Network Working Group                                        Fatai Zhang
Internet Draft                                                    Dan Li
Category: Standards Track                                         Huawei
                                                           D. Ceccarelli
                                                             D. Caviglia
                                                                Ericsson
                                                           Guoying Zhang
                                                                    CATR
                                                                P.Grandi
                                                               S.Belotti
                                                          Alcatel-Lucent
Expires: October 2011                                      April 6, 2011

           Link Management Protocol (LMP) extensions for G.709
                       Optical Transport Networks

             draft-zhang-ccamp-gmpls-g709-lmp-discovery-04.txt


Status of this Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as Internet-
   Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt.

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html.

   This Internet-Draft will expire on October 6, 2011.



Abstract

   Recent progress of the Optical Transport Network (OTN) has introduced
   new signal types (i.e., ODU0, ODU4, ODU2e and ODUflex) and new
   Tributary Slot granularity (1.25Gbps).



Zhang                   Expires October 2011                   [Page 1]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011


   Since equipments deployed prior to recently defined ITU-T
   recommendations only support 2.5 Gbps Tributary Slot granularity and
   ODU1, ODU2 and ODU3 containers, the compatibility problem should be
   considered. In addition, a Higher Order ODU (HO ODU) link may not
   support all the types of Lower Order ODU (LO ODU) signals defined by
   the new OTN standard because of the limitation of the devices at the
   two ends of a link. In these cases, the control plane is required to
   run the capability discovering functions for the evolutive OTN.

   This document describes the extensions to the Link Management
   Protocol (LMP) needed to discover the capability of HO ODU link,
   including the granularity of Tributary Slot to be used and the LO ODU
   signal types that the link can support.

Conventions used in this document

   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 [RFC2119].

Table of Contents


   1. Introduction ................................................. 3
   2. Terminology .................................................. 3
   3. Overview of the Evolutive G.709 .............................. 4
      3.1. Data Plane Backward Compatibility ....................... 5
   4. Link Capability Discovery Requirements ....................... 5
      4.1. Discovering the Granularity of the TS ................... 5
      4.2. Discovering the Supported LO ODU Signal Types ........... 6
   5. Extensions: LMP Link Summary Message ......................... 7
      5.1. Message Extension ....................................... 7
         5.1.1. LinkSummary Message ................................ 8
         5.1.2. LinkSummaryAck Message ............................. 8
         5.1.3. LinkSummaryNack Message ............................ 8
      5.2. Object Definitions ...................................... 8
      5.3. Procedures ............................................. 10
   6. Security Considerations ..................................... 12
   7. IANA Considerations ......................................... 12
   8. Acknowledgments ............................................. 12
   9. References .................................................. 12
      9.1. Normative References ................................... 12
      9.2. Informative References ................................. 12
   10. Authors' Addresses ......................................... 13
   11. Contributors ............................................... 14




Zhang                   Expires October 2011                   [Page 2]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011


1. Introduction

   The Link Management Protocol (LMP) defined in [RFC4204] is being
   developed as part of the Generalized MPLS (GMPLS) protocol suite to
   manage Traffic Engineering (TE) links.

   Recently, great progress has been made for the Optical Transport
   Networking (OTN) technologies in ITU-T. New ODU containers (i.e.,
   ODU0, ODU4, ODU2e and ODUflex) and a new Tributary Slot (TS)
   granularity (1.25Gbps) have been introduced by the [G709-V3],
   enhancing the flexibility of OTNs.

   With the evolution and deployment of G.709 technology, the backward
   compatibility problem requires to be considered. In data plane, the
   equipment supporting 1.25Gbps TS can combine the specific Tributary
   Slots together (e.g., combination of TS#i and TS#i+4 on a HO ODU2
   link) so that it can interwork with other equipments which support
   2.5Gbps TS. From the control plane point of view, it is necessary to
   discover which type of TS is supported at both ends of a link, so
   that it can choose and reserve the TS resources correctly in this
   link for the connection.

   Additionally, the requirement of discovering the signal types of
   Lower Order ODU (LO ODU) that can be supported by a Higher Order ODU
   (HO ODU) should be taken into account. Equipment at one end of a HO
   ODU link may not support to transport some types of LO ODU signals
   (e.g., may not support the ODUflex). In this case, this HO ODU link
   should not be selected for those types of LO ODU connections.

