Example for Configuring an EVC Model to Transmit VPLS Services

This section provides an example for configuring an EVC Model to transmit virtual private LAN service (VPLS) services. In this example, the EVC model is used to enable terminal users to communicate using single-tagged packets through a VPLS network.

Networking Requirements

On a VPLS network, the packet encapsulation mode on an attachment circuit (AC) is determined by the user access mode, which can be Ethernet or VLAN. When being transmitted over the public network, packets encapsulated in the Ethernet mode cannot carry any VLAN tags, whereas packets encapsulated in the VLAN mode must carry VLAN tags.

In Figure 1, VPN1 services are sent to a VPLS network using the Ethernet technique. To enable users in VPN1 to communicate with each other, a pop traffic behavior can be specified on a PE so that the PE removes tags from packets before forwarding them to the VPLS network.

Figure 1 Networking diagram for configuring an EVC to transmit VPLS services

Interface 2, sub-interface 1.1, and sub-interface 1.2 in this example represent GE 0/1/2, GE 0/1/1.1, and GE 0/1/1.2, respectively.


Precautions

The VPLS network transmits services over pseudowires (PWs). PWs support packets encapsulated using a VSI. VSI encapsulation types are as follows:
  • Ethernet: Untagged packets are transmitted on PWs.
  • VLAN: Tagged packets are transmitted on PWs.

Configuration Roadmap

The configuration roadmap is as follows:

  1. Configure Layer 2 forwarding on each CE.

    1. Create VLANs on each CE, add an EVC Layer 2 sub-interface connecting each CE to users to a VLAN, and assign each service to a specific VLAN.
    2. Configure Layer 2 forwarding on the interface connecting each CE to the network so that a CE sends single-tagged packets to a PE.

  2. Configure VPLS on each PE.

    1. Configure a routing protocol on PEs to implement network connectivity.
    2. Configure basic Multiprotocol Label Switching (MPLS) functions and MPLS Label Distribution Protocol (LDP) and establish MPLS Label Switched Paths (LSPs) on PEs.
    3. Enable MPLS L2VPN and global L2VPN on each PE.
    4. Create a VSI and configure Label Distribution Protocol (LDP) signaling on each PE, set VSI IDs used in PW signaling negotiation.
  3. Configure an EVC model on each PE:
    1. Configure a bridge domain to forward services.
    2. Create an EVC Layer 2 sub-interface, add it to the bridge domain, and specify traffic encapsulation types and behaviors on the EVC Layer 2 sub-interface.
    3. Bind a bridge domain to a VSI so that an EVC model transmits VPLS services.

Data Preparation

To complete the configuration, you need the following data:
  • User VLAN IDs
  • Number of interfaces that connect CEs to users and connect CEs to PEs
  • Number and IP addresses of interfaces connecting PEs
  • VSI ID on PEs (that must have the same VSI ID), MPLS LSR IDs, VSI name, and names of interfaces bound to a VSI
  • bridge domain ID, traffic encapsulation types, and traffic behaviors

Procedure

  1. Configure Layer 2 forwarding on each CE.

    # Configure CE1.

    <HUAWEI> system-view
[~HUAWEI] sysname CE1
[*HUAWEI] commit
[~CE1] vlan 10
[*CE1-vlan10] quit
[*CE1] interface gigabitethernet 0/1/1
[*CE1-GigabitEthernet0/1/1] undo shutdown
[*CE1-GigabitEthernet0/1/1] portswitch
[*CE1-GigabitEthernet0/1/1] port link-type access
[*CE1-GigabitEthernet0/1/1] port default vlan 10
[*CE1-GigabitEthernet0/1/1] quit
[*CE1] interface gigabitethernet 0/1/2
[*CE1-GigabitEthernet0/1/2] undo shutdown
[*CE1-GigabitEthernet0/1/2] portswitch
[*CE1-GigabitEthernet0/1/2] port link-type trunk
[*CE1-GigabitEthernet0/1/2] port trunk allow-pass vlan 10
[*CE1-GigabitEthernet0/1/2] commit
[~CE1-GigabitEthernet0/1/2] quit

