the interface
   parameter including the parameter id and length field itself.


4. LDP Status codes


   RFC 3036 has a range of LDP Status Code values which are assigned by
   IANA through an IETF Consensus action. These are in the range
   0x00000000-0x1fffffff. To meet the protocol requirements of [1], the
   following new status codes are defined:


      0x00000024 "Illegal C-Bit"
      0x00000025 "Wrong C-Bit"
      0x00000026 "Incompatible bit-rate"
      0x00000027 "CEP/TDM mis-configuration"
      0x00000028 "PW status"



   RFC 3036 has a range of LTLV type name space values which are assigned by IANA
   through an IETF Consensus action. the following new code is defined :
      TLV type  Description
       0x096A   PW Status TLV



5. Pseudo Wire Status"


   As specified in [1], a new PW status TLV contains a 32 bit field, PW
   status value 0 is reserved to clear all failures. PW Status Bits 0
   through 4 are defined in this document. PW Status Bits 6 through 15
   are to be assigned by IANA using the "IETF Consensus" policy defined
   in RFC2434. PW Status Bits 16 through 23 are to be assigned by IANA,
   using the "First Come First Served" policy defined in RFC2434. PW
   Status Bits 24 through 31 are vendor-specific, and values in this
   range are not to be assigned by IANA.


   PW status is a 4 octet bit field as follows:


      0x00000000 - Pseudo Wire forwarding ( clear all failures )
      0x00000001 - Pseudo Wire Not Forwarding
      0x00000002 - Local Attachement Circuit ( ingress ) Receive Fault
      0x00000004 - Local Attachement Circuit ( egress ) Transmit Fault
      0x00000008 - Local PSN-facing PW ( ingress ) Receive Fault
      0x00000010 - Local PSN-facing PW ( egress ) Transmit Fault







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6. Security Considerations


   This document specifies only fixed identifiers, and not the protocols
   used to carry the encapsulated packets across the network.  Each such
   protocol may have its own set of security issues, but those issues
   are not affected by the identifiers specified herein.



7. Intellectual Property Disclaimer


   This document is being submitted for use in IETF standards
   discussions.



8. References


   [1] "Transport of Layer 2 Frames Over MPLS", draft-ietf-pwe3-
   control-protocol-05.txt. ( work in progress )


   [2] "SONET/SDH Circuit Emulation over Packet (CEP)", draft-ietf-
   pwe3-sonet-03.txt (work in progress).



9. Author Information



   Luca Martini
   Cisco Systems, Inc.
   9155 East Nichols Avenue, Suite 400
   Englewood, CO, 80112
   e-mail: lmartini@cisco.com



   W. Mark Townsley
   Cisco Systems
   7025 Kit Creek Road
   PO Box 14987
   Research Triangle Park, NC 27709
   e-mail: mark@townsley.net












Martini & Townsley                                              [Page 5]


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