Example for Configuring Dynamic VPWS Accessing VPLS

If UPEs do not support VPLS, you can configure VPWS accessing VPLS.

Networking Requirements

On the network shown in Figure 1, UPEs access SPEs over VPWS; CE1 and CE2 access a full-mesh VPLS network through UPEs.

Figure 1 Networking diagram for configuring dynamic VPWS accessing VPLS
  • Interface 1, interface 2, sub-interface 1.1, and sub-interface 2.1 in this example represent GE 0/1/0, GE 0/1/8, GE 0/1/0.1, and GE 0/1/8.1, respectively.



Configuration Notes

When configuring dynamic VPWS accessing VPLS, note the following:

  • PEs belonging to the same L2VPN must have the same VSI ID.

Configuration Roadmap

The configuration roadmap is as follows:

  1. Configure LDP VPLS between SPEs.

  2. Configure basic MPLS L2VPN functions on UPEs and SPEs.

  3. Enable MAC Withdrawal for the VSI on each SPE.

  4. Configure UPEs to access SPEs over VPWS.

Data Preparation

To complete the configuration, you need the following data:

  • VSI names and IDs

  • MPLS LSR IDs of UPEs and SPEs, which are used as peer IP addresses

  • Routing protocol

Procedure

  1. Configure IP addresses.

    Configure an IP address and mask for each interface, including the loopback interface, according to Figure 1.

    UPEs function as switching devices. If all the interfaces on UPEs are Layer 2 GE interfaces, you cannot directly configure IP addressed for the interfaces. Instead, you need to add the interfaces to a VLAN, and then configure IP addresses for the VLANIF interfaces. For details, see "VLAN Configuration" in NetEngine 8000 F Configuration Guide - LAN Access and MAN Access.

  2. Configure an IGP.

    Configure OSPF on SPEs and P to advertise the network segment and the host routes of LSR IDs.

    # Configure SPE1.

    <SPE1> system-view
    [~SPE1] ospf
    [*SPE1-ospf-1] area 0
    [*SPE1-ospf-1-area-0.0.0.0] network 1.1.1.9 0.0.0.0
    [*SPE1-ospf-1-area-0.0.0.0] network 10.10.1.0 0.0.0.255
    [*SPE1-ospf-1-area-0.0.0.0] network 10.10.3.0 0.0.0.255
    [*SPE1-ospf-1-area-0.0.0.0] quit
    [*SPE1-ospf-1] quit
    [*SPE1] commit

    # Configure the P.

    <P> system-view
    [~P] ospf
    [*P-ospf-1] area 0
    [*P-ospf-1-area-0.0.0.0] network 2.2.2.9 0.0.0.0
    [*P-ospf-1-area-0.0.0.0] network 10.10.1.0 0.0.0.255
    [*P-ospf-1-area-0.0.0.0] network 10.10.2.0 0.0.0.255
    [*P-ospf-1-area-0.0.0.0] quit
    [*P-ospf-1] quit
    [*P] commit

    # Configure SPE2.

    <SPE2> system-view
    [~SPE2] ospf
    [*SPE2-ospf-1] area 0
    [*SPE2-ospf-1-area-0.0.0.0] network 3.3.3.9 0.0.0.0
    [*SPE2-ospf-1-area-0.0.0.0] network 10.10.2.0 0.0.0.255
    [*SPE2-ospf-1-area-0.0.0.0] network 10.10.4.0 0.0.0.255
    [*SPE2-ospf-1-area-0.0.0.0] quit
    [*SPE2-ospf-1] quit
    [*SPE2] commit

    # Configure UPE1.

    <UPE1> system-view
    [~UPE1] ospf
    [*UPE1-ospf-1] area 0
    [*UPE1-ospf-1-area-0.0.0.0] network 4.4.4.9 0.0.0.0
    [*UPE1-ospf-1-area-0.0.0.0] network 10.10.3.0 0.0.0.255
    [*UPE1-ospf-1-area-0.0.0.0] quit
    [*UPE1-ospf-1] quit
    [*UPE1] commit

    # Configure UPE2.

    <UPE2> system-view
    [~UPE2] ospf
    [*UPE2-ospf-1] area 0
    [*UPE2-ospf-1-area-0.0.0.0] network 5.5.5.9 0.0.0.0
    [*UPE2-ospf-1-area-0.0.0.0] network 10.10.4.0 0.0.0.255
    [*UPE2-ospf-1-area-0.0.0.0] quit
    [*UPE2-ospf-1] quit
    [*UPE2] commit

