ietf-connection-oriented-oam

This YANG module defines the generic configuration, statistics and RPC for connection-oriented OAM to be used within IETF in a p...

  • Version: 2019-04-16

    ietf-connection-oriented-oam@2019-04-16


    
      module ietf-connection-oriented-oam {
    
        yang-version 1.1;
    
        namespace
          "urn:ietf:params:xml:ns:yang:ietf-connection-oriented-oam";
    
        prefix co-oam;
    
        import ietf-yang-types {
          prefix yang;
        }
        import ietf-inet-types {
          prefix inet;
        }
        import ietf-interfaces {
          prefix if;
        }
    
        organization "IETF LIME Working Group";
    
        contact
          "WG Web:    http://datatracker.ietf.org/wg/lime
         WG List:   <mailto:lime@ietf.org>
         Editor:    Deepak Kumar <dekumar@cisco.com>
         Editor:    Qin Wu <bill.wu@huawei.com>
         Editor:    Michael Wang <wangzitao@huawei.com>";
    
        description
          "This YANG module defines the generic configuration,
         statistics and RPC for connection-oriented OAM
         to be used within IETF in a protocol-independent manner.
         Functional-level abstraction is independent
         with YANG modeling. It is assumed that each protocol
         maps corresponding abstracts to its native format.
         Each protocol may extend the YANG data model defined
         here to include protocol-specific extensions
    
         Copyright (c) 2019 IETF Trust and the persons identified as
         authors of the code.  All rights reserved.
    
         Redistribution and use in source and binary forms, with or
         without modification, is permitted pursuant to, and subject
         to the license terms contained in, the Simplified BSD License
         set forth in Section 4.c of the IETF Trust's Legal Provisions
         Relating to IETF Documents
         (http://trustee.ietf.org/license-info).
    
         This version of this YANG module is part of RFC 8531; see
         the RFC itself for full legal notices.";
    
        revision "2019-04-16" {
          description "Initial revision.";
          reference
            "RFC 8531: Generic YANG Data Model for Connection-
            Oriented Operations, Administration, and Maintenance (OAM)
            Protocols";
    
        }
    
    
        feature connectivity-verification {
          description
            "This feature indicates that the server supports
           executing a connectivity verification OAM command and
           returning a response.  Servers that do not advertise
           this feature will not support executing a
           connectivity verification command or RPC model for a
           connectivity verification command.";
        }
    
        feature continuity-check {
          description
            "This feature indicates that the server supports
           executing a Continuity Check OAM command and
           returning a response.  Servers that do not advertise
           this feature will not support executing a
           Continuity Check command or RPC model for a
           Continuity Check command.";
        }
    
        feature traceroute {
          description
            "This feature indicates that the server supports
           executing a traceroute OAM command and
           returning a response.  Servers that do not advertise
           this feature will not support executing a
           traceroute command or RPC model for a
           traceroute command.";
        }
    
        feature mip {
          description
            "This feature indicates that the Maintenance
           Intermediate Point (MIP) needs to be explicitly configured";
        }
    
        identity technology-types {
          description
            "This is the base identity of technology types that are
           TRILL, MPLS-TP, etc.";
        }
    
        identity command-sub-type {
          description
            "Defines different RPC command subtypes,
           e.g., TRILL OAM as specified in RFC 6905; this is
           optional for most cases.";
          reference
            "RFC 6905: Requirements for OAM in Transparent
            Interconnection of Lots of Links (TRILL)";
    
        }
    
        identity on-demand {
          base command-sub-type;
          description
            "On-demand activation indicates that the tool is activated
           manually to detect a specific anomaly.
           An on-demand OAM method requires only transient configuration.";
          reference
            "RFC 7276: An Overview of Operations, Administration, and
            Maintenance (OAM) Tools";
    
        }
    
        identity proactive {
          base command-sub-type;
          description
            "Proactive activation indicates that the tool is activated on a
           continual basis, where messages are sent periodically, and errors
           are detected when a certain number of expected messages are not
           received.  A proactive OAM method requires persistent
           configuration.";
          reference
            "RFC 7276: An Overview of Operations, Administration, and
            Maintenance (OAM) Tools";
    