   From the perspective of control plane, it is necessary to discover
   the capability of a HO ODUk or OTUk link including the granularity of
   TS to be used and the LO ODU signal types that the link can support.
   Note that LO ODU type information can be, in principle, discovered by
   routing. Since in certain case, routing is not present (e.g. UNI case)
   we need to extend link management protocol capabilities to cover this
   aspect. Obviously, in case of routing presence, the discovering
   procedure by LMP could also be optional.

   This document extends the LMP and describes the solution of
   discovering HO ODU link capability.


2. Terminology

   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 [RFC2119].


Zhang                   Expires October 2011                   [Page 3]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011


3. Overview of the Evolutive G.709

   The traditional OTN standard [ITUT-G709] describes the optical
   transport hierarchy (OTH) and introduces three ODU signal types (i.e.,
   ODU1, ODU2 and ODU3). The ODUj can be mapped into one or more
   Tributary Slots (with a granularity of 2.5Gbps) of OPUk where j<k.
   The ODUj can also be mapped into OTUj (j=1, 2 or 3) directly.

   Recent revisions of ITU-T Recommendation G.709 have introduced new
   features for the evolutive Optical Transport Networks (OTN). New ODU
   signals, including ODU0, ODU4, ODU2e and ODUflex, are described in
   [G709-V3]. This document also defines the new multiplexing hierarchy
   for the evolutive OTN. In this multiplexing hierarchy, LO ODUj can be
   mapped into an OTUj, or multiplexed into a HO ODUk (where j<k) by
   occupying several tributary slots.

   In case of LO ODUj mapping into OTUj, the following mappings are
   defined:

      -  ODU1 into OTU1 mapping

      -  ODU2 into OTU2 mapping

      -  ODU3 into OTU3 mapping

      -  ODU4 into OTU4 mapping

   In case of LO ODUj multiplexing into HO ODUk, a new Tributary Slot
   granularity (i.e., 1.25Gbps) is introduced in [G709-V3]. For the
   evolutive OTN, the multiplexing of ODUj (j = 0, 1, 2, 2e, 3, flex)
   into an ODUk (k > j) signal can be depicted as follows:

      -  ODU0 into ODU1 multiplexing (with 1,25Gbps TS granularity)

      -  ODU0, ODU1, ODUflex into ODU2 multiplexing (with 1.25Gbps TS
         granularity)

      -  ODU1 into ODU2 multiplexing (with 2.5Gbps TS granularity)

      -  ODU0, ODU1, ODU2, ODU2e and ODUflex into ODU3 multiplexing
         (with 1.25Gbps TS granularity)

      -  ODU1, ODU2 into ODU3 multiplexing (with 2.5Gbps TS granularity)

      -  ODU0, ODU1, ODU2, ODU2e, ODU3 and ODUflex into ODU4
         multiplexing (with 1.25Gbps TS granularity)



Zhang                   Expires October 2011                   [Page 4]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011


3.1. Data Plane Backward Compatibility

   Equipment supporting a 1.25Gbps TS structure for OPU2 or OPU3 must be
   backward compatible with equipment which supports only the 2.5G TS
   structure. Specific Tributary Slots must be combined together (e.g.,
   combination of TS#i and TS#i+4 on a HO ODU2 link) for the LO ODU at
   one end of the HO ODU link which supports the 1.25Gbps TS structure,
   so that the LO ODU can be carried on the HO ODU link correctly.

   In the following example, suppose that the two ends of an ODU2 or
   ODU3 link support different TS structure, where node A supports the
   1.25Gbps TS structure, while node B supports the 2.5Gbps TS, as shown
   in the figure below:

          +-----+                            +-----+
          |     |                            |     |
          |  A  +-------ODU2/ODU3 link-------+  B  |
          |     |                            |     |
          +-----+                            +-----+
     (Support 1.25G TS)                  (Support 2.5G TS)


   -  In case of ODU1 multiplexing into ODU2, node A maps the ODU1 into
      the TS#i and TS#i+4 (where i<=4) (with the granularity of 1.25Gbps)
      of OPU2, so that node B can retrieve the ODU1 from the TS#i (with
      the granularity of 2.5Gbps) of the OPU2, and vice versa.

   -  In case of ODU1 multiplexing into ODU3, node A maps the ODU1 into
      the TS#i and TS#i+16 (where i<=16) (with the granularity of
      1.25Gbps) of OPU3, so that node B can retrieve the ODU1 from the
      TS#i (with the granularity of 2.5Gbps) of the OPU3, and vice versa.