  3. Configure basic MPLS functions and LDP.

    # Configure SPE1.

    [~SPE1] mpls lsr-id 1.1.1.9
    [*SPE1] mpls
    [*SPE1-mpls] quit
    [*SPE1] mpls ldp
    [*SPE1-mpls-ldp] quit
    [*SPE1] interface gigabitethernet 0/1/0
    [*SPE1-GigabitEthernet0/1/0] mpls
    [*SPE1-GigabitEthernet0/1/0] mpls ldp
    [*SPE1-GigabitEthernet0/1/0] quit
    [*SPE1-GigabitEthernet0/1/8] mpls
    [*SPE1-GigabitEthernet0/1/8] mpls ldp
    [*SPE1-GigabitEthernet0/1/8] quit
    [*SPE1] commit

    # Configure the P.

    [~P] mpls lsr-id 2.2.2.9
    [*P] mpls
    [*P-mpls] quit
    [*P] mpls ldp
    [*P-mpls-ldp] quit
    [*P] interface gigabitethernet 0/1/0
    [*P-GigabitEthernet0/1/0] mpls
    [*P-GigabitEthernet0/1/0] mpls ldp
    [*P-GigabitEthernet0/1/0] quit
    [*P] interface gigabitethernet 0/1/8
    [*P-GigabitEthernet0/1/8] mpls
    [*P-GigabitEthernet0/1/8] mpls ldp
    [*P-GigabitEthernet0/1/8] quit
    [*P] commit

    # Configure SPE2.

    [~SPE2] mpls lsr-id 3.3.3.9
    [*SPE2] mpls
    [*SPE2-mpls] quit
    [*SPE2] mpls ldp
    [*SPE2-mpls-ldp] quit
    [*SPE2] interface gigabitethernet 0/1/0
    [*SPE2-GigabitEthernet0/1/0] mpls
    [*SPE2-GigabitEthernet0/1/0] mpls ldp
    [*SPE2-GigabitEthernet0/1/0] quit
    [*SPE2-GigabitEthernet0/1/8] mpls
    [*SPE2-GigabitEthernet0/1/8] mpls ldp
    [*SPE2-GigabitEthernet0/1/8] quit
    [*SPE2] commit

    # Configure UPE1.

    [~UPE1] mpls lsr-id 4.4.4.9
    [*UPE1] mpls
    [*UPE1-mpls] quit
    [*UPE1] mpls ldp
    [*UPE1-mpls-ldp] quit
    [*UPE1] interface gigabitethernet 0/1/0
    [*UPE1-GigabitEthernet0/1/0] mpls
    [*UPE1-GigabitEthernet0/1/0] mpls ldp
    [*UPE1-GigabitEthernet0/1/0] quit
    [*UPE1] commit

    # Configure UPE2.

    [~UPE2] mpls lsr-id 5.5.5.9
    [*UPE2] mpls
    [*UPE2-mpls] quit
    [*UPE2] mpls ldp
    [*UPE2-mpls-ldp] quit
    [*UPE2] interface gigabitethernet 0/1/0
    [*UPE2-GigabitEthernet0/1/0] mpls
    [*UPE2-GigabitEthernet0/1/0] mpls ldp
    [*UPE2-GigabitEthernet0/1/0] quit
    [~UPE2] commit

    After completing the configuration, run the display mpls ldp session command on SPE1, P, and SPE2. The status of the peer relationship between SPE1 and P or between SPE2 and P is Operational, which indicates that the peer relationship has been established. Run the display mpls lsp command to view information about MPLS LSP establishment.

    The information displayed on SPE1 is used as an example.