        }
    
        identity name-format {
          description
            "This defines the name format, CFM (IEEE 802.1Q) defines varying
           styles of names.  It is expected that name format is an identity
           reference to be extended with new types.";
        }
    
        identity name-format-null {
          base name-format;
          description
            "Defines name format as null.";
        }
    
        identity identifier-format {
          description
            "Identifier-format identity can be augmented to define other
           format identifiers used in MEP-ID, etc.";
        }
    
        identity identifier-format-integer {
          base identifier-format;
          description
            "Defines identifier-format to be integer.";
        }
    
        identity defect-types {
          description
            "Defines different defect types, e.g.,
           Remote Defect Indication (RDI), loss of continuity.";
        }
    
        identity rdi {
          base defect-types;
          description
            "The RDI indicates the
           aggregate health of the remote Maintenance End Points (MEPs).";
        }
    
        identity remote-mep-defect {
          base defect-types;
          description
            "Indicates that one or more of the remote MEPs are
           reporting a failure.";
        }
    
        identity loss-of-continuity {
          base defect-types;
          description
            "Indicates that there are no proactive Continuity Check (CC)
           OAM packets from the source MEP (and in the case of
           Connectivity Verification, this includes the requirement to have
           the expected unique, technology-dependent source MEP identifier)
           received within the interval.";
          reference
            "RFC 6371: Operations, Administration, and Maintenance
            Framework for MPLS-Based Transport Networks";
    
        }
    
        identity cv-defect {
          base defect-types;
          description
            "This function should support monitoring between the MEPs
           and, in addition, between a MEP and MIP.  When performing
           Connectivity Verification, the Continuity Check and
           Connectivity Verification (CC-V) messages need to include
           unique identification of the MEG that is being monitored and
           the MEP that originated the message.";
          reference
            "RFC 6371: Operations, Administration, and Maintenance
            Framework for MPLS-Based Transport Networks";
    
        }
    
        identity invalid-oam-defect {
          base defect-types;
          description
            "Indicates that one or more invalid OAM messages have been
           received and that 3.5 times that OAM message transmission
           interval has not yet expired.";
        }
    
        identity cross-connect-defect {
          base defect-types;
          description
            "Indicates that one or more cross-connect defect
           (for example, a service ID does not match the VLAN)
           messages have been received and that 3.5 times that OAM message
           transmission interval has not yet expired.";
        }
    
        typedef mep-name {
          type string;
          description
            "Generic administrative name for a MEP.";
        }
    
        typedef time-interval {
          type decimal64 {
            fraction-digits 2;
          }
          units "milliseconds";
          description
            "Time interval between packets in milliseconds.
           Time interval should not be less than 0.
           0 means no packets are sent.";
        }
    
        typedef md-name-string {
          type string;
          description
            "Generic administrative name for Maintenance Domain (MD).";
        }
    
        typedef ma-name-string {
          type string;
          description
            "Generic administrative name for a
           Maintenance Association (MA).";
        }
    
        typedef oam-counter32 {
          type yang:zero-based-counter32;
          description
            "Define 32-bit counter for OAM.";
        }
    
        typedef md-level {
          type uint32 {
            range "0..255";
          }
          description
            "Maintenance Domain Level.  The level may be restricted in
           certain protocols (e.g., protocol in layer 0 to layer 7).";
        }
    
        grouping maintenance-domain-reference {
          description
            "This grouping uniquely identifies a Maintenance Domain.";
          leaf maintenance-domain {
            type leafref {
              path
                "/co-oam:domains/co-oam:domain/co-oam:md-name-string";
            }
            description
              "A reference to a specific Maintenance Domain.";
          }
        }  // grouping maintenance-domain-reference
    
        grouping maintenance-association-reference {
          description
            "This grouping uniquely identifies a
           Maintenance Association.  It consists
           of a maintenance-domain-reference and
           a maintenance-association leafref.";
          uses maintenance-domain-reference;
    
          leaf maintenance-association {
            type leafref {
              path
                "/co-oam:domains/co-oam:domain[co-oam:md-name-string "
                  + "= current()/../maintenance-domain]/co-oam:mas"
                  + "/co-oam:ma/co-oam:ma-name-string";
            }
            description
              "A reference to a specific Maintenance Association.";
          }
        }  // grouping maintenance-association-reference
    
        grouping maintenance-association-end-point-reference {
          description
            "This grouping uniquely identifies
           a Maintenance Association.  It consists
           of a maintenance-association-reference and
           a maintenance-association-end-point leafref.";
          uses maintenance-association-reference;
    
