module openconfig-system {

    yang-version 1;

    namespace
      "http://openconfig.net/yang/system";

    prefix oc-sys;

    import openconfig-inet-types {
      prefix oc-inet;
    }
    import openconfig-yang-types {
      prefix oc-yang;
    }
    import openconfig-types {
      prefix oc-types;
    }
    import openconfig-extensions {
      prefix oc-ext;
    }
    import openconfig-aaa {
      prefix oc-aaa;
    }
    import openconfig-system-logging {
      prefix oc-log;
    }
    import openconfig-system-terminal {
      prefix oc-sys-term;
    }
    import openconfig-procmon {
      prefix oc-proc;
    }
    import openconfig-platform {
      prefix oc-platform;
    }
    import openconfig-alarms {
      prefix oc-alarms;
    }
    import openconfig-messages {
      prefix oc-messages;
    }
    import openconfig-license {
      prefix oc-license;
    }
    import openconfig-network-instance {
      prefix oc-ni;
    }

    organization "OpenConfig working group";

    contact
      "OpenConfig working group
netopenconfig@googlegroups.com";

    description
      "Model for managing system-wide services and functions on
network devices.

Portions of this code were derived from IETF RFC 7317.
Please reproduce this note if possible.

IETF code is subject to the following copyright and license:
Copyright (c) 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).";

    revision "2023-12-20" {
      description
        "Change NTP offset, root-delay, and root-dispersion to int64 nanoseconds,
and update their descriptions for accuracy and clarity.";
      reference
        "2.0.0";

    }

    revision "2023-10-26" {
      description
        "Add up-time leaf and promote module to version 1.0.";
      reference
        "1.0.0";

    }

    revision "2023-06-16" {
      description
        "Reordered imports to be alphabetical.";
      reference
        "0.17.1";

    }

    revision "2022-12-20" {
      description
        "Added network instance leaf to ntp client, and dropped
ntp-source-address from global to individual config. Removed ntp prefix.";
      reference
        "0.17.0";

    }

    revision "2022-12-19" {
      description
        "Update last configuration timestamp documentation.";
      reference
        "0.16.1";

    }

    revision "2022-09-28" {
      description
        "Add last configuration timestamp leaf.";
      reference
        "0.16.0";

    }

    revision "2022-07-25" {
      description
        "Add system software version.";
      reference
        "0.15.0";

    }

    revision "2022-07-20" {
      description
        "Added routing-mac system MAC address.";
      reference
        "0.14.0";

    }

    revision "2022-07-12" {
      description
        "Modify ntp enabled description to reflect true and false case.";
      reference
        "0.13.1";

    }

    revision "2021-07-20" {
      description
        "Adding list of mount points.";
      reference
        "0.13.0";

    }

    revision "2021-07-14" {
      description
        "Support for additional RAM usage counters.";
      reference
        "0.12.0";

    }

    revision "2021-06-28" {
      description
        "Adding system memory error counters.";
      reference
        "0.11.1";

    }

    revision "2021-06-16" {
      description
        "Remove trailing whitespace";
      reference
        "0.10.1";

    }

    revision "2020-04-13" {
      description
        "Remove the existing grpc-service, and add a new list
of the gRPC servers in a new module.";
      reference
        "0.10.0";

    }

    revision "2020-03-25" {
      description
        "Fix typo in description statement for ipv4-address
list.";
      reference
        "0.9.1";

    }

    revision "2020-01-07" {
      description
        "Add import of license management model.";
      reference
        "0.9.0";

    }

    revision "2019-03-15" {
      description
        "Update boot time to be nanoseconds since epoch.";
      reference
        "0.8.0";

    }

    revision "2019-01-29" {
      description
        "Add messages module to the system model";
      reference
        "0.7.0";

    }

    revision "2018-11-21" {
      description
        "Add OpenConfig module metadata extensions.";
      reference
        "0.6.1";

    }

    revision "2018-07-17" {
      description "Add gRPC server data";
      reference
        "0.6.0";

