module BGP4-MIB {

    yang-version 1;

    namespace
      "urn:ietf:params:xml:ns:yang:smiv2:BGP4-MIB";

    prefix BGP4-MIB;

    import ietf-inet-types {
      prefix inet;
    }
    import ietf-yang-smiv2 {
      prefix smiv2;
    }
    import ietf-yang-types {
      prefix yang;
    }

    organization "IETF BGP Working Group";

    contact
      "   John Chu  (Editor)
    Postal: IBM Corp.
            P.O.Box 218
            Yorktown Heights, NY 10598
            US
    
       Tel: +1 914 945 3156
       Fax: +1 914 945 2141
    E-mail: jychu@watson.ibm.com";

    description "The MIB module for BGP-4.";

    revision "1994-05-05" {
      description
        "[Revision added by libsmi due to a LAST-UPDATED clause.]";
    }

    smiv2:alias "bgp" {
      smiv2:oid "1.3.6.1.2.1.15";
    }
    smiv2:alias "bgpTraps" {
      smiv2:oid "1.3.6.1.2.1.15.7";
    }

    container BGP4-MIB {
      config false;
      container bgp {
        smiv2:oid "1.3.6.1.2.1.15";
        leaf bgpVersion {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.15.1";
          type binary {
            length "1..255";
          }
          description
            "Vector of supported BGP protocol version
          numbers.  Each peer negotiates the version
          from this vector.  Versions are identified
          via the string of bits contained within this
          object.  The first octet contains bits 0 to
          7, the second octet contains bits 8 to 15,
          and so on, with the most significant bit
          referring to the lowest bit number in the
          octet (e.g., the MSB of the first octet
          refers to bit 0).  If a bit, i, is present
          and set, then the version (i+1) of the BGP
          is supported.";
        }

        leaf bgpLocalAs {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.15.2";
          type int32 {
            range "0..65535";
          }
          description
            "The local autonomous system number.";
        }

        leaf bgpIdentifier {
          smiv2:max-access "read-only";
          smiv2:oid "1.3.6.1.2.1.15.4";
          type inet:ipv4-address;
          description
            "The BGP Identifier of local system.";
        }
      }  // container bgp

      container bgpPeerTable {
        smiv2:oid "1.3.6.1.2.1.15.3";
        description
          "BGP peer table.  This table contains,
        one entry per BGP peer, information about
        the connections with BGP peers.";
        list bgpPeerEntry {
          smiv2:oid "1.3.6.1.2.1.15.3.1";
          key "bgpPeerRemoteAddr";
          description
            "Entry containing information about the
          connection with a BGP peer.";
          leaf bgpPeerIdentifier {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.1";
            type inet:ipv4-address;
            description
              "The BGP Identifier of this entry's BGP
            peer.";
          }

          leaf bgpPeerState {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.2";
            type enumeration {
              enum "idle" {
                value 1;
              }
              enum "connect" {
                value 2;
              }
              enum "active" {
                value 3;
              }
              enum "opensent" {
                value 4;
              }
              enum "openconfirm" {
                value 5;
              }
              enum "established" {
                value 6;
              }
            }
            description
              "The BGP peer connection state.";
          }

          leaf bgpPeerAdminStatus {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.15.3.1.3";
            type enumeration {
              enum "stop" {
                value 1;
              }
              enum "start" {
                value 2;
              }
            }
            description
              "The desired state of the BGP connection.
            A transition from 'stop' to 'start' will
            cause the BGP Start Event to be generated.
            A transition from 'start' to 'stop' will
            cause the BGP Stop Event to be generated.
            This parameter can be used to restart BGP
            peer connections.  Care should be used in
            providing write access to this object
            without adequate authentication.";
          }

          leaf bgpPeerNegotiatedVersion {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.4";
            type int32;
            description
              "The negotiated version of BGP running
            between the two peers.";
          }

          leaf bgpPeerLocalAddr {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.5";
            type inet:ipv4-address;
            description
              "The local IP address of this entry's BGP
            connection.";
          }

          leaf bgpPeerLocalPort {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.6";
            type int32 {
              range "0..65535";
            }
            description
              "The local port for the TCP connection
            between the BGP peers.";
          }

