module Cisco-IOS-XR-um-ipv6-prefix-list-cfg {

    yang-version 1;

    namespace
      "http://cisco.com/ns/yang/Cisco-IOS-XR-um-ipv6-prefix-list-cfg";

    prefix um-ipv6-prefix-list-cfg;

    import cisco-semver {
      prefix semver;
    }
    import Cisco-IOS-XR-types {
      prefix xr;
    }
    import ietf-inet-types {
      prefix inet;
    }

    organization "Cisco Systems, Inc.";

    contact
      "Cisco Systems, Inc.
     Customer Service
     
     Postal: 170 West Tasman Drive
     San Jose, CA 95134
     
     Tel: +1 800 553-NETS
     
     E-mail: cs-yang@cisco.com";

    description
      "This module contains a collection of YANG definitions
     for Cisco IOS-XR ipv6-prefix-list package configuration.
     
     This YANG module augments the
     modules with configuration data.
     
     Copyright (c) 2019-2020 by Cisco Systems, Inc.
     All rights reserved.";

    revision "2020-12-03" {
      description
        "Limit Remark leaf length.";
    }

    revision "2019-06-10" {
      description
        "Establish semantic version baseline.";
    }

    revision "2019-04-02" {
      description "Initial version";
    }

    semver:module-version "2.0.0";
    semver:module-version "1.0.0";

    container ipv6 {
      description "IPv6 prefix list";
      container prefix-lists {
        description "Prefix list";
        list prefix-list {
          key "prefix-list-name";
          description "prefix list";
          leaf prefix-list-name {
            type xr:Cisco-ios-xr-string {
              length "1..32";
            }
            description
              "Name of a prefix list - maximum 32 characters";
          }

          container sequences {
            description "Sequence number";
            list sequence {
              must
                "(remark and not(permission) and not(prefix) and not(mask) and not(zone) and not(match-prefix-length/ge or match-prefix-length/le or match-prefix-length/eq)) or (not(remark) and permission and prefix and mask)";
              key "sequence-number";
              description "Sequence number";
              leaf sequence-number {
                type uint32 {
                  range "1..2147483646";
                }
                description
                  "Sequence number";
              }

              leaf remark {
                type string {
                  length "0..255";
                }
                description
                  "Comments for prefix list";
              }

              leaf permission {
                type enumeration {
                  enum "deny" {
                    value 0;
                    description
                      "Specify prefixes to reject";
                  }
                  enum "permit" {
                    value 1;
                    description
                      "Specify prefixes to permit";
                  }
                }
                description
                  "specify the type to be either deny (or) permit";
              }

              leaf prefix {
                type inet:ipv6-address-no-zone;
                description
                  "IPv6 address prefix";
              }

              leaf zone {
                type xr:Cisco-ios-xr-string {
                  length "1..32";
                }
                description
                  "IPv6 zone if entered with IPv6 address";
              }

              leaf mask {
                type xr:Ipv6-prefix-length;
                description
                  "Mask length of IPv6 address";
              }

              container match-prefix-length {
                description
                  "Prefix length to be matched";
                leaf eq {
                  type uint32 {
                    range "0..128";
                  }
                  must "not(../ge or ../le)";
                  description
                    "Exact prefix length to be matched";
                }

                leaf ge {
                  type uint32 {
                    range "0..128";
                  }
                  must "not(../eq)";
                  description
                    "Minimum prefix length to be matched";
                }

                leaf le {
                  type uint32 {
                    range "0..128";
                  }
                  must "not(../eq)";
                  description
                    "Maximum prefix length to be matched";
                }
              }  // container match-prefix-length
            }  // list sequence
          }  // container sequences
        }  // list prefix-list
      }  // container prefix-lists
    }  // container ipv6
  }  // module Cisco-IOS-XR-um-ipv6-prefix-list-cfg