    }

    revision "2018-01-21" {
      description "Add cpu utilization data";
      reference
        "0.5.0";

    }

    revision "2017-12-15" {
      description
        "Add alarms to the system model";
      reference
        "0.4.0";

    }

    revision "2017-09-18" {
      description
        "Updated to use OpenConfig types modules";
      reference
        "0.3.0";

    }

    revision "2017-07-06" {
      description
        "Move to oc-inet types, add IETF attribution, add RADIUS
counters, changed password leaf names to indicate hashed";
      reference
        "0.2.0";

    }

    revision "2017-01-29" {
      description "Initial public release";
      reference
        "0.1.0";

    }

    oc-ext:openconfig-version "2.0.0";
    oc-ext:regexp-posix;
    oc-ext:catalog-organization "openconfig";
    oc-ext:origin "openconfig";

    identity NTP_AUTH_TYPE {
      description
        "Base identity for encryption schemes supported for NTP
authentication keys";
    }

    identity NTP_AUTH_MD5 {
      base NTP_AUTH_TYPE;
      description "MD5 encryption method";
    }

    typedef timezone-name-type {
      type string;
      description
        "A time zone name as used by the Time Zone Database,
sometimes referred to as the 'Olson Database'.

The exact set of valid values is an implementation-specific
matter.  Client discovery of the exact set of time zone names
for a particular server is out of scope.";
      reference
        "BCP 175: Procedures for Maintaining the Time Zone Database";

    }

    grouping system-clock-config {
      description
        "Configuration data for system-wide clock configuration";
      leaf timezone-name {
        type timezone-name-type;
        description
          "The TZ database name to use for the system, such
as 'Europe/Stockholm'.";
        reference
          "IANA Time Zone Database
          http://www.iana.org/time-zones";

      }
    }  // grouping system-clock-config

    grouping system-clock-state {
      description
        "Operational state data for system-wide clock configuration";
    }  // grouping system-clock-state

    grouping system-clock-top {
      description
        "Top-level grouping for system-wide clock configuration";
      container clock {
        description
          "Top-level container for clock configuration data";
        container config {
          description
            "Configuration data for system clock";
          uses system-clock-config;
        }  // container config

        container state {
          config false;
          description
            "Operational state data for system clock";
          uses system-clock-config;

          uses system-clock-state;
        }  // container state
      }  // container clock
    }  // grouping system-clock-top

    grouping system-global-config {
      description
        "system-wide configuration parameters";
      leaf hostname {
        type oc-inet:domain-name;
        description
          "The hostname of the device -- should be a single domain
label, without the domain.";
      }

      leaf domain-name {
        type oc-inet:domain-name;
        description
          "Specifies the domain name used to form fully qualified name
for unqualified hostnames.";
      }

      leaf login-banner {
        type string;
        description
          "The console login message displayed before the login prompt,
i.e., before a user logs into the system.";
      }

      leaf motd-banner {
        type string;
        description
          "The console message displayed after a user logs into the
system.  They system may append additional standard
information such as the current system date and time, uptime,
last login timestamp, etc.";
      }
    }  // grouping system-global-config

    grouping mount-point-state {
      description
        "Operational state data for the mount point.";
      leaf name {
        type string;
        description "Mount point name.";
      }

      leaf storage-component {
        type leafref {
          path
            "/oc-platform:components/oc-platform:component/oc-platform:name";
        }
        description
          "In the case that the filesystem that is mounted corresponds to a
physical or logical component within the system, this leaf provides
a reference to the hosting component within the /components
hierarchy.