   -  In case of ODU2 multiplexing into ODU3, node A maps the ODU2 into
      the TS#a/TS#a+16, TS#b/TS#b+16, TS#c/TS#c+16 and TS#d/TS#d+16
      (where a<b<c<d<=16) (with the granularity of 1.25Gbps) of OPU3, so
      that node B can retrieve the ODU2 from the TS#a, TS#b, TS#c and
      TS#d (with the granularity of 2.5Gbps) of the OPU3, and vice versa.

4. Link Capability Discovery Requirements

4.1. Discovering the Granularity of the TS

   As described in section 3.1, if the two ends of a link use different
   granularities of TS, The LO ODU must be mapped into specific combined
   Tributary Slots in the end of link with TS of 1.25Gbps.




Zhang                   Expires October 2011                   [Page 5]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011


   From the perspective of control plane, when creating a LO ODU
   connection, the node MUST select and reserve specific TS for the
   connection if the two ends of a link use different granularities of
   TS. For example, for an ODU2 link, we suppose that node A only
   supports the 2.5Gbps TS while node B supports the 1.25Gbps TS. When
   node B receives a Path message from node A requesting an ODU1
   connection, node B MUST reserve the TS#i and TS#i+4 (where i<=4)
   (with the granularity of 1.25Gbps) and tell node A via the label
   carried in the Resv message that the TS#i (with the granularity of
   2.5Gbps) among the 4 slots has been reserved for the ODU1 connection.
   Otherwise, the reservation procedure will fail.

          +-----+         Path          +-----+
          |     |    ------------>      |     |
          |  A  +-------ODU2 link-------+  B  |
          |     |    <-------------     |     |
          +-----+         Resv          +-----+
     (Support 2.5G TS)              (Support 1.25G TS)

   Therefore, for an ODU2 or ODU3 link, in order to reserve TS resources
   correctly for a LO ODU connection, the control plane of the two ends
   MUST know which granularity the other end can support before creating
   the LO ODU connection.



4.2. Discovering the Supported LO ODU Signal Types

   Many new ODU signal types are introduced by [G709-V3], such as ODU0,
   ODU4, ODU2e and ODUflex. It is possible that equipment does not
   always support all the LO ODU signal types introduced by [G709-V3].
   If one end of a HO ODU link can not support a certain LO ODU signal
   type and there is no HO ODU FA LSP able to support this LO ODU signal,
   the HO ODU link/FA LSP can not be selected to carry such type of LO
   ODU connection.

   For example, in the following figure, if the interfaces IF1, IF2, IF8,
   IF7, IF5 and IF6 can support ODUflex signals, while the interfaces IF
   3 and IF4 can not support ODUflex signals. In this case, if one
   ODUflex connection from A to C is requested, and there is no HO ODU
   FA LSP from node A to C through node B, link #1 and #2 should be
   excluded, link #3 and link #4 are the candidates (the possible path
   could be A-D-C through link #3 and link #4).






Zhang                   Expires October 2011                   [Page 6]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011


                              +-----+
                    link #3   |     |  link #4
            +-----------------+  D  +-----------------+
            |              IF8|     |IF7              |
            |                 +-----+                 |
            |                                         |
            |IF1                                   IF6|
         +--+--+              +-----+              +--+--+
         |     |    link #1   |     |    link #2   |     |
         |  A  +--------------+  B  +--------------+  C  |
         |     |IF2        IF3|     |IF4        IF5|     |
         +-----+              +-----+              +-----+


   Therefore, it is necessary for the two ends of a HO ODU link to
   discover which types of LO ODU can be supported by the HO ODU link.
   After discovering, the capability information can be flooded by IGP,
   so that the correct path for an ODU connection can be calculated.

5. Extensions: LMP Link Summary Message

   [RFC4204] defines the Link Management Protocol (LMP) which consists
   of four main procedures: control channel management, link property
   correlation, link connectivity verification, and fault management. As
   part of LMP, the link property correlation is used to verify the
   consistency of the TE and data link information on both sides of a
   link. This document extends the link property correlation procedure
   to discover the capability of both sides of a HO ODU link.

   The designated HO ODU overhead bytes (e.g., the GCC1 and GCC2
   overhead bytes) can be used as the control channel to carry the LMP
   message after the HO ODU link is created. The out-of-band Data
   Communication Network (DCN) can also be used.