    # Configure CE2.

    <HUAWEI> system-view
[~HUAWEI] sysname CE2
[*HUAWEI] commit
[~CE2] vlan 10
[*CE2-vlan10] quit
[*CE2] interface gigabitethernet 0/1/1
[*CE2-GigabitEthernet0/1/1] undo shutdown
[*CE2-GigabitEthernet0/1/1] portswitch
[*CE2-GigabitEthernet0/1/1] port link-type access
[*CE2-GigabitEthernet0/1/1] port default vlan 10
[*CE2-GigabitEthernet0/1/1] quit
[*CE2] interface gigabitethernet 0/1/2
[*CE2-GigabitEthernet0/1/2] undo shutdown
[*CE2-GigabitEthernet0/1/2] portswitch
[*CE2-GigabitEthernet0/1/2] port link-type trunk
[*CE2-GigabitEthernet0/1/2] port trunk allow-pass vlan 10
[*CE2-GigabitEthernet0/1/2] commit
[~CE2-GigabitEthernet0/1/2] quit

  2. Configure a VPLS network.

    1. # Configure OSPF on each PE.

      Assign an IP address and mask to each interface on each PE. After OSPF is enabled, the 32-bit loopback address of each PE must be advertised.

      # Configure PE1.

      <HUAWEI> system-view
[~HUAWEI] sysname PE1
[*HUAWEI] commit
[~PE1] interface loopback 1
[*PE1-LoopBack1] ip address 1.1.1.9 32
[*PE1-LoopBack1] quit
[*PE1] interface gigabitethernet 0/1/2
[*PE1-GigabitEthernet0/1/2] undo shutdown
[*PE1-GigabitEthernet0/1/2] ip address 10.1.1.1 24
[*PE1-GigabitEthernet0/1/2] quit
[*PE1] ospf
[*PE1-ospf-1] area 0
[*PE1-ospf-1-area-0.0.0.0] network 1.1.1.9 0.0.0.0
[*PE1-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255
[*PE1-ospf-1-area-0.0.0.0] quit
[*PE1-ospf-1] quit
[*PE1] commit

      # Configure PE2.

      <HUAWEI> system-view
[~HUAWEI] sysname PE2
[*HUAWEI] commit
[~PE2] interface loopback 1
[*PE2-LoopBack1] ip address 2.2.2.9 32
[*PE2-LoopBack1] quit
[*PE2] interface gigabitethernet 0/1/2
[*PE2-GigabitEthernet0/1/2] undo shutdown
[*PE2-GigabitEthernet0/1/2] ip address 10.1.1.2 24
[*PE2-GigabitEthernet0/1/2] quit
[*PE2] ospf
[*PE2-ospf-1] area 0
[*PE2-ospf-1-area-0.0.0.0] network 2.2.2.9 0.0.0.0
[*PE2-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255
[*PE2-ospf-1-area-0.0.0.0] quit
[*PE2-ospf-1] quit
[*PE2] commit

      After completing the configuration, run the display ip routing-table command on each PE. The command output shows that PE1 and PE2 running OSPF have discovered routes to each other's loopback1. The two PEs can ping each other.

      The following example uses the command output on PE1.

      [~PE1] display ip routing-table
Route Flags: R - relay, D - download to fib, T - to vpn-instance, B - black hole route
------------------------------------------------------------------------------
Routing Table : _public_
         Destinations : 9        Routes : 9

Destination/Mask    Proto   Pre  Cost        Flags NextHop         Interface

        1.1.1.9/32  Direct  0    0             D  127.0.0.1       LoopBack1
        2.2.2.9/32  OSPF    10   1             D  10.1.1.2        GigabitEthernet0/1/2
       10.1.1.0/24  Direct  0    0             D  10.1.1.1        GigabitEthernet0/1/2
       10.1.1.1/32  Direct  0    0             D  127.0.0.1       GigabitEthernet0/1/2
     10.1.1.255/32  Direct  0    0             D  127.0.0.1       GigabitEthernet0/1/2
      127.0.0.0/8   Direct  0    0             D  127.0.0.1       InLoopBack0
      127.0.0.1/32  Direct  0    0             D  127.0.0.1       InLoopBack0
127.255.255.255/32  Direct  0    0             D  127.0.0.1       InLoopBack0
255.255.255.255/32  Direct  0    0             D  127.0.0.1       InLoopBack0

