path: root/yang/frr-vrrpd.yang

module frr-vrrpd {
  yang-version 1.1;
  namespace "http://frrouting.org/yang/vrrpd";
  prefix frr-vrrpd;

  import ietf-inet-types {
    prefix inet;
  }

  import ietf-yang-types {
    prefix yang;
  }

  import frr-interface {
    prefix frr-interface;
  }

  organization
    "Free Range Routing";
  contact
    "FRR Users List:       <mailto:frog@lists.frrouting.org>
     FRR Development List: <mailto:dev@lists.frrouting.org>";
  description
    "This module defines a model for managing FRR vrrpd daemon.";

  revision 2019-09-09 {
    description
      "Initial revision.";
  }

  grouping ip-vrrp-tracking-config {
    description
      "Configuration data for tracking interfaces
       in a VRRP group";
    leaf-list track-interface {
      type frr-interface:interface-ref;
      description
        "Sets a list of one or more interfaces that should
         be tracked for up/down events to dynamically change the
         priority state of the VRRP group, and potentially
         change the mastership if the tracked interface going
         down lowers the priority sufficiently. Any of the tracked
         interfaces going down will cause the priority to be lowered.
         Some implementations may only support a single
         tracked interface.";
    }

    leaf priority-decrement {
      type uint8 {
        range "0..254";
      }
      default "0";
      description
        "Set the value to subtract from priority when
         the tracked interface goes down";
    }
  }

  grouping ip-vrrp-tracking-state {
    description
      "Operational state data for tracking interfaces in a VRRP
       group";
  }

  grouping ip-vrrp-tracking-top {
    description
      "Top-level grouping for VRRP interface tracking";
    container interface-tracking {
      description
        "Top-level container for VRRP interface tracking";
      container config {
        description
          "Configuration data for VRRP interface tracking";
        uses ip-vrrp-tracking-config;
      }

      container state {
        config false;
        description
          "Operational state data for VRRP interface tracking";
        uses ip-vrrp-tracking-config;

        uses ip-vrrp-tracking-state;
      }
    }
  }

  grouping ip-vrrp-config {
    description
      "Configuration data for VRRP on IP interfaces";
    leaf virtual-router-id {
      type uint8 {
        range "1..255";
      }
      description
        "Set the virtual router id for use by the VRRP group. This
         usually also determines the virtual MAC address that is
         generated for the VRRP group";
    }

    leaf version {
      type enumeration {
        enum "2" {
          value 2;
          description
            "VRRP version 2.";
        }
        enum "3" {
          value 3;
          description
            "VRRP version 3.";
        }
      }
      default "3";
    }

    leaf priority {
      type uint8 {
        range "1..254";
      }
      default "100";
      description
        "Specifies the sending VRRP interface's priority
         for the virtual router. Higher values equal higher
         priority";
    }

    leaf preempt {
      type boolean;
      default "true";
      description
        "When set to true, enables preemption by a higher
         priority backup router of a lower priority master router";
    }

    leaf accept-mode {
      type boolean;
      default "true";
      description
        "Configure whether packets destined for
         virtual addresses are accepted even when the virtual
         address is not owned by the router interface";
    }

    leaf advertisement-interval {
      type uint16 {
        range "1..4095";
      }
      units "centiseconds";
      default "100";
      description
        "Sets the interval between successive VRRP
         advertisements -- RFC 5798 defines this as a 12-bit
         value expressed as 0.1 seconds, with default 100, i.e.,
         1 second. Several implementation express this in units of
         seconds";
    }

    leaf shutdown {
      type boolean;
      default "false";
      description
        "Administrative shutdown for this VRRP group.";
    }
  }

  grouping ip-vrrp-state {
    description
      "Grouping for operational state data for a virtual router";
    leaf current-priority {
      type uint8;
      config false;
      description
        "Operational value of the priority for the
         interface in the VRRP group.";
    }

    leaf vrrp-interface {
      type frr-interface:interface-ref;
      config false;
      description
        "The interface used to transmit VRRP traffic.";
    }

    leaf source-address {
      type inet:ip-address;
      config false;
      description
        "The source IP address used for VRRP advertisements.";
    }

    leaf state {
      type enumeration {
        enum "Initialize" {
          description
            "State when virtual router is waiting for a Startup event.";
        }
        enum "Master" {
          description
            "State when virtual router is functioning as the forwarding router
             for the virtual addresses.";
        }
        enum "Backup" {
          description
            "State when virtual router is monitoring the availability and state
             of the Master router.";
        }
      }
      config false;
    }

    leaf master-advertisement-interval {
      type uint16 {
        range "0..4095";
      }
      config false;
      description
        "Advertisement interval contained in advertisements received from the Master, in milliseconds.";
    }

    leaf skew-time {
      type uint16;
      config false;
      description
        "Time to skew Master_Down_Interval, in milliseconds.";
    }

    container counter {
      config false;
      leaf state-transition {
        type yang:zero-based-counter32;
        description
          "Number of state transitions the virtual router has experienced.";
      }

      container tx {
        leaf advertisement {
          type yang:zero-based-counter32;
          description
            "Number of sent VRRP advertisements.";
        }
      }

      container rx {
        leaf advertisement {
          type yang:zero-based-counter32;
          description
            "Number of received VRRP advertisements.";
        }
      }
    }
  }

  grouping ip-vrrp-top {
    description
      "Top-level grouping for Virtual Router Redundancy Protocol";
    container vrrp {
      description
        "Enclosing container for VRRP groups handled by this
         IP interface";
      reference
        "RFC 5798 - Virtual Router Redundancy Protocol
         (VRRP) Version 3 for IPv4 and IPv6";
      list vrrp-group {
        key "virtual-router-id";
        description
          "List of VRRP groups, keyed by virtual router id";
        uses ip-vrrp-config;

        container v4 {
          leaf-list virtual-address {
            type inet:ipv4-address;
            description
              "Configure one or more IPv4 virtual addresses for the
               VRRP group";
          }

          uses ip-vrrp-state {
            augment "./counter/tx" {
              leaf gratuitous-arp {
                type yang:zero-based-counter32;
                description
                  "Number of sent gratuitous ARP requests.";
              }
            }
          }
        }

        container v6 {
          when "../version = 3";
          leaf-list virtual-address {
            type inet:ipv6-address;
            description
              "Configure one or more IPv6 virtual addresses for the
               VRRP group";
          }

          uses ip-vrrp-state {
            augment "./counter/tx" {
              leaf neighbor-advertisement {
                type yang:zero-based-counter32;
                description
                  "Number of sent unsolicited Neighbor Advertisements.";
              }
            }
          }
        }
      }
    }
  }

  augment "/frr-interface:lib/frr-interface:interface" {
    uses ip-vrrp-top;
  }
}