The reference should be to the most specific component (e.g., if an
entry for /dev/sda1 exists, then this should be referred to,
otherwise a reference to /dev/sda may be provided.";
      }

      leaf size {
        type uint64;
        units "megabytes";
        description
          "The total size of the initialised filesystem.";
      }

      leaf available {
        type uint64;
        units "megabytes";
        description
          "The amount of unused space on the filesystem.";
      }

      leaf utilized {
        type uint64;
        units "megabytes";
        description
          "The amount of space currently in use on the filesystem.";
      }
    }  // grouping mount-point-state

    grouping system-global-state {
      description
        "Global operational state data for the system";
      leaf current-datetime {
        type oc-yang:date-and-time;
        description
          "The current system date and time.";
      }

      leaf up-time {
        type oc-types:timeticks64;
        units "nanoseconds";
        description
          "The amount of time since the network operating system was
initialized.";
      }

      leaf boot-time {
        type oc-types:timeticks64;
        units "nanoseconds";
        description
          "This timestamp indicates the time that the system was last
restarted.  The value is the timestamp in nanoseconds relative
to the Unix Epoch (Jan 1, 1970 00:00:00 UTC).";
      }

      leaf software-version {
        type string;
        description
          "Operating system version of the currently active controller
of the device.  It is required that this value matches the
value of the state/software-version leaf in the component
of type OPERATING_SYSTEM.";
      }

      leaf last-configuration-timestamp {
        type oc-types:timeticks64;
        units "nanoseconds";
        description
          "Indicates the monotonically increasing timestamp at which the
last configuration change was made. This may may be through CLI,
gNMI or some other mechanism. The value is the timestamp in
nanoseconds relative to the Unix Epoch (Jan 1, 1970 00:00:00 UTC).";
      }
    }  // grouping system-global-state

    grouping mount-points-top {
      description
        "Top-level grouping for mount points data.";
      container mount-points {
        config false;
        description
          "When a system has a set of filesystems that are attached to a
directory (i.e., mounted on the system) they are expected to be
present in this list. If the system has the concept of mounting
physical or virtual resources to a mount point within the root
filesystem (/) they should also be included in this list.";
        list mount-point {
          key "name";
          description
            "List of mount points in the system.";
          leaf name {
            type leafref {
              path "../state/name";
            }
            description
              "Reference to the key for list of mount points.";
          }

          container state {
            config false;
            description
              "State of system mount point.";
            uses mount-point-state;
          }  // container state
        }  // list mount-point
      }  // container mount-points
    }  // grouping mount-points-top

    grouping system-dns-config {
      description
        "DNS / resolver related configuration data";
      leaf-list search {
        type oc-inet:domain-name;
        ordered-by user;
        description
          "An ordered list of domains to search when resolving
a host name.";
      }
    }  // grouping system-dns-config

    grouping system-dns-state {
      description
        "Operational state data for system DNS resolver";
    }  // grouping system-dns-state

    grouping system-dns-servers-config {
      description
        "Configuration data for DNS resolvers";
      leaf address {
        type oc-inet:ip-address;
        description
          "The address of the DNS server, can be either IPv4
or IPv6.";
      }

      leaf port {
        type oc-inet:port-number;
        default "53";
        description
          "The port number of the DNS server.";
      }
    }  // grouping system-dns-servers-config

    grouping system-dns-static-config {
      description
        "Configuration data for static host entries";
      leaf hostname {
        type string;
        description
          "Hostname for the static DNS entry";
      }

      leaf-list alias {
        type string;
        description
          "Additional aliases for the hostname";
      }

      leaf-list ipv4-address {
        type oc-inet:ipv4-address;
        description
          "List of IPv4 addresses for the host entry";
      }

      leaf-list ipv6-address {
        type oc-inet:ipv6-address;
        description
          "List of IPv6 addresses for the host entry";
      }
    }  // grouping system-dns-static-config

    grouping system-dns-static-state {
      description
        "Operational state data for static host entries";
    }  // grouping system-dns-static-state

    grouping system-dns-static-top {
      description
        "Top-level grouping for static DNS host entries";
      container host-entries {
        description
          "Enclosing container for list of static host entries";
        list host-entry {
          key "hostname";
          description
            "List of static host entries";
          leaf hostname {
            type leafref {
              path "../config/hostname";
            }
            description
              "Reference to the hostname list key";
          }