          leaf bgpPeerRemoteAddr {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.7";
            type inet:ipv4-address;
            description
              "The remote IP address of this entry's BGP
            peer.";
          }

          leaf bgpPeerRemotePort {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.8";
            type int32 {
              range "0..65535";
            }
            description
              "The remote port for the TCP connection
            between the BGP peers.  Note that the
            objects bgpPeerLocalAddr,
            bgpPeerLocalPort, bgpPeerRemoteAddr and
            bgpPeerRemotePort provide the appropriate
            reference to the standard MIB TCP
            connection table.";
          }

          leaf bgpPeerRemoteAs {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.9";
            type int32 {
              range "0..65535";
            }
            description
              "The remote autonomous system number.";
          }

          leaf bgpPeerInUpdates {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.10";
            type yang:counter32;
            description
              "The number of BGP UPDATE messages
            received on this connection.  This object
            should be initialized to zero (0) when the
            connection is established.";
          }

          leaf bgpPeerOutUpdates {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.11";
            type yang:counter32;
            description
              "The number of BGP UPDATE messages
            transmitted on this connection.  This
            object should be initialized to zero (0)
            when the connection is established.";
          }

          leaf bgpPeerInTotalMessages {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.12";
            type yang:counter32;
            description
              "The total number of messages received
            from the remote peer on this connection.
            This object should be initialized to zero
            when the connection is established.";
          }

          leaf bgpPeerOutTotalMessages {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.13";
            type yang:counter32;
            description
              "The total number of messages transmitted to
            the remote peer on this connection.  This
            object should be initialized to zero when
            the connection is established.";
          }

          leaf bgpPeerLastError {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.14";
            type binary {
              length "2";
            }
            description
              "The last error code and subcode seen by this
            peer on this connection.  If no error has
            occurred, this field is zero.  Otherwise, the
            first byte of this two byte OCTET STRING
            contains the error code, and the second byte
            contains the subcode.";
          }

          leaf bgpPeerFsmEstablishedTransitions {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.15";
            type yang:counter32;
            description
              "The total number of times the BGP FSM
            transitioned into the established state.";
          }

          leaf bgpPeerFsmEstablishedTime {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.16";
            type yang:gauge32;
            description
              "This timer indicates how long (in
            seconds) this peer has been in the
            Established state or how long
            since this peer was last in the
            Established state.  It is set to zero when
            a new peer is configured or the router is
            booted.";
          }

          leaf bgpPeerConnectRetryInterval {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.15.3.1.17";
            type int32 {
              range "1..65535";
            }
            description
              "Time interval in seconds for the
            ConnectRetry timer.  The suggested value
            for this timer is 120 seconds.";
          }

          leaf bgpPeerHoldTime {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.18";
            type int32 {
              range "0|3..65535";
            }
            description
              "Time interval in seconds for the Hold
            Timer established with the peer.  The
            value of this object is calculated by this
            BGP speaker by using the smaller of the
            value in bgpPeerHoldTimeConfigured and the
            Hold Time received in the OPEN message.
            This value must be at lease three seconds
            if it is not zero (0) in which case the
            Hold Timer has not been established with
            the peer, or, the value of
            bgpPeerHoldTimeConfigured is zero (0).";
          }

          leaf bgpPeerKeepAlive {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.19";
            type int32 {
              range "0..21845";
            }
            description
              "Time interval in seconds for the KeepAlive
            timer established with the peer.  The value
            of this object is calculated by this BGP
            speaker such that, when compared with
            bgpPeerHoldTime, it has the same
            proportion as what
            bgpPeerKeepAliveConfigured has when
            compared with bgpPeerHoldTimeConfigured.
            If the value of this object is zero (0),
            it indicates that the KeepAlive timer has
            not been established with the peer, or,
            the value of bgpPeerKeepAliveConfigured is
            zero (0).";
          }

