module huawei-pp6 {

    yang-version 1;

    namespace "urn:huawei:yang:huawei-pp6";

    prefix pp6;

    import huawei-ifm {
      prefix ifm;
    }
    import huawei-ip {
      prefix ip;
    }
    import huawei-extension {
      prefix ext;
    }
    import huawei-network-instance {
      prefix ni;
    }
    import ietf-inet-types {
      prefix inet;
    }
    import huawei-l3vpn {
      prefix l3vpn;
    }

    organization
      "Huawei Technologies Co., Ltd.";

    contact
      "Huawei Industrial Base
     Bantian, Longgang
     Shenzhen 518129
     People's Republic of China
     Website: http://www.huawei.com
     Email: support@huawei.com";

    description
      "IPv6 related configurations.";

    revision "2020-03-16" {
      description "Modify Icmp6Source.";
      reference
        "Huawei private.";

    }

    revision "2019-12-30" {
      description "Init revision.";
      reference
        "Huawei private.";

    }

    ext:task-name "ip-stack";

    typedef extension-header-type {
      type enumeration {
        enum "fragment" {
          value 44;
          description
            "IPv6 fragment extension header.";
        }
        enum "esp" {
          value 50;
          description
            "IPv6 encapsulating security payload extension header.";
        }
        enum "ah" {
          value 51;
          description
            "IPv6 authentication extension header.";
        }
      }
      description
        "Description of extension header type.";
    }

    typedef filter-rule-type {
      type enumeration {
        enum "deny" {
          value 0;
          description
            "Deny process specified IPv6 extension header packets.";
        }
        enum "permit" {
          value 1;
          description
            "Permit process specified IPv6 extension header.";
        }
      }
      description
        "Description of filter-rule-type.";
    }

    typedef options-all-flag-type {
      type enumeration {
        enum "false" {
          value 0;
          description
            "Not all options of an IPv6 extension header.";
        }
        enum "true" {
          value 1;
          description
            "All options of an IPv6 extension header.";
        }
      }
      description
        "Description of options all flag type.";
    }

    typedef icmp-pkt-type {
      type enumeration {
        enum "port-unreachable" {
          value 1;
          description
            "Indicates that the packet type is port unreachable error packet.";
        }
        enum "hoplimit-exceeded" {
          value 2;
          description
            "Indicates that the packet type is hoplimit exceeded error packet.";
        }
        enum "all-tracert" {
          value 3;
          description
            "Indicates that the packet type is hoplimit exceeded and port unreachable error packet.";
        }
      }
      description
        "Description of icmpv6 error packet type.";
    }

    typedef fragment-flag-type {
      type enumeration {
        enum "no" {
          value 0;
          description
            "Clear IPv6 path MTU fragment flag.";
        }
        enum "yes" {
          value 1;
          description
            "Set IPv6 path MTU fragment flag.";
        }
      }
      description
        "Description of fragment flag type.";
    }

    typedef pmtu-type {
      type enumeration {
        enum "static" {
          value 0;
          description
            "Static IPv6 path MTU entry.";
        }
        enum "dynamic" {
          value 1;
          description
            "Dynamic IPv6 path MTU entry.";
        }
      }
      description
        "Description of IPv6 path MTU type, static or dynamic.";
    }

    typedef switch-type {
      type enumeration {
        enum "allow" {
          value 0;
          description
            "Allow packets to pass.";
        }
        enum "deny" {
          value 1;
          description
            "Reject packets to pass.";
        }
      }
      description
        "Description of switch type.";
    }

    typedef send-or-receive-type {
      type enumeration {
        enum "send" {
          value 0;
          description "Packet sending.";
        }
        enum "receive" {
          value 1;
          description "Packet reception.";
        }
      }
      description
        "Description of packet action.";
    }