          leaf maintenance-association-end-point {
            type leafref {
              path
                "/co-oam:domains/co-oam:domain[co-oam:md-name-string "
                  + "= current()/../maintenance-domain]/co-oam:mas"
                  + "/co-oam:ma[co-oam:ma-name-string = "
                  + "current()/../maintenance-association]"
                  + "/co-oam:mep/co-oam:mep-name";
            }
            description
              "A reference to a specific Maintenance
             association End Point.";
          }
        }  // grouping maintenance-association-end-point-reference
    
        grouping time-to-live {
          description "Time to Live grouping.";
          leaf ttl {
            type uint8;
            description "Time to Live.";
          }
        }  // grouping time-to-live
    
        grouping defect-message {
          description "Defect Message.";
          choice defect {
            description
              "Defect Message choices.";
            case defect-null {
              description
                "This is a placeholder when no defect status is needed.";
              leaf defect-null {
                type empty;
                description
                  "There is no defect to be defined; it will be defined in
                 a technology-specific model.";
              }
            }  // case defect-null
    
            case defect-code {
              description
                "This is a placeholder to display defect code.";
              leaf defect-code {
                type int32;
                description
                  "Defect code is integer value specific to a technology.";
              }
            }  // case defect-code
          }  // choice defect
        }  // grouping defect-message
    
        grouping mep-address {
          description "Grouping for MEP Address";
          choice mep-address {
            default "ip-address";
            description "MEP Addressing.";
            case mac-address {
              description
                "MAC Address based MEP Addressing.";
              leaf mac-address {
                type yang:mac-address;
                description "MAC Address.";
              }
            }  // case mac-address
    
            case ip-address {
              description
                "IP Address based MEP Addressing.";
              leaf ip-address {
                type inet:ip-address;
                description "IP Address.";
              }
            }  // case ip-address
          }  // choice mep-address
        }  // grouping mep-address
    
        grouping mip-address {
          description "MIP Address.";
          choice mip-address {
            default "ip-address";
            description "MIP Addressing.";
            case mac-address {
              description
                "MAC Address based MIP Addressing.";
              leaf mac-address {
                type yang:mac-address;
                description
                  "MAC Address of Maintenance Intermediate Point";
              }
            }  // case mac-address
    
            case ip-address {
              description
                "IP Address based MIP Addressing.";
              leaf ip-address {
                type inet:ip-address;
                description "IP Address.";
              }
            }  // case ip-address
          }  // choice mip-address
        }  // grouping mip-address
    
        grouping maintenance-domain-id {
          description
            "Grouping containing leaves sufficient to identify
           a Maintenance Domain.";
          leaf technology {
            type identityref {
              base technology-types;
            }
            mandatory true;
            description
              "Defines the technology.";
          }
    
          leaf md-name-string {
            type md-name-string;
            mandatory true;
            description
              "Defines the generic administrative Maintenance Domain name.";
          }
        }  // grouping maintenance-domain-id
    
        grouping md-name {
          description "MD name.";
          leaf md-name-format {
            type identityref {
              base name-format;
            }
            description
              "Maintenance Domain Name format.";
          }
    
          choice md-name {
            description "MD name.";
            leaf md-name-null {
              when
                "derived-from-or-self(../md-name-format,"
                  + "'name-format-null')" {
                description
                  "MD name format is equal to null format.";
              }
              type empty;
              description "MD name null.";
            }
          }  // choice md-name
        }  // grouping md-name
    
        grouping ma-identifier {
          description
            "Grouping containing leaves sufficient to identify an MA.";
          leaf ma-name-string {
            type ma-name-string;
            description "MA name string.";
          }
        }  // grouping ma-identifier
    
        grouping ma-name {
          description "MA name.";
          leaf ma-name-format {
            type identityref {
              base name-format;
            }
            description "MA name format.";
          }
    
          choice ma-name {
            description "MA name.";
            leaf ma-name-null {
              when
                "derived-from-or-self(../ma-name-format,"
                  + "'name-format-null')" {
                description "MA.";
              }
              type empty;
              description "Empty";
            }
          }  // choice ma-name
        }  // grouping ma-name
    
        grouping mep-id {
          description "MEP ID.";
          choice mep-id {
            default "mep-id-int";
            description "MEP ID.";
            leaf mep-id-int {
              type int32;
              description
                "MEP ID
                 in integer format.";
            }
          }  // choice mep-id
    