          leaf bgpPeerHoldTimeConfigured {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.15.3.1.20";
            type int32 {
              range "0|3..65535";
            }
            description
              "Time interval in seconds for the Hold Time
            configured for this BGP speaker with this
            peer.  This value is placed in an OPEN
            message sent to this peer by this BGP
            speaker, and is compared with the Hold
            Time field in an OPEN message received
            from the peer when determining the Hold
            Time (bgpPeerHoldTime) with the peer.
            This value must not be less than three
            seconds if it is not zero (0) in which
            case the Hold Time is NOT to be
            established with the peer.  The suggested
            value for this timer is 90 seconds.";
          }

          leaf bgpPeerKeepAliveConfigured {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.15.3.1.21";
            type int32 {
              range "0..21845";
            }
            description
              "Time interval in seconds for the
            KeepAlive timer configured for this BGP
            speaker with this peer.  The value of this
            object will only determine the
            KEEPALIVE messages' frequency relative to
            the value specified in
            bgpPeerHoldTimeConfigured; the actual
            time interval for the KEEPALIVE messages
            is indicated by bgpPeerKeepAlive.  A
            reasonable maximum value for this timer
            would be configured to be one
            third of that of
            bgpPeerHoldTimeConfigured.
            If the value of this object is zero (0),
            no periodical KEEPALIVE messages are sent
            to the peer after the BGP connection has
            been established.  The suggested value for
            this timer is 30 seconds.";
          }

          leaf bgpPeerMinASOriginationInterval {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.15.3.1.22";
            type int32 {
              range "1..65535";
            }
            description
              "Time interval in seconds for the
            MinASOriginationInterval timer.
            The suggested value for this timer is 15
            seconds.";
          }

          leaf bgpPeerMinRouteAdvertisementInterval {
            smiv2:max-access "read-write";
            smiv2:oid "1.3.6.1.2.1.15.3.1.23";
            type int32 {
              range "1..65535";
            }
            description
              "Time interval in seconds for the
            MinRouteAdvertisementInterval timer.
            The suggested value for this timer is 30
            seconds.";
          }

          leaf bgpPeerInUpdateElapsedTime {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.3.1.24";
            type yang:gauge32;
            description
              "Elapsed time in seconds since the last BGP
            UPDATE message was received from the peer.
            Each time bgpPeerInUpdates is incremented,
            the value of this object is set to zero
            (0).";
          }
        }  // list bgpPeerEntry
      }  // container bgpPeerTable

      container bgpRcvdPathAttrTable {
        smiv2:oid "1.3.6.1.2.1.15.5";
        status obsolete;
        description
          "The BGP Received Path Attribute Table
        contains information about paths to
        destination networks received from all
        peers running BGP version 3 or less.";
        list bgpPathAttrEntry {
          smiv2:oid "1.3.6.1.2.1.15.5.1";
          key "bgpPathAttrDestNetwork bgpPathAttrPeer";
          status obsolete;
          description
            "Information about a path to a network.";
          leaf bgpPathAttrPeer {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.5.1.1";
            type inet:ipv4-address;
            status obsolete;
            description
              "The IP address of the peer where the path
            information was learned.";
          }

          leaf bgpPathAttrDestNetwork {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.5.1.2";
            type inet:ipv4-address;
            status obsolete;
            description
              "The address of the destination network.";
          }

          leaf bgpPathAttrOrigin {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.5.1.3";
            type enumeration {
              enum "igp" {
                value 1;
              }
              enum "egp" {
                value 2;
              }
              enum "incomplete" {
                value 3;
              }
            }
            status obsolete;
            description
              "The ultimate origin of the path information.";
          }

          leaf bgpPathAttrASPath {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.5.1.4";
            type binary {
              length "2..255";
            }
            status obsolete;
            description
              "The set of ASs that must be traversed to
            reach the network.  This object is
            probably best represented as SEQUENCE OF
            INTEGER.  For SMI compatibility, though,
            it is represented as OCTET STRING.  Each
            AS is represented as a pair of octets
            according to the following algorithm:
            
                first-byte-of-pair = ASNumber / 256;
                second-byte-of-pair = ASNumber & 255;";
          }

          leaf bgpPathAttrNextHop {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.5.1.5";
            type inet:ipv4-address;
            status obsolete;
            description
              "The address of the border router that
            should be used for the destination
            network.";
          }