5.1. Message Extension

   Three messages are used for link property correlation: LinkSummary,
   LinkSummaryAck and LinkSummaryNack Message. This document does not
   change the basic procedure of LMP but just add a new subobject (HO
   ODU Link Capability Subobject) in the DATA_LINK object to carry the
   capability of one end of a HO ODU link.

   The formats of LinkSummary, LinkSummaryAck and LinkSummaryNack
   messages are defined in [RFC4204].



Zhang                   Expires October 2011                   [Page 7]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011


5.1.1. LinkSummary Message

   The local end of a TE link can send a LinkSummary message to the
   remote end to start the negotiation about the capability that the TE
   link can support.

   One new Subobject named HO ODU Link Capability Subobject in the
   DATA_LINK object is introduced by this document. This new subobect is
   used to tell the remote end of the HO ODU link which TS granularity
   and which LO ODU signal types that the local end can support. When
   the DATA_LINK object carries the new HO ODU Link Capability Subobject,
   the N flag SHOULD be set to 1 which means that the subobject is
   negotiable.

5.1.2. LinkSummaryAck Message

   The LinkSummaryAck message is used to tell the remote end that it has
   the same capability as the remote end after the LinkSummary message
   is received by the local end.

5.1.3. LinkSummaryNack Message

   The LinkSummaryNack message is used to tell the remote end that it
   has different capability from the remote end after the LinkSummary
   message is received by the local end. The LinkSummaryNack message
   also carries the HO ODU Link Capability Subobject in the DATA_LINK
   object to tell the remote end the exact capability of the HO ODU link
   after negotiation, i.e., the granularity of TS and the types of LO
   ODU that both side of the HO ODU link can support.

5.2. Object Definitions

   A new HO ODU Link Capability subobject type is introduced to the DATA
   LINK object to carry the HO ODU link capability information. The
   format of the new subobject is defined as follow:

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |    Type       |    Length     |OD(T)Uk| T |     Reserved      |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |A|B|C|D|E|F|G|  LO ODU Flags   |            Reserved           |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+




Zhang                   Expires October 2011                   [Page 8]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011


   Type (8 bits):

   The value of this subobject type is TBD.

   Length (8 bits):

   The Length field contains the total length of the subobject in bytes,
   including the Type and Length fields. As for RFC 4204, the Length
   MUST be at least 4, and MUST be a multiple of 4. Value of this field
   is 8.



   OD(T)Uk (4 bits):

   This field is used to indicate the HO ODU link type (in case of LO
   ODUj multiplexing into HO ODUk, wherein j<k) or the OTU link type (in
   case of LO ODUk mapping into OTUk).

   OD(T)Uk field     Signal type of HO ODUk or OTUk
   -------------     ------------------------------
      0              Reserved (for future use)
      1              HO ODU1 or OTU1
      2              HO ODU2 or OTU2
      3              HO ODU3 or OTU3
      4              HO ODU4 or OTU4
      5-15           Reserved (for future use)


   T (2 bits):

   The T bits are used to indicate the granularity of the TS of the HO
   ODU link.

   T field      TS type
   -------      -------
     0          1.25Gbps TS granularity
     1          2.5Gbps TS granularity
     2-3        Reserved (for future use)


   LO ODU flags (A|B|C|D|E|F|G) (16 bits):

   These flags are used to indicate which LO ODU signal types that one
   end or the both end can support. The flags will be set to 1 if the


Zhang                   Expires October 2011                   [Page 9]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011


   corresponding LO ODU signal types are supported to be mapped or
   multiplexed into the OTUk or HO ODUk link.

   This rule imposes that:

   -  At least one flag is set to 1.

   -  When the ODUk flag corresponding to the signal type HO ODUk/OTUk
      is set to 1, then the signal type has to be intended as LO ODUk
      and direct mapping over OTUk is supported.

   -  When an ODUk flag not corresponding to the signal type HO
      ODUk/OTUk is set to 1 then the signal type has to be intended as
      HO ODUk and multiplexing of LO ODUj over HO ODUk is supported.

        Flag A: indicates whether LO ODU0 is supported.

        Flag B: indicates whether LO ODU1 is supported.

        Flag C: indicates whether LO ODU2 is supported.

        Flag D: indicates whether LO ODU3 is supported.