    typedef icmp6-name-type {
      type enumeration {
        enum "network-unreachable" {
          value 1;
          description
            "Type = 1, Code = 0. Not in the range of all-famous-receive-switch.";
        }
        enum "host-unreachable" {
          value 2;
          description
            "Type = 1, Code = 3. Not in the range of all-famous-receive-switch.";
        }
        enum "port-unreachable" {
          value 3;
          description "Type = 1, Code = 4.";
        }
        enum "packet-too-big" {
          value 4;
          description "Type = 2, Code = 0.";
        }
        enum "hop-limit-exceeded" {
          value 5;
          description "Type = 3, Code = 0.";
        }
        enum "echo" {
          value 6;
          description
            "Type = 128, Code = 0.";
        }
        enum "echo-reply" {
          value 7;
          description
            "Type = 129, Code = 0.";
        }
        enum "router-solicitation" {
          value 8;
          description
            "Type = 133, Code = 0.";
        }
        enum "router-advertisement" {
          value 9;
          description
            "Type = 134, Code = 0.";
        }
        enum "neighbor-solicitation" {
          value 10;
          description
            "Type = 135, Code = 0.";
        }
        enum "neighbor-advertisement" {
          value 11;
          description
            "Type = 136, Code = 0.";
        }
        enum "redirect" {
          value 12;
          description
            "Type = 137, Code = 0. Not in the range of all-famous-receive-switch.";
        }
        enum "multicast-listener-query" {
          value 13;
          description
            "Type = 130, code = 0.";
        }
        enum "multicast-listener-report" {
          value 14;
          description
            "Type = 131, code = 0.";
        }
        enum "multicast-listener-done" {
          value 15;
          description
            "Type = 132, code = 0.";
        }
        enum "multicast-listener-report-v2" {
          value 16;
          description
            "Type = 143, code = 0.";
        }
        enum "un-famous" {
          value 17;
          description
            "The ICMPv6 type that is not in the range of all-famous-send-switch, nor in the range of all-famous-receive-switch.";
        }
      }
      description
        "Description of ICMPv6 name type.";
    }

    typedef multicast-echo-config-type {
      type enumeration {
        enum "allow" {
          value 1;
          description
            "Multicast ping request packets will be processed on the interface.";
        }
        enum "deny" {
          value 2;
          description
            "Multicast ping request packets will not be processed on the interface.";
        }
      }
      description
        "Whether to process the multicast ping request packets on the interface.";
    }

    container pp6 {
      description
        "IPv6 related configurations.";
      container ipv6-global {
        description
          "Configure global PP6 attribute configuration.";
        leaf bucket-size {
          type uint32 {
            range "1..200";
          }
          default "10";
          description
            "Number of ICMPv6 token buckets.";
        }

        leaf interval {
          type uint32 {
            range "0..2147483647";
          }
          units "ms";
          default "100";
          description
            "ICMPv6 interval for sending a specified number of ICMPv6 token buckets.";
        }

        leaf echo-reply {
          type boolean;
          status deprecated;
          description
            "Enable/disable sending enabling of echo reply packets.";
        }

        leaf host-unreach {
          type boolean;
          status deprecated;
          description
            "Enable/disable host-unreachable error.";
        }

        leaf port-unreach {
          type boolean;
          status deprecated;
          description
            "Enable/disable port-unreachable error.";
        }

        leaf timeout {
          type uint32 {
            range "10..100";
          }
          units "min";
          default "10";
          description "Path-mtu lifecycle.";
        }

        leaf black-list-flag {
          type boolean;
          default "false";
          description
            "Enable/disable the function enabled IPv6 blacklist packet permit.";
        }

        leaf too-big-limit-flag {
          type boolean;
          default "true";
          description
            "Enable/disable the function enabled toobig packet process rate limit.";
        }

        leaf permit-incomplete-fragment {
          type boolean;
          default "false";
          description
            "Enable/disable global flag of allowing first fragment with incomplete IPv6 header chain.";
        }

        leaf reassemble-timeout {
          type uint32 {
            range "5..120";
          }
          units "s";
          default "60";
          description
            "The timeout for the split packets reorganization.";
        }

        leaf multicast-echo-receive {
          type switch-type;
          default "allow";
          description
            "Indicates whether to process the multicast ping request packets.";
        }

        leaf source-ingress-interface {
          type boolean;
          default "false";
          description
            "Enable/disable source selection for the incoming interface of ttl-exceeded packets.";
        }
      }  // container ipv6-global

      container icmp6-pkt-switch {
        description
          "Configure the ICMPv6 packet sending and receiving switch. All-famous is enabled by default. When matching, a single type of configuration is preferred, followed by an all-famous configuration.";
        leaf all-famous-send-switch {
          type switch-type;
          default "allow";
          description
            "Switches for all famous send types. But, the configuration in node each-type-switch will be used first, if it exists. Refer to the definition in type icmp6-name-type for the scope of all-famous send types.";
        }