    <SPE1> display mpls ldp session
    LDP Session(s) in Public Network
    Codes: LAM(Label Advertisement Mode), SsnAge Unit(DDDD:HH:MM)
     An asterisk (*) before a session means the session is being deleted.
     ------------------------------------------------------------------------------
     PeerID            Status      LAM  SsnRole  SsnAge      KASent/Rcv
     ------------------------------------------------------------------------------
     2.2.2.9:0          Operational DU   Passive  000:00:01   7/7
     ------------------------------------------------------------------------------
     TOTAL: 1 session(s) Found.
    <SPE1> display mpls lsp
    Flag after Out IF: (I) - RLFA Iterated LSP, (I*) - Normal and RLFA Iterated LSP 
    Flag after LDP FRR: (L) - Logic FRR LSP
    ----------------------------------------------------------------------
                     LSP Information: LDP LSP
    ----------------------------------------------------------------------
    FEC                In/Out Label  In/Out IF                      Vrf Name
    2.2.2.9/32         NULL/3        -/GigabitEthernet0/1/0
    1.1.1.9/32         3/NULL        -/-
    3.3.3.9/32         NULL/1025     -/GigabitEthernet0/1/0

  4. Establish a remote LDP session between SPEs.

    # Configure SPE1.

    [~SPE1] mpls ldp remote-peer 3.3.3.9
    [*SPE1-mpls-ldp-remote-3.3.3.9] remote-ip 3.3.3.9
    [*SPE1-mpls-ldp-remote-3.3.3.9] quit
    [*SPE1] commit

    # Configure SPE2.

    [~SPE2] mpls ldp remote-peer 1.1.1.9
    [*SPE2-mpls-ldp-remote-1.1.1.9] remote-ip 1.1.1.9
    [*SPE2-mpls-ldp-remote-1.1.1.9] quit
    [*SPE2] commit

    After completing the configuration, run the display mpls ldp session command on SPE1 and SPE2. The status of the peer relationship between SPE1 and SPE2 is Operational, which indicates that the peer relationship has been established.

    The information displayed on SPE1 is used as an example.

    <SPE1> display mpls ldp session
    LDP Session(s) in Public Network
    Codes: LAM(Label Advertisement Mode), SsnAge Unit(DDDD:HH:MM)
     An asterisk (*) before a session means the session is being deleted.
     ------------------------------------------------------------------------------
     PeerID            Status      LAM  SsnRole  SsnAge      KASent/Rcv
     ------------------------------------------------------------------------------
     2.2.2.9:0          Operational DU   Passive  000:00:05   24/24
     3.3.3.9:0          Operational DU   Passive  000:00:01   5/5
     ------------------------------------------------------------------------------
     TOTAL: 2 session(s) Found.

  5. Enable MPLS L2VPN on UPEs and configure UPEs to access SPEs over VPWS.

    # Configure UPE1.

    <UPE1> system-view
    [~UPE1] mpls l2vpn
    [*UPE1-l2vpn] quit
    [*UPE1] interface gigabitethernet 0/1/8.1
    [*UPE1-GigabitEthernet0/1/8.1] shutdown
    [*UPE1-GigabitEthernet0/1/8.1] vlan-type dot1q 1
    [*UPE1-GigabitEthernet0/1/8.1] mpls l2vc 1.1.1.9 100
    [*UPE1-GigabitEthernet0/1/8.1] undo shutdown
    [*UPE1-GigabitEthernet0/1/8.1] quit
    [*UPE1] commit

    # Configure UPE2.

    <UPE2> system-view
    [~UPE2] mpls l2vpn
    [*UPE2-l2vpn] quit
    [*UPE2] interface gigabitethernet 0/1/8.1
    [*UPE2-GigabitEthernet0/1/8.1] shutdown
    [*UPE2-GigabitEthernet0/1/8.1] vlan-type dot1q 1
    [*UPE2-GigabitEthernet0/1/8.1] mpls l2vc 3.3.3.9 100
    [*UPE2-GigabitEthernet0/1/8.1] undo shutdown
    [*UPE2-GigabitEthernet0/1/8.1] quit
    [*UPE2] commit

  6. Enable MPLS L2VPN on SPEs

    # Configure SPE1.

    <SPE1> system-view
    [~SPE1] mpls l2vpn
    [*SPE1] vsi v100 
    [*SPE1-vsi-v100] pwsignal ldp
    [*SPE1-vsi-v100-ldp] vsi-id 100
    [*SPE1-vsi-v100-ldp] mac-withdraw enable
    [*SPE1-vsi-v100-ldp] peer 3.3.3.9
    [*SPE1-vsi-v100-ldp] peer 4.4.4.9 upe
    [*SPE1-vsi-v100-ldp] quit
    [*SPE1-vsi-v100] quit
    [*SPE1] commit