          leaf bgpPathAttrInterASMetric {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.5.1.6";
            type int32;
            status obsolete;
            description
              "The optional inter-AS metric.  If this
            attribute has not been provided for this
            route, the value for this object is 0.";
          }
        }  // list bgpPathAttrEntry
      }  // container bgpRcvdPathAttrTable

      container bgp4PathAttrTable {
        smiv2:oid "1.3.6.1.2.1.15.6";
        description
          "The BGP-4 Received Path Attribute Table
        contains information about paths to
        destination networks received from all
        BGP4 peers.";
        list bgp4PathAttrEntry {
          smiv2:oid "1.3.6.1.2.1.15.6.1";
          key "bgp4PathAttrIpAddrPrefix bgp4PathAttrIpAddrPrefixLen bgp4PathAttrPeer";
          description
            "Information about a path to a network.";
          leaf bgp4PathAttrPeer {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.1";
            type inet:ipv4-address;
            description
              "The IP address of the peer where the path
            information was learned.";
          }

          leaf bgp4PathAttrIpAddrPrefixLen {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.2";
            type int32 {
              range "0..32";
            }
            description
              "Length in bits of the IP address prefix
            in the Network Layer Reachability
            Information field.";
          }

          leaf bgp4PathAttrIpAddrPrefix {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.3";
            type inet:ipv4-address;
            description
              "An IP address prefix in the Network Layer
            Reachability Information field.  This object
            is an IP address containing the prefix with
            length specified by
            bgp4PathAttrIpAddrPrefixLen.
            Any bits beyond the length specified by
            bgp4PathAttrIpAddrPrefixLen are zeroed.";
          }

          leaf bgp4PathAttrOrigin {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.4";
            type enumeration {
              enum "igp" {
                value 1;
              }
              enum "egp" {
                value 2;
              }
              enum "incomplete" {
                value 3;
              }
            }
            description
              "The ultimate origin of the path
            information.";
          }

          leaf bgp4PathAttrASPathSegment {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.5";
            type binary {
              length "2..255";
            }
            description
              "The sequence of AS path segments.  Each AS
            path segment is represented by a triple
            <type, length, value>.
            
            The type is a 1-octet field which has two
            possible values:
                 1      AS_SET: unordered set of ASs a
                             route in the UPDATE
                             message has traversed
                 2      AS_SEQUENCE: ordered set of ASs
                             a route in the UPDATE
                             message has traversed.
            
            The length is a 1-octet field containing the
            number of ASs in the value field.
            
            The value field contains one or more AS
            numbers, each AS is represented in the octet
            string as a pair of octets according to the
            following algorithm:
            
                first-byte-of-pair = ASNumber / 256;
                second-byte-of-pair = ASNumber & 255;";
          }

          leaf bgp4PathAttrNextHop {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.6";
            type inet:ipv4-address;
            description
              "The address of the border router that
            should be used for the destination
            network.";
          }

          leaf bgp4PathAttrMultiExitDisc {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.7";
            type int32 {
              range "-1..2147483647";
            }
            description
              "This metric is used to discriminate
            between multiple exit points to an
            adjacent autonomous system.  A value of -1
            indicates the absence of this attribute.";
          }

          leaf bgp4PathAttrLocalPref {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.8";
            type int32 {
              range "-1..2147483647";
            }
            description
              "The originating BGP4 speaker's degree of
            preference for an advertised route.  A
            value of -1 indicates the absence of this
            attribute.";
          }

          leaf bgp4PathAttrAtomicAggregate {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.9";
            type enumeration {
              enum
                "lessSpecificRrouteNotSelected" {
                value 1;
              }
              enum
                "lessSpecificRouteSelected" {
                value 2;
              }
            }
            description
              "Whether or not the local system has
            selected a less specific route without
            selecting a more specific route.";
          }

          leaf bgp4PathAttrAggregatorAS {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.10";
            type int32 {
              range "0..65535";
            }
            description
              "The AS number of the last BGP4 speaker that
            performed route aggregation.  A value of
            zero (0) indicates the absence of this
            attribute.";
          }

          leaf bgp4PathAttrAggregatorAddr {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.11";
            type inet:ipv4-address;
            description
              "The IP address of the last BGP4 speaker
            that performed route aggregation.  A value
            of 0.0.0.0 indicates the absence of this
            attribute.";
          }