        leaf all-famous-receive-switch {
          type switch-type;
          default "allow";
          description
            "Switches for all famous receive types. But, the configuration in node each-type-switch will be used first, if it exists. Refer to the definition in type icmp6-name-type for the scope of all-famous receive types.";
        }

        container each-type-switchs {
          description
            "List of switches of a single ICMPv6 type.";
          list each-type-switch {
            key "type code send-or-receive";
            description
              "Configure switch for single ICMPv6 type list.";
            leaf type {
              type uint32 {
                range "0..255";
              }
              description "The ICMPv6 type.";
            }

            leaf code {
              type uint32 {
                range "0..255";
              }
              description "The ICMPv6 code.";
            }

            leaf send-or-receive {
              type send-or-receive-type;
              description
                "Packet reception or packet sending.";
            }

            leaf switch {
              type switch-type;
              mandatory true;
              description
                "Switch for this ICMPv6 types.";
            }

            leaf name {
              type icmp6-name-type;
              config false;
              description
                "The name of ICMPv6 type.";
            }
          }  // list each-type-switch
        }  // container each-type-switchs
      }  // container icmp6-pkt-switch

      container extension-header-filter-globals {
        description
          "Configure global IPv6 extension header filter configurations.";
        container hop-by-hop-switch {
          description
            "Configure the IPv6 packet with hop-by-hop options extension header switch.";
          leaf all-options {
            type filter-rule-type;
            description
              "All options of IPv6 extension header switch.";
          }

          container options {
            description
              "List of some options of IPv6 extension header switch.";
            list option {
              key "option-code";
              description
                "Configure some options of IPv6 extension header switch.";
              leaf option-code {
                type uint8 {
                  range "0..255";
                }
                description
                  "Option code of IPv6 extension header.";
              }

              leaf filter-rule {
                ext:support-filter "true";
                type filter-rule-type;
                mandatory true;
                description
                  "Filter policy of IPv6 packet.";
              }
            }  // list option
          }  // container options
        }  // container hop-by-hop-switch

        container routing-switch {
          description
            "Configure the IPv6 packet with routing options extension header switch.";
          leaf all-options {
            type filter-rule-type;
            description
              "All options of IPv6 extension header switch.";
          }

          container options {
            description
              "List of some options of IPv6 extension header switch.";
            list option {
              key "option-code";
              description
                "Configure some options of IPv6 extension header switch.";
              leaf option-code {
                type uint8 {
                  range "0..255";
                }
                description
                  "Option code of IPv6 extension header.";
              }

              leaf filter-rule {
                ext:support-filter "true";
                type filter-rule-type;
                mandatory true;
                description
                  "Filter policy of IPv6 packet.";
              }
            }  // list option
          }  // container options
        }  // container routing-switch

        container destination-switch {
          description
            "Configure the IPv6 packet with destination options extension header switch.";
          leaf all-options {
            type filter-rule-type;
            description
              "All options of IPv6 extension header switch.";
          }

          container options {
            description
              "List of some options of IPv6 extension header switch.";
            list option {
              key "option-code";
              description
                "Configure some options of IPv6 extension header switch.";
              leaf option-code {
                type uint8 {
                  range "0..255";
                }
                description
                  "Option code of IPv6 extension header.";
              }

              leaf filter-rule {
                ext:support-filter "true";
                type filter-rule-type;
                mandatory true;
                description
                  "Filter policy of IPv6 packet.";
              }
            }  // list option
          }  // container options
        }  // container destination-switch

        container no-option-exh-switchs {
          description
            "List of the IPv6 packet with no options extension header switches.";
          list no-option-exh-switch {
            key "exh-type";
            description
              "Configure the IPv6 packet with no options extension header switches.";
            leaf exh-type {
              type extension-header-type;
              description
                "IPv6 extension header type which have no option.";
            }

            leaf filter-rule {
              ext:support-filter "true";
              type filter-rule-type;
              mandatory true;
              description
                "Filter policy of IPv6 packet.";
            }
          }  // list no-option-exh-switch
        }  // container no-option-exh-switchs
      }  // container extension-header-filter-globals

      container ipv6-stat {
        config false;
        description
          "Statistics of querying for the statistics on IPv6 packets.";
        leaf total-snd {
          type uint32;
          config false;
          description
            "Total count of sent packets.";
        }