          container config {
            description
              "Configuration data for static host entries";
            uses system-dns-static-config;
          }  // container config

          container state {
            config false;
            description
              "Operational state data for static host entries";
            uses system-dns-static-config;

            uses system-dns-static-state;
          }  // container state
        }  // list host-entry
      }  // container host-entries
    }  // grouping system-dns-static-top

    grouping system-dns-servers-state {
      description
        "Operational state data for DNS resolvers";
    }  // grouping system-dns-servers-state

    grouping system-dns-servers-top {
      description
        "Top-level grouping for the list of DNS resolvers.";
      container servers {
        description
          "Enclosing container for DNS resolver list";
        list server {
          key "address";
          ordered-by user;
          description
            "List of the DNS servers that the resolver should query.

When the resolver is invoked by a calling application, it
sends the query to the first name server in this list.  If
no response has been received within 'timeout' seconds,
the resolver continues with the next server in the list.
If no response is received from any server, the resolver
continues with the first server again.  When the resolver
has traversed the list 'attempts' times without receiving
any response, it gives up and returns an error to the
calling application.

Implementations MAY limit the number of entries in this
list.";
          leaf address {
            type leafref {
              path "../config/address";
            }
            description
              "References the configured address of the DNS server";
          }

          container config {
            description
              "Configuration data for each DNS resolver";
            uses system-dns-servers-config;
          }  // container config

          container state {
            config false;
            description
              "Operational state data for each DNS resolver";
            uses system-dns-servers-config;

            uses system-dns-servers-state;
          }  // container state
        }  // list server
      }  // container servers
    }  // grouping system-dns-servers-top

    grouping system-dns-top {
      description
        "Top-level grouping for DNS / resolver config and operational
state data";
      container dns {
        description
          "Enclosing container for DNS resolver data";
        container config {
          description
            "Configuration data for the DNS resolver";
          uses system-dns-config;
        }  // container config

        container state {
          config false;
          description
            "Operational state data for the DNS resolver";
          uses system-dns-config;

          uses system-dns-state;
        }  // container state

        uses system-dns-servers-top;

        uses system-dns-static-top;
      }  // container dns
    }  // grouping system-dns-top

    grouping system-ntp-server-config {
      description
        "Configuration data for NTP servers";
      leaf address {
        type oc-inet:host;
        description
          "The address or hostname of the NTP server.";
      }

      leaf port {
        type oc-inet:port-number;
        default "123";
        description
          "The port number of the NTP server.";
      }

      leaf version {
        type uint8 {
          range "1..4";
        }
        default "4";
        description
          "Version number to put in outgoing NTP packets";
      }

      leaf association-type {
        type enumeration {
          enum "SERVER" {
            value 0;
            description
              "Use client association mode.  This device
will not provide synchronization to the
configured NTP server.";
          }
          enum "PEER" {
            value 1;
            description
              "Use symmetric active association mode.
This device may provide synchronization
to the configured NTP server.";
          }
          enum "POOL" {
            value 2;
            description
              "Use client association mode with one or
more of the NTP servers found by DNS
resolution of the domain name given by
the 'address' leaf.  This device will not
provide synchronization to the servers.";
          }
        }
        default "SERVER";
        description
          "The desired association type for this NTP server.";
      }

      leaf iburst {
        type boolean;
        default "false";
        description
          "Indicates whether this server should enable burst
synchronization or not.";
      }

      leaf prefer {
        type boolean;
        default "false";
        description
          "Indicates whether this server should be preferred
or not.";
      }

      leaf network-instance {
        type oc-ni:network-instance-ref;
        description
          "The network instance used to find this server.";
      }

      leaf source-address {
        type oc-inet:ip-address;
        description
          "Source address to use on outgoing NTP packets";
      }
    }  // grouping system-ntp-server-config

    grouping system-ntp-server-state {
      description
        "Operational state data for NTP servers";
      leaf stratum {
        type uint8;
        description
          "Indicates the level of the server in the NTP hierarchy. As
stratum number increases, the accuracy is degraded.  Primary
servers are stratum while a maximum value of 16 indicates
unsynchronized.  The values have the following specific
semantics:

| 0      | unspecified or invalid
| 1      | primary server (e.g., equipped with a GPS receiver)
| 2-15   | secondary server (via NTP)
| 16     | unsynchronized
| 17-255 | reserved";
        reference
          "RFC 5905 - Network Time Protocol Version 4: Protocol and
          Algorithms Specification";