    # Configure SPE2.

    <SPE2> system-view
    [~SPE2] mpls l2vpn
    [*SPE2] vsi v100 
    [*SPE2-vsi-v100] pwsignal ldp
    [*SPE2-vsi-v100-ldp] vsi-id 100
    [*SPE2-vsi-v100-ldp] mac-withdraw enable
    [*SPE2-vsi-v100-ldp] peer 1.1.1.9
    [*SPE2-vsi-v100-ldp] peer 5.5.5.9 upe
    [*SPE2-vsi-v100-ldp] quit
    [*SPE2-vsi-v100] quit
    [*SPE2] commit

  7. Verify the configuration.

    After completing the configurations, run the display mpls l2vc command on UPEs. The command output shows that a PW has been established and VC state is up. The following example uses the command output on UPE1.

    <UPE1> display mpls l2vc interface gigabitethernet 0/1/8.1
    *client interface       : GigabitEthernet0/1/8.1 is up
     Administrator PW       : no
     session state          : up
     AC status              : up
     VC state               : up
     Label state            : 0
     Token state            : 0
     VC ID                  : 100
     VC type                : VLAN
     destination            : 1.1.1.9
     local group ID         : 0         remote group ID      : 0
     local VC label         : 23        remote VC label      : 24
     local AC OAM State     : up
     local PSN OAM State    : up
     local forwarding state : forwarding
     local status code      : 0x0 (forwarding)
     remote AC OAM State    : up
     remote PSN OAM state   : up
     remote forwarding state: forwarding
     remote status code     : 0x0 (forwarding)
     ignore standby state   : no
     BFD for PW             : unavailable
     VCCV State             : --
     manual fault           : not set
     active state           : active
     forwarding entry       : exist
     OAM Protocol           : --
     OAM Status             : --
     OAM Fault Type         : --
     PW APS ID              : --  
     PW APS Status          : --
     TTL Value              : 1
     link state             : up
     local VC MTU           : 1500      remote VC MTU        : 1500
     local VCCV             : alert ttl lsp-ping bfd
     remote VCCV            : alert lsp-ping
     local control word     : disable   remote control word  : disable
     tunnel policy name     : --
     PW template name       : --
     primary or secondary   : primary
     load balance type      : flow
     Access-port            : false
     Switchover Flag        : false
     VC tunnel info         : 1 tunnels
        NO.0 TNL type       : ldp, TNL ID : 0x0000000001004c4b61
     create time            : 0 days, 0 hours, 19 minutes, 17 seconds
     up time                : 0 days, 0 hours, 14 minutes, 34 seconds
     last change time       : 0 days, 0 hours, 14 minutes, 34 seconds
     VC last up time        : 2012/12/05 08:13:31
     VC total up time       : 0 days, 0 hours, 14 minutes, 34 seconds
     CKey                   : 65
     NKey                   : 1493172339
     PW redundancy mode     : frr
     AdminPw interface      : --
     AdminPw link state     : --
     Forward state          : send inactive, receive inactive 
     Diffserv Mode          : uniform
     Service Class          : --
     Color                  : --
     DomainId               : --
     Domain Name            : --

    Run the display vsi name v100 verbose command on SPEs. The command output shows that the VSI named v100 is up and the corresponding PW is also up. The information displayed on SPE1 is used as an example.

    <SPE1> display vsi name v100 verbose
     ***VSI Name               : v100
        Administrator VSI      : no
        Isolate Spoken         : disable
        VSI Index              : 2
        PW Signaling           : ldp
        Member Discovery Style : --
        Bridge-domain Mode     : disable
        PW MAC Learning Style  : unqualify
        Encapsulation Type     : vlan
        MTU                    : 1500
        Diffserv Mode          : uniform
        Service Class          : --
        Color                  : --
        DomainId               : 255
        Domain Name            :
        Ignore AcState         : disable
        P2P VSI                : disable
        Create Time            : 0 days, 0 hours, 4 minutes, 8 seconds
        VSI State              : up
        Resource Status        : --
    