        Flag E: indicates whether LO ODU4 is supported.

        Flag F: indicates whether LO ODU2e is supported.

        Flag G: indicates whether LO ODUflex is supported.

   For example, if one end of an OTU2 link supports LO ODU0, LO ODU1, LO
   ODUflex into HO ODU2 multiplexing and supports LO ODU2 into OTU2
   mapping, the flags A, B, C, and G will be set to 1.

   As a further example, if one end of an OTU2 link supports only LO
   ODU2 into OTU2 mapping but no multiplexing, only flag C will be set
   to 1.

   The remaining flags are reserved for future use and MUST be set to 0.

5.3. Procedures

   The Link Summary messages used for capability discovery for HO ODUk
   or OTUk link are sent between adjacent nodes after the HO ODU link is
   created or driven by some events (e.g., an operator command). The
   procedure is described below:




Zhang                   Expires October 2011                  [Page 10]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011


   o  The local end of the HO ODU link sends a LinkSummary message
      including one or more DATA_LINK objects, each of which contains
      the Local_Interface_Id, the Remote_Interface_Id, and the HO ODU
      link capability subobject. This subobject carries the capability
      that the local end can support, i.e., the granularity of TS and
      the set of LO ODU signal types that the local end can support. The
      LinkSummary message is sent to the remote end.

   o  On receipt of the LinkSummary message, the remote end of the HO
      ODU link firstly determines whether the local/remote Interface_Id
      mappings match those that are stored locally as described in
      [RFC4204], and then obtains the HO ODU link capability subobject
      and determines the capability of the HO ODU link that both ends
      can support. The detail procedures are as follow:

      -  Only if both ends support the 1.25Gbps TS, the remote end would
         choose the 1.25Gbps as the negotiated granularity for the HO
         ODU link. In other cases, the 2.5Gbps TS MUST be used (i.e., if
         the local end can support 1.25Gbps, and the remote end can
         support 2.5Gbps, and then the local end should imitate 2.5Gbps).

      -  The remote end compares the two sets of LO ODU signal types
         that the local end and the remote end can support, and
         calculates the intersection of them, i.e., extracts all the LO
         ODU signal types that both two ends can support. This
         intersection is the set of LO ODU signal types that the HO ODU
         link can support.

   o  If both the two ends support the same capability, i.e., they
      support the same granularity of TS and the same LO ODU signal
      types, the remote end replies a LinkSummaryAck message to the
      local end. So the both ends know what capability the HO ODU link
      can support.

   o  If the two ends support different capabilities, i.e., they support
      different granularities of TS or different LO ODU signal types,
      the remote end replies a LinkSummaryNack message to the local end.
      The LinkSummaryNack message carries an ERROR_CODE object and one
      or more DATA_LINK objects. The ERROR_CODE object indicates that
      the two ends of the HO ODU link support different capabilities,
      and the DATA_LINK object carries the HO ODU link capability
      subobject which contains the negotiated granularity of TS and the
      set of LO ODU signal types that both ends can support. The local
      end can learn the HO ODU link capability after receiving the
      LinkSummaryNack message.




Zhang                   Expires October 2011                  [Page 11]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011


   o  If the remote end does not support the HO ODU link capability
      negotiation procedure, the LinkSummaryNack message MUST be
      responded with an ERROR_CODE indicating the reason of rejection.



6. Security Considerations

   TBD.

7. IANA Considerations

   TBD.

8. Acknowledgments

   TBD.

9. References

9.1. Normative References

   [RFC2119]   Bradner, S., "Key words for use in RFCs to Indicate
               Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC4204]   J. Lang, Ed., "Link Management Protocol (LMP)", RFC 4204,
               October 2005.

   [ITUT-G709] ITU-T, "Interface for the Optical Transport Network
               (OTN)", G.709 Recommendation, March 2003.

   [G709-V3]   ITU-T, "Interfaces for the Optical Transport Network
               (OTN)", G.709 Recommendation, December 2009.



9.2. Informative References

   [RFC3945]   Mannie, E., "Generalized Multi-Protocol Label Switching
               (GMPLS) Architecture", RFC 3945, October 2004.

   [RFC4328]   D. Papadimitriou, Ed. "Generalized Multi-Protocol Label
               Switching (GMPLS) Signaling Extensions for G.709 Optical
               Transport Networks Control", RFC 4328, Jan 2006.