      }

      leaf root-delay {
        type int64;
        units "nanoseconds";
        description
          "The total round-trip delay to the reference clock, in nanoseconds.";
        reference
          "RFC 5905 - Network Time Protocol Version 4: Protocol and
          Algorithms Specification, Section 7.3";

      }

      leaf root-dispersion {
        type int64;
        units "nanoseconds";
        description
          "The maximum error inherent in the measurement, accumulated over the
stratum levels from the reference clock.";
        reference
          "RFC 5905 - Network Time Protocol Version 4: Protocol and
          Algorithms Specification, Section 4";

      }

      leaf offset {
        type int64;
        units "nanoseconds";
        description
          "Estimate of the current time offset from the peer.  This is
the time difference of the peer's clock minus the local clock.";
        reference
          "RFC 5905 - Network Time Protocol Version 4: Protocol and
          Algorithms Specification, Section 8";

      }

      leaf poll-interval {
        type uint32;
        units "seconds";
        description
          "Polling interval of the peer";
      }
    }  // grouping system-ntp-server-state

    grouping system-ntp-server-top {
      description
        "Top-level grouping for the list of NTP servers";
      container servers {
        description
          "Enclosing container for the list of NTP servers";
        list server {
          key "address";
          description
            "List of NTP servers to use for system clock
synchronization.  If '/system/ntp/enabled'
is 'true', then the system will attempt to
contact and utilize the specified NTP servers.";
          leaf address {
            type leafref {
              path "../config/address";
            }
            description
              "References the configured address or hostname of the
NTP server.";
          }

          container config {
            description
              "Configuration data for an NTP server.";
            uses system-ntp-server-config;
          }  // container config

          container state {
            config false;
            description
              "Operational state data for an NTP server.";
            uses system-ntp-server-config;

            uses system-ntp-server-state;
          }  // container state
        }  // list server
      }  // container servers
    }  // grouping system-ntp-server-top

    grouping system-ntp-auth-keys-config {
      description "Configuration data ";
      leaf key-id {
        type uint16;
        description
          "Integer identifier used by the client and server to
designate a secret key.  The client and server must use
the same key id.";
      }

      leaf key-type {
        type identityref {
          base NTP_AUTH_TYPE;
        }
        description
          "Encryption type used for the NTP authentication key";
      }

      leaf key-value {
        type string;
        description
          "NTP authentication key value";
      }
    }  // grouping system-ntp-auth-keys-config

    grouping system-ntp-auth-keys-state {
      description
        "Operational state data for NTP auth key data";
    }  // grouping system-ntp-auth-keys-state

    grouping system-ntp-auth-keys-top {
      description
        "Top-level grouping for NTP auth key data";
      container ntp-keys {
        description
          "Enclosing container for list of NTP authentication keys";
        list ntp-key {
          key "key-id";
          description
            "List of NTP authentication keys";
          leaf key-id {
            type leafref {
              path "../config/key-id";
            }
            description
              "Reference to auth key-id list key";
          }

          container config {
            description
              "Configuration data for NTP auth keys";
            uses system-ntp-auth-keys-config;
          }  // container config

          container state {
            config false;
            description
              "Operational state data for NTP auth keys";
            uses system-ntp-auth-keys-config;

            uses system-ntp-auth-keys-state;
          }  // container state
        }  // list ntp-key
      }  // container ntp-keys
    }  // grouping system-ntp-auth-keys-top