          leaf bgp4PathAttrCalcLocalPref {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.12";
            type int32 {
              range "-1..2147483647";
            }
            description
              "The degree of preference calculated by the
            receiving BGP4 speaker for an advertised
            route.  A value of -1 indicates the
            absence of this attribute.";
          }

          leaf bgp4PathAttrBest {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.13";
            type enumeration {
              enum "false" {
                value 1;
              }
              enum "true" {
                value 2;
              }
            }
            description
              "An indication of whether or not this route
            was chosen as the best BGP4 route.";
          }

          leaf bgp4PathAttrUnknown {
            smiv2:max-access "read-only";
            smiv2:oid "1.3.6.1.2.1.15.6.1.14";
            type binary {
              length "0..255";
            }
            description
              "One or more path attributes not understood
            by this BGP4 speaker.  Size zero (0)
            indicates the absence of such
            attribute(s).  Octets beyond the maximum
            size, if any, are not recorded by this
            object.";
          }
        }  // list bgp4PathAttrEntry
      }  // container bgp4PathAttrTable
    }  // container BGP4-MIB

    notification bgpEstablished {
      smiv2:oid "1.3.6.1.2.1.15.7.1";
      description
        "The BGP Established event is generated when
      the BGP FSM enters the ESTABLISHED state.";
      container object-1 {
        leaf bgpPeerRemoteAddr {
          type leafref {
            path "/BGP4-MIB:BGP4-MIB/BGP4-MIB:bgpPeerTable/BGP4-MIB:bgpPeerEntry/BGP4-MIB:bgpPeerRemoteAddr";
          }
        }

        leaf bgpPeerLastError {
          type leafref {
            path "/BGP4-MIB:BGP4-MIB/BGP4-MIB:bgpPeerTable/BGP4-MIB:bgpPeerEntry/BGP4-MIB:bgpPeerLastError";
          }
        }
      }  // container object-1

      container object-2 {
        leaf bgpPeerRemoteAddr {
          type leafref {
            path "/BGP4-MIB:BGP4-MIB/BGP4-MIB:bgpPeerTable/BGP4-MIB:bgpPeerEntry/BGP4-MIB:bgpPeerRemoteAddr";
          }
        }

        leaf bgpPeerState {
          type leafref {
            path "/BGP4-MIB:BGP4-MIB/BGP4-MIB:bgpPeerTable/BGP4-MIB:bgpPeerEntry/BGP4-MIB:bgpPeerState";
          }
        }
      }  // container object-2
    }  // notification bgpEstablished

    notification bgpBackwardTransition {
      smiv2:oid "1.3.6.1.2.1.15.7.2";
      description
        "The BGPBackwardTransition Event is generated
      when the BGP FSM moves from a higher numbered
      state to a lower numbered state.";
      container object-1 {
        leaf bgpPeerRemoteAddr {
          type leafref {
            path "/BGP4-MIB:BGP4-MIB/BGP4-MIB:bgpPeerTable/BGP4-MIB:bgpPeerEntry/BGP4-MIB:bgpPeerRemoteAddr";
          }
        }

        leaf bgpPeerLastError {
          type leafref {
            path "/BGP4-MIB:BGP4-MIB/BGP4-MIB:bgpPeerTable/BGP4-MIB:bgpPeerEntry/BGP4-MIB:bgpPeerLastError";
          }
        }
      }  // container object-1

      container object-2 {
        leaf bgpPeerRemoteAddr {
          type leafref {
            path "/BGP4-MIB:BGP4-MIB/BGP4-MIB:bgpPeerTable/BGP4-MIB:bgpPeerEntry/BGP4-MIB:bgpPeerRemoteAddr";
          }
        }

        leaf bgpPeerState {
          type leafref {
            path "/BGP4-MIB:BGP4-MIB/BGP4-MIB:bgpPeerTable/BGP4-MIB:bgpPeerEntry/BGP4-MIB:bgpPeerState";
          }
        }
      }  // container object-2
    }  // notification bgpBackwardTransition
  }  // module BGP4-MIB