        leaf local-snd {
          type uint32;
          config false;
          description
            "Count of packets that are sent out locally.";
        }

        leaf forwd-snd {
          type uint32;
          config false;
          description
            "Count of forwarded packets.";
        }

        leaf rawpkt-snd {
          type uint32;
          config false;
          description
            "Count of sent Raw packets.";
        }

        leaf discard-snd {
          type uint32;
          config false;
          description
            "Count of discarded packets due to the limit of sending rate.";
        }

        leaf fragmented {
          type uint32;
          config false;
          description
            "Count of sent fragmented packets.";
        }

        leaf fragment-snd {
          type uint32;
          config false;
          description
            "Count of sent packet fragments.";
        }

        leaf fragment-fail {
          type uint32;
          config false;
          description
            "Count of packet fragments that fail to be sent.";
        }

        leaf multi-snd {
          type uint32;
          config false;
          description
            "Count of sent multicast packets.";
        }

        leaf total-rcv {
          type uint32;
          config false;
          description
            "Total count of received packets.";
        }

        leaf local-rcv {
          type uint32;
          config false;
          description
            "Count of packets that are received locally.";
        }

        leaf hop-exceed-rcv {
          type uint32;
          config false;
          description
            "Count of received packets whose number of hops exceeds the upper limit.";
        }

        leaf head-err-rcv {
          type uint32;
          config false;
          description
            "Count of packets whose headers are incorrect.";
        }

        leaf too-big-rcv {
          type uint32;
          config false;
          description
            "Count of received oversized packets.";
        }

        leaf routfail-rcv {
          type uint32;
          config false;
          description
            "Count of received packets whose routes are unreachable.";
        }

        leaf addrerr-rcv {
          type uint32;
          config false;
          description
            "Count of received packets with incorrect addresses.";
        }

        leaf protoerr-rcv {
          type uint32;
          config false;
          description
            "Count of received packets whose protocols are incorrect.";
        }

        leaf truncated-rcv {
          type uint32;
          config false;
          description
            "Count of received truncated packets.";
        }

        leaf opterr-rcv {
          type uint32;
          config false;
          description
            "Count of received packets whose options are incorrect.";
        }

        leaf frags-rcv {
          type uint32;
          config false;
          description
            "Count of received packet fragments.";
        }

        leaf reassed-rcv {
          type uint32;
          config false;
          description
            "Count of received packets that are reassembled.";
        }

        leaf reass-timeout-rcv {
          type uint32;
          config false;
          description
            "Count of received packets whose reassembling is timeout.";
        }

        leaf multi-rcv {
          type uint32;
          config false;
          description
            "Count of received multicast packets.";
        }

        leaf hop-by-hop-option {
          type uint32;
          config false;
          description
            "Count of received packets whose extension headers are Hop-by-Hop options.";
        }

        leaf mobility-option {
          type uint32;
          config false;
          description
            "Count of received packets whose extension headers are mobility header.";
        }

        leaf dest-option {
          type uint32;
          config false;
          description
            "Count of received packets whose extension headers are destination options.";
        }

        leaf routing-option {
          type uint32;
          config false;
          description
            "Count of received packets whose extension headers are routing header.";
        }

        leaf fragment-option {
          type uint32;
          config false;
          description
            "Count of received packets whose extension headers are fragment header.";
        }

        leaf auth-option {
          type uint32;
          config false;
          description
            "Count of received packets whose extension headers are authentication header.";
        }

        leaf encap-option {
          type uint32;
          config false;
          description
            "Count of received packets whose extension headers are encapsulation header.";
        }

        leaf no-header {
          type uint32;
          config false;
          description
            "Count of received packets without any packet header after extension headers.";
        }

        leaf tlv-length-error {
          type uint32;
          config false;
          description
            "Count of received packets whose options length are incorrect.";
        }

        leaf opt-length-error {
          type uint32;
          config false;
          description
            "Count of received packets whose extension headers length are incorrect.";
        }

        leaf opt-unknown {
          type uint32;
          config false;
          description
            "Count of received packets whose extension headers type are incorrect.";
        }

        leaf type-unknown {
          type uint32;
          config false;
          description
            "Count of received packets whose options type are incorrect.";
        }