          leaf mep-id-format {
            type identityref {
              base identifier-format;
            }
            description "MEP ID format.";
          }
        }  // grouping mep-id
    
        grouping mep {
          description
            "Defines elements within the MEP.";
          leaf mep-name {
            type mep-name;
            mandatory true;
            description
              "Generic administrative name of the
             MEP.";
          }
    
          uses mep-id;
    
          uses mep-address;
        }  // grouping mep
    
        grouping monitor-stats {
          description
            "Grouping for monitoring statistics; this will be augmented
           by others who use this component.";
          choice monitor-stats {
            default "monitor-null";
            description
              "Define the monitor stats.";
            case monitor-null {
              description
                "This is a placeholder when
               no monitoring statistics are needed.";
              leaf monitor-null {
                type empty;
                description
                  "There are no monitoring statistics to be defined.";
              }
            }  // case monitor-null
          }  // choice monitor-stats
        }  // grouping monitor-stats
    
        grouping connectivity-context {
          description
            "Grouping defining the connectivity context for an MA,
           for example, an LSP for MPLS-TP.  This will be
           augmented by each protocol that uses this component.";
          choice connectivity-context {
            default "context-null";
            description "Connectivity context.";
            case context-null {
              description
                "This is a placeholder when no context is needed.";
              leaf context-null {
                type empty;
                description
                  "There is no context to be defined.";
              }
            }  // case context-null
          }  // choice connectivity-context
        }  // grouping connectivity-context
    
        grouping cos {
          description
            "Grouping for Priority used in transmitted packets,
           for example, in the CoS field in MPLS-TP.";
          leaf cos-id {
            type uint8;
            description
              "Class of Service (CoS) ID; this value is used to indicate
             Class of Service information .";
          }
        }  // grouping cos
    
        grouping mip-grouping {
          description
            "Grouping for MIP
           configuration.";
          uses mip-address;
        }  // grouping mip-grouping
    
        container domains {
          description
            "Contains configuration related data.  Within the
           container, there is a list of fault domains.  Each
           domain has a list of MAs.";
          list domain {
            key "technology md-name-string";
            description
              "Define a list of Domains within the
             ietf-connection-oriented-oam module.";
            uses maintenance-domain-id;
    
            uses md-name;
    
            leaf md-level {
              type md-level;
              description "Define the MD level.";
            }
    
            container mas {
              description
                "Contains configuration-related data.  Within the
               container, there is a list of MAs.  Each MA has a
               list of MEPs.";
              list ma {
                key "ma-name-string";
                description
                  "Maintenance Association list.";
                uses ma-identifier;
    
                uses ma-name;
    
                uses connectivity-context;
    
                uses cos {
                  description
                    "Default class of service for this MA;
                   it may be overridden for particular MEPs,
                   sessions, or operations.";
                }
    
                leaf cc-enable {
                  type boolean;
                  description
                    "Indicate whether the CC is enabled.";
                }
    
                list mep {
                  key "mep-name";
                  description
                    "Contain a list of MEPs.";
                  uses mep;
    
                  uses cos;
    
                  leaf cc-enable {
                    type boolean;
                    description
                      "Indicate whether the CC is enabled.";
                  }
    
                  list session {
                    key "session-cookie";
                    description
                      "Monitoring session to/from a particular remote MEP.
                     Depending on the protocol, this could represent
                     CC messages received from a single remote MEP (if the
                     protocol uses multicast CCs) or a target to which
                     unicast echo request CCs are sent and from which
                     responses are received (if the protocol uses a
                     unicast request/response mechanism).";
                    leaf session-cookie {
                      type uint32;
                      description
                        "Cookie to identify different sessions, when there
                       are multiple remote MEPs or multiple sessions to
                       the same remote MEP.";
                    }
    
                    container destination-mep {
                      description
                        "Destination MEP.";
                      uses mep-id;
                    }  // container destination-mep
    
                    container destination-mep-address {
                      description
                        "Destination MEP Address.";
                      uses mep-address;
                    }  // container destination-mep-address
    
                    uses cos;
                  }  // list session
                }  // list mep
    
                list mip {
                  if-feature mip;
                  key "name";
                  description "List for MIP.";
                  leaf name {
                    type string;
                    description
                      "Identifier of Maintenance Intermediate Point";
                  }
    
                  leaf interface {
                    type if:interface-ref;
                    description "Interface.";
                  }
    