        VSI ID                 : 100
       *Peer Router ID         : 3.3.3.9
        primary or secondary   : primary
        ignore-standby-state   : no
        VC Label               : 23
        Peer Type              : dynamic
        Session                : up
        Tunnel ID              : 0x0000000001004c4b62
        Broadcast Tunnel ID    : --
        Broad BackupTunnel ID  : --
        CKey                   : 33
        NKey                   : 788529266
        Stp Enable             : 0
        PwIndex                : 33
        Control Word           : disable
       *Peer Router ID         : 4.4.4.9
        primary or secondary   : primary
        ignore-standby-state   : no
        VC Label               : 24
        Peer Type              : dynamic
        Session                : up
        Tunnel ID              : 0x0000000001004c4b63
        Broadcast Tunnel ID    : --
        Broad BackupTunnel ID  : --
        CKey                   : 34
        NKey                   : 788529267
        Stp Enable             : 0
        PwIndex                : 34
        Control Word           : disable
    
      **PW Information:
    
       *Peer Ip Address        : 3.3.3.9
        PW State               : up
        Local VC Label         : 23
        Remote VC Label        : 19
        Remote Control Word    : disable
        PW Type                : label
        Tunnel ID              : 0x0000000001004c4b62
        Broadcast Tunnel ID    : --
        Broad BackupTunnel ID  : --
        Ckey                   : 33
        Nkey                   : 788529266
        Main PW Token          : 0x0
        Slave PW Token         : 0x0
        Tnl Type               : ldp
        OutInterface           : LDP LSP
        Backup OutInterface    : --
        Stp Enable             : 0
        PW Last Up Time        : 2012/12/05 08:14:03
        PW Total Up Time       : 0 days, 0 hours, 2 minutes, 20 seconds
       *Peer Ip Address        : 4.4.4.9
        PW State               : up
        Local VC Label         : 24
        Remote VC Label        : 23
        Remote Control Word    : disable
        PW Type                : MEHVPLS
        Tunnel ID              : 0x0000000001004c4b63
        Broadcast Tunnel ID    : --
        Broad BackupTunnel ID  : --
        Ckey                   : 34
        Nkey                   : 788529267
        Main PW Token          : 0x0
        Slave PW Token         : 0x0
        Tnl Type               : ldp
        OutInterface           : LDP LSP
        Backup OutInterface    : --
        Stp Enable             : 0
        PW Last Up Time        : 2012/12/05 08:13:30
        PW Total Up Time       : 0 days, 0 hours, 3 minutes, 7 seconds 

    CE1 and CE2, which reside on the same network segment, can ping each other. After the shutdown command is run on GE 0/1/8.1 that is bound to the VSI on the UPE or PE, CE1 and CE2 cannot ping each other. This indicates that service data is transmitted through the PW of the VSI.

    Before GE 0/1/8 on SPE1 is shut down, check the MAC address table learned by the VSI on SPE2.

    <SPE2> display mac-address dynamic
    MAC address table of slot 1:
    -------------------------------------------------------------------------------
    MAC Address    VLAN/BD/    PEVLAN CEVLAN Port                        Type      LSP/LSR-ID
                   VSI/SI/EVPN                                                     MAC-Tunnel
    -------------------------------------------------------------------------------
    00e0-fc00-1234 V100        -      -      GigabitEthernet0/1/8        dynamic   10/51
    00e0-fc00-3456 V100        -      -      GigabitEthernet0/1/0        dynamic   10/49
    -------------------------------------------------------------------------------
    Total matching items on slot 1 displayed = 2

    After GE 0/1/8 on SPE1 is shut down, the VSI becomes down. Check the MAC address table learned by the VSI on SPE2, and you can find that the MAC address learned by GE 0/1/8 is deleted.

Configuration Files

  • CE1 configuration file

    #
     sysname CE1
    #
    interface GigabitEthernet0/1/0
     undo shutdown
    #
    interface GigabitEthernet0/1/0.1
     undo shutdown
     vlan-type dot1q 1
     ip address 10.1.1.1 255.255.255.0
    #
    return
  • CE2 configuration file

    #
     sysname CE2
    #
    interface GigabitEthernet0/1/0
     undo shutdown
    #
    interface GigabitEthernet0/1/0.1
     undo shutdown
     vlan-type dot1q 1
     ip address 10.1.1.2 255.255.255.0
    #
    return
  • UPE1 configuration file