    grouping system-ntp-config {
      description
        "Configuration data for system-wide NTP operation.";
      leaf enabled {
        type boolean;
        default "false";
        description
          "Enables and disables the NTP protocol and indicates that the system should
attempt to synchronize the system clock with an NTP server
from the servers defined in the 'ntp/server' list.";
      }

      leaf enable-ntp-auth {
        type boolean;
        default "false";
        description
          "Enable or disable NTP authentication -- when enabled, the
system will only use packets containing a trusted
authentication key to synchronize the time.";
      }
    }  // grouping system-ntp-config

    grouping system-ntp-state {
      description
        "Operational state data for system-wide NTP operation.";
      leaf auth-mismatch {
        type oc-yang:counter64;
        description
          "Count of the number of NTP packets received that were not
processed due to authentication mismatch.";
      }
    }  // grouping system-ntp-state

    grouping system-ntp-top {
      description
        "Top-level grouping for configuration and state data for NTP";
      container ntp {
        description
          "Top-level container for NTP configuration and state";
        container config {
          description
            "Configuration data for NTP client.";
          uses system-ntp-config;
        }  // container config

        container state {
          config false;
          description
            "Operational state data for NTP services.";
          uses system-ntp-config;

          uses system-ntp-state;
        }  // container state

        uses system-ntp-auth-keys-top;

        uses system-ntp-server-top;
      }  // container ntp
    }  // grouping system-ntp-top

    grouping system-routing-macaddr-config {
      description
        "Configuration data for system's routing MAC addresses.";
      leaf routing-mac {
        type oc-yang:mac-address;
        description
          "Any packets destined to this MAC address must be sent through the
routing pipeline by the system. This MAC address is used to identify
routed packets in addition to any other MAC addresses that the system
may already have been using to perform routing.

It is not expected that this MAC address will be used as the
source MAC address of any routed packet, as the source MAC address of
any packets generated by the system, or a MAC address used in ARP
response. This MAC address may not be allocated from the block of
MAC address that system owns. For instance, it's allocation could
be managed by an external controller.";
      }
    }  // grouping system-routing-macaddr-config

    grouping system-macaddr-top {
      description
        "Top-level grouping for configuration and state of system's MAC addresses.";
      container mac-address {
        description
          "Top-level container for system's MAC address configuration and state";
        container config {
          description
            "Configuration data for routing MAC address.";
          uses system-routing-macaddr-config;
        }  // container config

        container state {
          config false;
          description
            "Operational state data for routing MAC address.";
          uses system-routing-macaddr-config;
        }  // container state
      }  // container mac-address
    }  // grouping system-macaddr-top

    grouping system-memory-config {
      description
        "Configuration data for system memory";
    }  // grouping system-memory-config

    grouping system-memory-state {
      description
        "Operational state data for system memory";
      leaf physical {
        type uint64;
        units "bytes";
        description
          "Reports the total physical memory available on the
system.";
      }

      leaf reserved {
        type uint64;
        units "bytes";
        description
          "Memory reserved for system use";
      }

      leaf used {
        type uint64;
        units "bytes";
        description
          "Memory that has been used and not available for allocation.";
      }

      leaf free {
        type uint64;
        units "bytes";
        description
          "Memory that is not used and is available for allocation.";
      }
    }  // grouping system-memory-state

    grouping system-memory-error-counters {
      description
        "Counters for system memory errors.";
      leaf correctable-ecc-errors {
        type uint64;
        description
          "Count of correctable ECC errors. Systems with ECC memory
are capable of correcting Single-bit ECC errors.";
      }

      leaf uncorrectable-ecc-errors {
        type uint64;
        description
          "Count of uncorrectable ECC errors. Systems with ECC
memory are capable of detecting multi-bit ECC errors,
but cannot correct them.";
      }

      leaf total-ecc-errors {
        type uint64;
        description
          "Count of total ECC errors, this includes both correctable
and uncorrectable ECC errors.";
      }
    }  // grouping system-memory-error-counters