Zhang                   Expires October 2011                  [Page 12]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011


10. Authors' Addresses

   Fatai Zhang
   Huawei Technologies
   F3-5-B R&D Center, Huawei Base
   Bantian, Longgang District
   Shenzhen 518129 P.R.China

   Phone: +86-755-28972912
   Email: zhangfatai@huawei.com


   Dan Li
   Huawei Technologies Co., Ltd.
   F3-5-B R&D Center, Huawei Base,
   Bantian, Longgang District
   Shenzhen 518129 P.R.China

   Phone: +86-755-28972910
   Email: huawei.danli@huawei.com

   Daniele Ceccarelli
   Ericsson
   Via A. Negrone 1/A
   Genova - Sestri Ponente
   Italy

   Email: daniele.ceccarelli@ericsson.com


   Diego Caviglia
   Ericsson
   Via A. Negrone 1/A
   Genova - Sestri Ponente
   Italy

   Email: diego.caviglia@ericsson.com

   Guoying Zhang
   China Academy of Telecommunication Research of MII
   11 Yue Tan Nan Jie Beijing, P.R.China



Zhang                   Expires October 2011                  [Page 13]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011



   Phone: +86-10-68094272
   Email: zhangguoying@mail.ritt.com.cn

   Pietro Grandi
   Alcatel-Lucent
   Optics CTO
   Via Trento 30 20059 Vimercate (Milano) Italy
   +39 039 6864930

   Email: pietro_vittorio.grandi@alcatel-lucent.it

   Sergio Belotti
   Alcatel-Lucent
   Optics CTO
   Via Trento 30 20059 Vimercate (Milano) Italy
   +39 039 6863033

   Email: sergio.belotti@alcatel-lucent.it


11. Contributors

   Yi Lin
   Huawei Technologies Co., Ltd.
   F3-5-B R&D Center, Huawei Base,
   Bantian, Longgang District
   Shenzhen 518129 P.R.China

   Phone: +86-755-28972914
   Email: yi.lin@huawei.com


Intellectual Property

   The IETF Trust takes no position regarding the validity or scope of
   any Intellectual Property Rights or other rights that might be
   claimed to pertain to the implementation or use of the technology
   described in any IETF Document or the extent to which any license
   under such rights might or might not be available; nor does it
   represent that it has made any independent effort to identify any
   such rights.




Zhang                   Expires October 2011                  [Page 14]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011


   Copies of Intellectual Property disclosures made to the IETF
   Secretariat and any assurances of licenses to be made available, or
   the result of an attempt made to obtain a general license or
   permission for the use of such proprietary rights by implementers or
   users of this specification can be obtained from the IETF on-line IPR
   repository at http://www.ietf.org/ipr

   The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights that may cover technology that may be required to implement
   any standard or specification contained in an IETF Document. Please
   address the information to the IETF at ietf-ipr@ietf.org.

   The definitive version of an IETF Document is that published by, or
   under the auspices of, the IETF. Versions of IETF Documents that are
   published by third parties, including those that are translated into
   other languages, should not be considered to be definitive versions
   of IETF Documents. The definitive version of these Legal Provisions
   is that published by, or under the auspices of, the IETF. Versions of
   these Legal Provisions that are published by third parties, including
   those that are translated into other languages, should not be
   considered to be definitive versions of these Legal Provisions.

   For the avoidance of doubt, each Contributor to the IETF Standards
   Process licenses each Contribution that he or she makes as part of
   the IETF Standards Process to the IETF Trust pursuant to the
   provisions of RFC 5378. No language to the contrary, or terms,
   conditions or rights that differ from or are inconsistent with the
   rights and licenses granted under RFC 5378, shall have any effect and
   shall be null and void, whether published or posted by such
   Contributor, or included with or in such Contribution.


Disclaimer of Validity

   All IETF Documents and the information contained therein are provided
   on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE
   REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE
   IETF TRUST AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL
   WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY
   WARRANTY THAT THE USE OF THE INFORMATION THEREIN WILL NOT INFRINGE
   ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS
   FOR A PARTICULAR PURPOSE.


Full Copyright Statement



Zhang                   Expires October 2011                  [Page 15]


draft-zhang-ccamp-gmpls-g.709-lmp-discovery-04.txt           April 2011



   Copyright (c) 2010 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.



































Zhang                   Expires October 2011                  [Page 16]