                  uses mip-grouping;
                }  // list mip
              }  // list ma
            }  // container mas
          }  // list domain
        }  // container domains
    
        notification defect-condition-notification {
          description
            "When the defect condition is met, this notification is sent.";
          leaf technology {
            type identityref {
              base technology-types;
            }
            description "The technology.";
          }
    
          leaf md-name-string {
            type leafref {
              path "/domains/domain/md-name-string";
            }
            mandatory true;
            description
              "Indicate which MD the defect belongs to.";
          }
    
          leaf ma-name-string {
            type leafref {
              path "/domains/domain/mas/ma/ma-name-string";
            }
            mandatory true;
            description
              "Indicate which MA the defect is associated with.";
          }
    
          leaf mep-name {
            type leafref {
              path "/domains/domain/mas/ma/mep/mep-name";
            }
            description
              "Indicate which MEP is seeing the defect.";
          }
    
          leaf defect-type {
            type identityref {
              base defect-types;
            }
            description
              "The currently active defects on the specific MEP.";
          }
    
          container generating-mepid {
            description
              "Indicate who is generating the defect (if known). If
             unknown, set it to 0.";
            uses mep-id;
          }  // container generating-mepid
    
          uses defect-message {
            description
              "Defect message to provide more details.";
          }
        }  // notification defect-condition-notification
    
        notification defect-cleared-notification {
          description
            "When the defect is cleared, this notification is sent.";
          leaf technology {
            type identityref {
              base technology-types;
            }
            description "The technology.";
          }
    
          leaf md-name-string {
            type leafref {
              path "/domains/domain/md-name-string";
            }
            mandatory true;
            description
              "Indicate which MD the defect belongs to";
          }
    
          leaf ma-name-string {
            type leafref {
              path "/domains/domain/mas/ma/ma-name-string";
            }
            mandatory true;
            description
              "Indicate which MA the defect is associated with.";
          }
    
          leaf mep-name {
            type leafref {
              path "/domains/domain/mas/ma/mep/mep-name";
            }
            description
              "Indicate which MEP is seeing the defect.";
          }
    
          leaf defect-type {
            type identityref {
              base defect-types;
            }
            description
              "The currently active defects on the specific MEP.";
          }
    
          container generating-mepid {
            description
              "Indicate who is generating the defect (if known). If
             unknown, set it to 0.";
            uses mep-id;
          }  // container generating-mepid
    
          uses defect-message {
            description
              "Defect message to provide more details.";
          }
        }  // notification defect-cleared-notification
    
        rpc continuity-check {
          if-feature continuity-check;
          description
            "Generates Continuity Check as per Table 4 of RFC 7276.";
          input {
            leaf technology {
              type identityref {
                base technology-types;
              }
              description "The technology.";
            }
    
            leaf md-name-string {
              type leafref {
                path "/domains/domain/md-name-string";
              }
              mandatory true;
              description
                "Indicate which MD the defect belongs to.";
            }
    
            leaf md-level {
              type leafref {
                path "/domains/domain/md-level";
              }
              description
                "The Maintenance Domain Level.";
            }
    
            leaf ma-name-string {
              type leafref {
                path "/domains/domain/mas/ma/ma-name-string";
              }
              mandatory true;
              description
                "Indicate which MA the defect is associated with.";
            }
    
            uses cos;
    
            uses time-to-live;
    
            leaf sub-type {
              type identityref {
                base command-sub-type;
              }
              description
                "Defines different command types.";
            }
    
            leaf source-mep {
              type leafref {
                path "/domains/domain/mas/ma/mep/mep-name";
              }
              description "Source MEP.";
            }
    
            container destination-mep {
              description "Destination MEP.";
              uses mep-address;
    
              uses mep-id {
                description
                  "Only applicable if the destination is a MEP.";
              }
            }  // container destination-mep
    
            leaf count {
              type uint32;
              default "3";
              description
                "Number of continuity-check messages to be sent.";
            }
    
            leaf cc-transmit-interval {
              type time-interval;
              description
                "Time interval between echo requests.";
            }
    
            leaf packet-size {
              type uint32 {
                range "64..10000";
              }
              description
                "Size of continuity-check packets, in octets.";
            }
          }
    
          output {
            uses monitor-stats {
              description
                "Stats of Continuity Check.";
            }
          }
        }  // rpc continuity-check
    