    grouping system-memory-top {
      description
        "Top-level grouping for system memory data definitions";
      container memory {
        description
          "Top-level container for system memory data";
        container config {
          description
            "Configuration data for system memory";
          uses system-memory-config;
        }  // container config

        container state {
          config false;
          description
            "Operational state data for system memory";
          container counters {
            description
              "Counters for tracking system memory errors";
            uses system-memory-error-counters;
          }  // container counters

          uses system-memory-config;

          uses system-memory-state;
        }  // container state
      }  // container memory
    }  // grouping system-memory-top

    grouping system-cpu-state {
      description
        "Operational state data for the system CPU(s)";
      leaf index {
        type union {
          type enumeration {
            enum "ALL" {
              value 0;
              description
                "Index value indicating all CPUs in the system";
            }
          }
          type uint32;
        }
        description
          "The CPU index for each processor core on the system.  On a
single-core system, the index should be zero.  The ALL
index signifies an aggregation of the CPU utilization
statistics over all cores in the system.";
      }

      container total {
        description "Total CPU utilization.";
        uses oc-types:avg-min-max-instant-stats-pct;
      }  // container total

      container user {
        description
          "Percentage of CPU time spent running in user space.";
        uses oc-types:avg-min-max-instant-stats-pct;
      }  // container user

      container kernel {
        description
          "Percentage of CPU time spent running in kernel space.";
        uses oc-types:avg-min-max-instant-stats-pct;
      }  // container kernel

      container nice {
        description
          "Percentage of CPU time spent running low-priority (niced)
user processes.";
        uses oc-types:avg-min-max-instant-stats-pct;
      }  // container nice

      container idle {
        description
          "Percentage of CPU time spent idle.";
        uses oc-types:avg-min-max-instant-stats-pct;
      }  // container idle

      container wait {
        description
          "Percentage of CPU time spent waiting for I/O.";
        uses oc-types:avg-min-max-instant-stats-pct;
      }  // container wait

      container hardware-interrupt {
        description
          "Percentage of CPU time spent servicing hardware interrupts.";
        uses oc-types:avg-min-max-instant-stats-pct;
      }  // container hardware-interrupt

      container software-interrupt {
        description
          "Percentage of CPU time spent servicing software interrupts";
        uses oc-types:avg-min-max-instant-stats-pct;
      }  // container software-interrupt
    }  // grouping system-cpu-state

    grouping system-cpu-top {
      description
        "Top-level grouping for system CPU data";
      container cpus {
        config false;
        description
          "Enclosing container for the list of CPU cores on the
system";
        list cpu {
          key "index";
          description
            "List of CPU cores on the system (including logical CPUs
on hyperthreaded systems), keyed by either a numerical
index, or the ALL value for an entry representing the
aggregation across all CPUs.";
          leaf index {
            type leafref {
              path "../state/index";
            }
            description
              "Reference to list key";
          }

          container state {
            description
              "Operational state data for the system CPU(s)";
            uses system-cpu-state;
          }  // container state
        }  // list cpu
      }  // container cpus
    }  // grouping system-cpu-top

    grouping system-top {
      description
        "Top level system data containers";
      container system {
        description
          "Enclosing container for system-related configuration and
operational state data";
        container config {
          description
            "Global configuration data for the system";
          uses system-global-config;
        }  // container config

        container state {
          config false;
          description
            "Global operational state data for the system";
          uses system-global-config;

          uses system-global-state;
        }  // container state

        uses mount-points-top;

        uses oc-aaa:aaa-top;

        uses oc-alarms:alarms-top;

        uses oc-log:logging-top;

        uses oc-proc:procmon-processes-top;

        uses oc-messages:messages-top;

        uses oc-license:license-top;

        uses oc-sys-term:system-ssh-server-top;

        uses oc-sys-term:system-telnet-server-top;

        uses system-clock-top;

        uses system-cpu-top;

        uses system-dns-top;

        uses system-macaddr-top;

        uses system-memory-top;

        uses system-ntp-top;
      }  // container system
    }  // grouping system-top

    uses system-top;
  }  // module openconfig-system