        leaf hbh-option-filter {
          type uint32;
          config false;
          description
            "Count of filtered packets whose extension headers are Hop-by-Hop options.";
        }

        leaf dest-option-filter {
          type uint32;
          config false;
          description
            "Count of filtered packets whose extension headers are destination options.";
        }

        leaf rout-option-filter {
          type uint32;
          config false;
          description
            "Count of filtered packets whose extension headers are routing header.";
        }

        leaf frag-option-filter {
          type uint32;
          config false;
          description
            "Count of filtered packets whose extension headers are fragment header.";
        }

        leaf ah-option-filter {
          type uint32;
          config false;
          description
            "Count of filtered packets whose extension headers are authentication header.";
        }

        leaf esp-option-filter {
          type uint32;
          config false;
          description
            "Count of filtered packets whose extension headers are encapsulation header.";
        }
      }  // container ipv6-stat

      container icmp6-stat {
        config false;
        description
          "Statistics of querying for the statistics on ICMPv6 packets.";
        leaf total-sent {
          type uint32;
          config false;
          description
            "Total count of sent packets.";
        }

        leaf unreach-sent {
          type uint32;
          config false;
          description
            "Count of sent unreachable packets.";
        }

        leaf prohibit-sent {
          type uint32;
          config false;
          description
            "Count of sent prohibit packets.";
        }

        leaf hoplimit-sent {
          type uint32;
          config false;
          description
            "Count of sent hoplimit packets.";
        }

        leaf para-pro-sent {
          type uint32;
          config false;
          description
            "Count of sent parameter error packets.";
        }

        leaf too-big-sent {
          type uint32;
          config false;
          description
            "Count of sent too big packets.";
        }

        leaf echo-sent {
          type uint32;
          config false;
          description
            "Count of sent echo packets.";
        }

        leaf echo-reply-sent {
          type uint32;
          config false;
          description
            "Count of sent echo reply packets.";
        }

        leaf rs-sent {
          type uint32;
          config false;
          description
            "Count of sent RS packets.";
        }

        leaf ra-sent {
          type uint32;
          config false;
          description
            "Count of sent RA packets.";
        }

        leaf ns-sent {
          type uint32;
          config false;
          description
            "Count of sent NS packets.";
        }

        leaf na-sent {
          type uint32;
          config false;
          description
            "Count of sent NA packets.";
        }

        leaf redirect-sent {
          type uint32;
          config false;
          description
            "Count of sent redirect packets.";
        }

        leaf rate-limit-sent {
          type uint32;
          config false;
          description
            "Count of sent rate limit packets.";
        }

        leaf total-rcv {
          type uint32;
          config false;
          description
            "Count of total receive packets.";
        }

        leaf format-err-rcv {
          type uint32;
          config false;
          description
            "Count of receive format error packets.";
        }

        leaf checksum-err-rcv {
          type uint32;
          config false;
          description
            "Count of receive checksum error packets.";
        }

        leaf tooshort-rcv {
          type uint32;
          config false;
          description
            "Count of receive too short packets.";
        }

        leaf bad-code-rcv {
          type uint32;
          config false;
          description
            "Count of receive bad code packets.";
        }

        leaf bad-length-rcv {
          type uint32;
          config false;
          description
            "Count of receive bad length packets.";
        }

        leaf unknown-info-rcv {
          type uint32;
          config false;
          description
            "Count of receive unknown info packets.";
        }

        leaf unknown-err-rcv {
          type uint32;
          config false;
          description
            "Count of receive unknown error packets.";
        }

        leaf unreachable-rcv {
          type uint32;
          config false;
          description
            "Count of receive unreachable packets.";
        }

        leaf prohibit-rcv {
          type uint32;
          config false;
          description
            "Count of managed restricted unreachable ICMPv6 packets received.";
        }

        leaf hop-exceed-rcv {
          type uint32;
          config false;
          description
            "Count of received packets whose number of hops exceeds the upper limit.";
        }

        leaf para-pro-rcv {
          type uint32;
          config false;
          description
            "Count of received ICMPv6 message packets is incorrect.";
        }

        leaf too-big-rcv {
          type uint32;
          config false;
          description
            "Count of ICMPv6 messages received in oversized messages.";
        }

        leaf echo-rcv {
          type uint32;
          config false;
          description
            "Count of ICMPv6 request packets received.";
        }