    #
     sysname UPE1
    #
     mpls lsr-id 4.4.4.9
     mpls
    #
     mpls l2vpn
    #
    mpls ldp
    #
    interface GigabitEthernet0/1/0
     undo shutdown
     ip address 10.10.3.2 255.255.255.0
     mpls
     mpls ldp
    #
    interface GigabitEthernet0/1/8
     undo shutdown
    #
    interface GigabitEthernet0/1/8.1
     undo shutdown
     vlan-type dot1q 1
     mpls l2vc 1.1.1.9 100
    #
    interface LoopBack1
     ip address 4.4.4.9 255.255.255.255
    #
    ospf 1
     area 0.0.0.0
      network 4.4.4.9 0.0.0.0
      network 10.10.3.0 0.0.0.255
    #
    return
  • SPE1 configuration file

    #
     sysname SPE1
    #
     mpls lsr-id 1.1.1.9
     mpls
    #
     mpls l2vpn
    #
    vsi v100 
     pwsignal ldp
      vsi-id 100
      peer 3.3.3.9
      peer 4.4.4.9 upe
    #
    mpls ldp
    #
     mpls ldp remote-peer 3.3.3.9
     remote-ip 3.3.3.9
    #
    interface GigabitEthernet0/1/0
     undo shutdown
     ip address 10.10.1.1 255.255.255.0
     mpls
     mpls ldp
    #
    interface GigabitEthernet0/1/8
     undo shutdown
     ip address 10.10.3.1 255.255.255.0
     mpls
     mpls ldp
    #
    interface LoopBack1
     ip address 1.1.1.9 255.255.255.255
    #
    ospf 1
     area 0.0.0.0
      network 1.1.1.9 0.0.0.0
      network 10.10.1.0 0.0.0.255
      network 10.10.3.0 0.0.0.255
    #
    return
  • P configuration file

    #
     sysname P
    #
     mpls lsr-id 2.2.2.9
     mpls
    #
    mpls ldp
    #
    interface GigabitEthernet0/1/0
     undo shutdown
     ip address 10.10.1.2 255.255.255.0
     mpls
     mpls ldp
    #
    interface GigabitEthernet0/1/8
     undo shutdown
     ip address 10.10.2.1 255.255.255.0
     mpls
     mpls ldp
    #
    interface LoopBack1
     ip address 2.2.2.9 255.255.255.255
    #
    ospf 1
     area 0.0.0.0
      network 2.2.2.9 0.0.0.0
      network 10.10.1.0 0.0.0.255
      network 10.10.2.0 0.0.0.255
    #
    return
  • SPE2 configuration file

    #
     sysname SPE2
    #
     mpls lsr-id 3.3.3.9
     mpls
    #
     mpls l2vpn
    #
    vsi v100 
     pwsignal ldp
      vsi-id 100
      peer 1.1.1.9
      peer 5.5.5.9 upe
    #
    mpls ldp
    #
     mpls ldp remote-peer 1.1.1.9
     remote-ip 1.1.1.9
    #
    interface GigabitEthernet0/1/0
     undo shutdown
     ip address 10.10.2.2 255.255.255.0
     mpls
     mpls ldp
    #
    interface GigabitEthernet0/1/8
     undo shutdown
     ip address 10.10.4.1 255.255.255.0
     mpls
     mpls ldp
    #
    interface LoopBack1
     ip address 3.3.3.9 255.255.255.255
    #
    ospf 1
     area 0.0.0.0
      network 3.3.3.9 0.0.0.0
      network 10.10.2.0 0.0.0.255
      network 10.10.4.0 0.0.0.255
    #
    return
  • UPE2 configuration file

    #
     sysname UPE2
    #
     mpls lsr-id 5.5.5.9
     mpls
    #
     mpls l2vpn
    #
    mpls ldp
    #
    interface GigabitEthernet0/1/0
     undo shutdown
     ip address 10.10.4.2 255.255.255.0
     mpls
     mpls ldp
    #
    interface GigabitEthernet0/1/8
     undo shutdown
    #
    interface GigabitEthernet0/1/8.1
     undo shutdown
     vlan-type dot1q 1
     mpls l2vc 3.3.3.9 100
    #
    interface LoopBack1
     ip address 5.5.5.9 255.255.255.255
    #
    ospf 1
     area 0.0.0.0
      network 5.5.5.9 0.0.0.0
      network 10.10.4.0 0.0.0.255
    #
    return
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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