        rpc continuity-verification {
          if-feature connectivity-verification;
          description
            "Generates Connectivity Verification as per Table 4 in RFC 7276.";
          input {
            leaf md-name-string {
              type leafref {
                path "/domains/domain/md-name-string";
              }
              mandatory true;
              description
                "Indicate which MD the defect belongs to.";
            }
    
            leaf md-level {
              type leafref {
                path "/domains/domain/md-level";
              }
              description
                "The Maintenance Domain Level.";
            }
    
            leaf ma-name-string {
              type leafref {
                path "/domains/domain/mas/ma/ma-name-string";
              }
              mandatory true;
              description
                "Indicate which MA the defect is associated with.";
            }
    
            uses cos;
    
            uses time-to-live;
    
            leaf sub-type {
              type identityref {
                base command-sub-type;
              }
              description
                "Defines different command types.";
            }
    
            leaf source-mep {
              type leafref {
                path "/domains/domain/mas/ma/mep/mep-name";
              }
              description "Source MEP.";
            }
    
            container destination-mep {
              description "Destination MEP.";
              uses mep-address;
    
              uses mep-id {
                description
                  "Only applicable if the destination is a MEP.";
              }
            }  // container destination-mep
    
            leaf count {
              type uint32;
              default "3";
              description
                "Number of continuity-verification messages to be sent.";
            }
    
            leaf interval {
              type time-interval;
              description
                "Time interval between echo requests.";
            }
    
            leaf packet-size {
              type uint32 {
                range "64..10000";
              }
              description
                "Size of continuity-verification packets, in octets.";
            }
          }
    
          output {
            uses monitor-stats {
              description
                "Stats of Continuity Check.";
            }
          }
        }  // rpc continuity-verification
    
        rpc traceroute {
          if-feature traceroute;
          description
            "Generates Traceroute or Path Trace and returns response.
           References RFC 7276 for common Toolset name -- for
           MPLS-TP OAM, it's Route Tracing, and for TRILL OAM, it's
           Path Tracing tool.  Starts with TTL of one and increments
           by one at each hop until the destination is reached or TTL
           reaches max value.";
          input {
            leaf md-name-string {
              type leafref {
                path "/domains/domain/md-name-string";
              }
              mandatory true;
              description
                "Indicate which MD the defect belongs to.";
            }
    
            leaf md-level {
              type leafref {
                path "/domains/domain/md-level";
              }
              description
                "The Maintenance Domain Level.";
            }
    
            leaf ma-name-string {
              type leafref {
                path "/domains/domain/mas/ma/ma-name-string";
              }
              mandatory true;
              description
                "Indicate which MA the defect is associated with.";
            }
    
            uses cos;
    
            uses time-to-live;
    
            leaf command-sub-type {
              type identityref {
                base command-sub-type;
              }
              description
                "Defines different command types.";
            }
    
            leaf source-mep {
              type leafref {
                path "/domains/domain/mas/ma/mep/mep-name";
              }
              description "Source MEP.";
            }
    
            container destination-mep {
              description "Destination MEP.";
              uses mep-address;
    
              uses mep-id {
                description
                  "Only applicable if the destination is a MEP.";
              }
            }  // container destination-mep
    
            leaf count {
              type uint32;
              default "1";
              description
                "Number of traceroute probes to send.  In protocols where a
               separate message is sent at each TTL, this is the number
               of packets to be sent at each TTL.";
            }
    
            leaf interval {
              type time-interval;
              description
                "Time interval between echo requests.";
            }
          }
    
          output {
            list response {
              key "response-index";
              description "List of responses.";
              leaf response-index {
                type uint8;
                description
                  "Arbitrary index for the response.  In protocols that
                 guarantee there is only a single response at each TTL,
                 the TTL can be used as the response index.";
              }
    
              uses time-to-live;
    
              container destination-mep {
                description
                  "MEP from which the response has been received";
                uses mep-address;
    
                uses mep-id {
                  description
                    "Only applicable if the destination is a MEP.";
                }
              }  // container destination-mep
    
              container mip {
                if-feature mip;
                description
                  "MIP responding with traceroute";
                leaf interface {
                  type if:interface-ref;
                  description "MIP interface.";
                }
    
                uses mip-address;
              }  // container mip
    
              uses monitor-stats {
                description
                  "Stats of traceroute.";
              }
            }  // list response
          }
        }  // rpc traceroute
      }  // module ietf-connection-oriented-oam
    

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