        leaf echo-reply-rcv {
          type uint32;
          config false;
          description
            "Count of received ICMPv6 response packets.";
        }

        leaf rs-rcv {
          type uint32;
          config false;
          description
            "Count of received RS messages.";
        }

        leaf ra-rcv {
          type uint32;
          config false;
          description
            "Count of received RA messages.";
        }

        leaf ns-rcv {
          type uint32;
          config false;
          description
            "Count of received NS messages.";
        }

        leaf na-rcv {
          type uint32;
          config false;
          description
            "Count of received NA messages.";
        }

        leaf redirect-rcv {
          type uint32;
          config false;
          description
            "Count of redirect packets received.";
        }

        leaf rate-limit-rcv {
          type uint32;
          config false;
          description
            "Count of unreceived packets due to ICMPv6 error handling rate limit.";
        }

        leaf echo-reject {
          type uint32;
          config false;
          description
            "Count of ICMPv6 echo packets discarded due to switch shutdown.";
        }

        leaf echoreply-reject {
          type uint32;
          config false;
          description
            "Count of ICMPv6 echoreply packets discarded due to switch shutdown.";
        }

        leaf hop-exceed-reject {
          type uint32;
          config false;
          description
            "Count of ICMPv6 exceed hop-limit packets discarded due to switch shutdown.";
        }

        leaf port-unreach-reject {
          type uint32;
          config false;
          description
            "Count of ICMPv6 messages port unreachable discarded due to the switch shutdown.";
        }

        leaf too-big-reject {
          type uint32;
          config false;
          description
            "Count of ICMPv6 messages oversized packets discarded due to switch shutdown.";
        }

        leaf ns-reject {
          type uint32;
          config false;
          description
            "Count of NS packets discarded due to switch shutdown.";
        }

        leaf na-reject {
          type uint32;
          config false;
          description
            "Count of NA packets discarded due to switch shutdown.";
        }

        leaf rs-reject {
          type uint32;
          config false;
          description
            "Count of RS packets discarded due to switch shutdown.";
        }

        leaf ra-reject {
          type uint32;
          config false;
          description
            "Count of RA packets discarded due to switch shutdown.";
        }

        leaf redirect-reject {
          type uint32;
          config false;
          description
            "Count of redirect packets discarded due to switch shutdown.";
        }

        leaf host-unreachable-reject {
          type uint32;
          config false;
          description
            "Count of host unreachable ICMPv6 packets discarded due to switch shutdown.";
        }

        leaf net-unreachable-reject {
          type uint32;
          config false;
          description
            "Count of net unreachable ICMPv6 packets discarded due to switch shutdown.";
        }

        leaf fragment-timeout-reject {
          type uint32;
          config false;
          description
            "Count of fragment timeout ICMPv6 packets discarded due to switch shutdown.";
        }

        leaf error-head-reject {
          type uint32;
          config false;
          description
            "Count of error head ICMPv6 packets discarded due to switch shutdown.";
        }

        leaf hostadmin-prohibit-reject {
          type uint32;
          config false;
          description
            "Count of hostadmin prohibit ICMPv6 packets discarded due to switch shutdown.";
        }

        leaf unkonwn-ipv6opt-reject {
          type uint32;
          config false;
          description
            "Count of unkonwn IPv6 option ICMPv6 packets discarded due to switch shutdown.";
        }

        leaf unknown-nexthead-reject {
          type uint32;
          config false;
          description
            "Count of unknown next-header ICMPv6 packets discarded due to switch shutdown.";
        }

        leaf other-reject {
          type uint32;
          config false;
          description
            "Count of other ICMPv6 packets discarded due to switch shutdown.";
        }

        leaf multicast-echo-reject {
          type uint32;
          config false;
          description
            "Count of ICMPv6 packets discarded due to echo multicast switch shutdown.";
        }
      }  // container icmp6-stat

      container ipv6-pmtus {
        description
          "Configure IPv6 path MTU and statistics of IPv6 path MTU entries which can be static, or dynamic.";
        container ipv6-pmtu-statics {
          description
            "List of static IPv6 path MTU entry configurations.";
          list ipv6-pmtu-static {
            key "destination-address vrf-name";
            description
              "Configure static IPv6 path MTU entry.";
            leaf destination-address {
              type inet:ipv6-address-no-zone;
              description
                "Destination IPv6 address, excluding IPv6 loopback interface address, IPv6 local link address, IPv6 unspecified address, IPv6 multicast address, and IPv6 map address.";
            }

            leaf vrf-name {
              type leafref {
                path "/ni:network-instance/ni:instances/ni:instance/ni:name";
              }
              must
                "/ni:network-instance/ni:instances/ni:instance[ni:name=current()]/l3vpn:afs/l3vpn:af[l3vpn:type='ipv6-unicast']";
              description "VPN name.";
            }

            leaf mtu {
              type uint32 {
                range "1280..10000";
              }
              units "Byte";
              default "1500";
              description
                "IPv6 path MTU value.";
            }
          }  // list ipv6-pmtu-static
        }  // container ipv6-pmtu-statics

        container ipv6-pmtu-states {
          config false;
          description
            "List of information about IPv6 path MTU entry query.";
          list ipv6-pmtu-state {
            key "destination-address vrf-name";
            description
              "Statistics of IPv6 path MTU entries which can be static, or dynamic.";
            leaf destination-address {
              type inet:ipv6-address-no-zone;
              description
                "Destination IPv6 address, excluding IPv6 loopback interface address, IPv6 local link address, IPv6 unspecified address, IPv6 multicast address, and IPv6 map address.";
            }

            leaf vrf-name {
              type leafref {
                path "/ni:network-instance/ni:instances/ni:instance/ni:name";
              }
              description "VPN name.";
            }

            leaf mtu {
              type uint32;
              units "Byte";
              description
                "IPv6 path MTU value.";
            }

            leaf life-time {
              type uint32;
              units "min";
              description
                "Remaining lifetime of a dynamic PMTU entry.";
            }

            leaf mtu-type {
              ext:support-filter "true";
              type pmtu-type;
              description
                "Static type or dynamic type.";
            }

            leaf fragment-flag {
              type fragment-flag-type;
              description
                "Fragmentation flag, packets are fragmented or not fragmented.";
            }
          }  // list ipv6-pmtu-state
        }  // container ipv6-pmtu-states
      }  // container ipv6-pmtus
    }  // container pp6

    rpc ipv6-pmtu-clear {
      ext:node-ref "/pp6:pp6/pp6:ipv6-pmtu-states";
      description
        "Clearance of IPv6 path MTU based on VPN names.";
      input {
        leaf vrf-name {
          type leafref {
            path "/ni:network-instance/ni:instances/ni:instance/ni:name";
          }
          description
            "Clearance of IPv6 path MTU Dynamic statistics based on VPN names.";
        }
      }
    }  // rpc ipv6-pmtu-clear

    augment /ifm:ifm/ifm:interfaces/ifm:interface/ip:ipv6 {
      when
        "../ifm:type!='ServiceIf' and ../ifm:type!='Virtual-if'";
      description
        "All configurations of the PP6 under the interface.";
      container pp6-collection {
        description
          "Configure PP6 interface attribute configurations.";
        leaf permit-incomplete-fragment {
          type boolean;
          description
            "Enable/disable flag of allowing first fragment with incomplete IPv6 header chain in IPv6 enabled interfaces.";
        }
      }  // container pp6-collection

      container pp6-security {
        description
          "Configure the interface IPv6 security configurations.";
        leaf multicast-echo-receive {
          when
            "../../../ifm:type!='NULL' and ../../../ifm:type!='ServiceIf' and ../../../ifm:type!='Virtual-if' and "
              + "../../../ifm:type!='Cpos' and ../../../ifm:type!='Cpos-Trunk' and ../../../ifm:type!='Atm-Bundle' and "
              + "../../../ifm:type!='Serial' and ../../../ifm:type!='Trunk-Serial' and ../../../ifm:type!='Global-Mp-Group' and "
              + "../../../ifm:type!='Gmpls-Uni' and ../../../ifm:type!='HP-GE'";
          type multicast-echo-config-type;
          description
            "Indicates whether to process the multicast ping request packets.";
        }
      }  // container pp6-security

      container extension-header-filter {
        when
          "../../ifm:type!='NULL' and ../../ifm:type!='ServiceIf' and ../../ifm:type!='Virtual-if' and "
            + "../../ifm:type!='Cpos' and ../../ifm:type!='Cpos-Trunk' and ../../ifm:type!='Atm-Bundle' and "
            + "../../ifm:type!='Trunk-Serial' and ../../ifm:type!='Global-Mp-Group' and "
            + "../../ifm:type!='Gmpls-Uni' and ../../ifm:type!='HP-GE'";
        description
          "Configure interface IPv6 extension header filter configurations.";
        container hop-by-hop-switch {
          description
            "Configure the IPv6 packet with hop-by-hop options extension header switch.";
          leaf all-options {
            type filter-rule-type;
            description
              "All options of IPv6 extension header switch.";
          }

          container options {
            description
              "List of some options of IPv6 extension header switch.";
            list option {
              key "option-code";
              description
                "Configure some options of IPv6 extension header switch.";
              leaf option-code {
                type uint8 {
                  range "0..255";
                }
                description
                  "Option code of IPv6 extension header.";
              }

              leaf filter-rule {
                ext:support-filter "true";
                type filter-rule-type;
                mandatory true;
                description
                  "Filter policy of IPv6 packet.";
              }
            }  // list option
          }  // container options
        }  // container hop-by-hop-switch

        container routing-switch {
          description
            "Configure the IPv6 packet with routing options extension header switches.";
          leaf all-options {
            type filter-rule-type;
            description
              "All options of IPv6 extension header switch.";
          }

          container options {
            description
              "List of some options of IPv6 extension header switch.";
            list option {
              key "option-code";
              description
                "Configure some options of IPv6 extension header switch.";
              leaf option-code {
                type uint8 {
                  range "0..255";
                }
                description
                  "Option code of IPv6 extension header.";
              }

              leaf filter-rule {
                ext:support-filter "true";
                type filter-rule-type;
                mandatory true;
                description
                  "Filter policy of IPv6 packet.";
              }
            }  // list option
          }  // container options
        }  // container routing-switch

        container destination-switch {
          description
            "Configure the IPv6 packet with destination options extension header switches.";
          leaf all-options {
            type filter-rule-type;
            description
              "All options of IPv6 extension header switch.";
          }

          container options {
            description
              "List of some options of IPv6 extension header switch.";
            list option {
              key "option-code";
              description
                "Configure some options of IPv6 extension header switch.";
              leaf option-code {
                type uint8 {
                  range "0..255";
                }
                description
                  "Option code of IPv6 extension header.";
              }

              leaf filter-rule {
                ext:support-filter "true";
                type filter-rule-type;
                mandatory true;
                description
                  "Filter policy of IPv6 packet.";
              }
            }  // list option
          }  // container options
        }  // container destination-switch

        container no-option-exh-switchs {
          description
            "List of the IPv6 packet with no options extension header switches.";
          list no-option-exh-switch {
            key "exh-type";
            description
              "Configure the IPv6 packet with hop-by-hop options extension header switch.";
            leaf exh-type {
              type extension-header-type;
              description
                "IPv6 extension header type which have no option.";
            }

            leaf filter-rule {
              ext:support-filter "true";
              type filter-rule-type;
              mandatory true;
              description
                "Filter policy of IPv6 packet.";
            }
          }  // list no-option-exh-switch
        }  // container no-option-exh-switchs
      }  // container extension-header-filter
    }

    augment /ni:network-instance/ni:instances/ni:instance {
      description
        "All configurations of the PP6 under the network instance.";
      container icmp6-source-address {
        presence
          "Configure a loopback interface address as a source IP address for an ICMP6 error packet.";
        description
          "Configure a loopback interface address as a source IP address for an ICMP6 error packet.";
        leaf if-name {
          type leafref {
            path "/ifm:ifm/ifm:interfaces/ifm:interface/ifm:name";
          }
          must
            "/ifm:ifm/ifm:interfaces/ifm:interface[ifm:name=current()]/ifm:type='LoopBack'";
          must
            "/ifm:ifm/ifm:interfaces/ifm:interface[ifm:name=current()]/ip:ipv6";
          must
            "/ifm:ifm/ifm:interfaces/ifm:interface[ifm:name=current()]/ifm:vrf-name = ../../ni:name";
          mandatory true;
          description "Interface name.";
        }

        leaf pkt-type {
          type icmp-pkt-type;
          mandatory true;
          description
            "Packet type of ICMPv6.";
        }
      }  // container icmp6-source-address
    }
  }  // module huawei-pp6