    2. Configure the basic MPLS capability and LDP.

      # Configure PE1.

      [~PE1] mpls lsr-id 1.1.1.9
[*PE1] mpls
[*PE1-mpls] quit
[*PE1] mpls ldp
[*PE1-mpls-ldp] quit
[*PE1] interface gigabitethernet 0/1/2
[*PE1-GigabitEthernet0/1/2] mpls
[*PE1-GigabitEthernet0/1/2] mpls ldp
[*PE1-GigabitEthernet0/1/2] quit
[*PE1] commit

      # Configure PE2.

      [~PE2] mpls lsr-id 2.2.2.9
[*PE2] mpls
[*PE2-mpls] quit
[*PE2] mpls ldp
[*PE2-mpls-ldp] quit
[*PE2] interface gigabitethernet 0/1/2
[*PE2-GigabitEthernet0/1/2] mpls
[*PE2-GigabitEthernet0/1/2] mpls ldp
[*PE2-GigabitEthernet0/1/2] quit
[*PE2] commit

      After completing the preceding configuration, run the display mpls ldp session command on each PE. The command output shows that LDP session is in the Operational state, indicating that the LDP session between PE1 and PE2 has been established.

      [~PE1] 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  0000:00:00   1/1
--------------------------------------------------------------------------
TOTAL: 1 Session(s) Found.

      If the PEs are indirectly connected, run the mpls ldp remote-peer and remote-ip commands to create a remote LDP session between the PEs.

    3. Enable MPLS L2VPN.

      # Configure PE1.

      [~PE1] mpls l2vpn
[*PE1-l2vpn] quit
[*PE1] commit

      # Configure PE2.

      [~PE2] mpls l2vpn
[*PE2-l2vpn] quit
[*PE2] commit

    4. Create VSI and configure LDP signaling.

      # Configure PE1.

      [~PE1] vsi ldp1 bd-mode
[*PE1-vsi-ldp1] encapsulation ethernet
[*PE1-vsi-ldp1] pwsignal ldp
[*PE1-vsi-ldp1-ldp] vsi-id 2
[*PE1-vsi-ldp1-ldp] peer 2.2.2.9
[*PE1-vsi-ldp1-ldp] quit
[*PE1-vsi-ldp1] quit
[*PE1] commit

      # Configure PE2.

      [~PE2] vsi ldp1 bd-mode
[*PE2-vsi-ldp1] encapsulation ethernet
[*PE2-vsi-ldp1] pwsignal ldp
[*PE2-vsi-ldp1-ldp] vsi-id 2
[*PE2-vsi-ldp1-ldp] peer 1.1.1.9
[*PE2-vsi-ldp1-ldp] quit
[*PE2-vsi-ldp1] quit
[*PE2] commit

  3. Establish an EVC model.

    1. Configure a bridge domain on each PE.

      # Configure PE1.

      [~PE1] bridge-domain 10
[*PE1-bd10] quit

      # Configure PE2.

      [~PE2] bridge-domain 10
[*PE2-bd10] quit

    2. Create an EVC Layer 2 sub-interface, add it to the bridge domain, and specify traffic encapsulation types and behaviors on the EVC Layer 2 sub-interface.

      # Configure PE1.

      [*PE1] interface gigabitethernet 0/1/1
[*PE1-GigabitEthernet0/1/1] undo shutdown
[*PE1-GigabitEthernet0/1/1] quit
[*PE1] interface gigabitethernet 0/1/1.1 mode l2
[*PE1-GigabitEthernet0/1/1.1] encapsulation dot1q vid 10
[*PE1-GigabitEthernet0/1/1.1] rewrite pop single
[*PE1-GigabitEthernet0/1/1.1] bridge-domain 10
[*PE1-GigabitEthernet0/1/1.1] commit
[~PE1-GigabitEthernet0/1/1] quit

      # Configure PE2.

      [~PE2] interface gigabitethernet 0/1/1
[*PE2-GigabitEthernet0/1/1] undo shutdown
[*PE2-GigabitEthernet0/1/1] quit
[*PE2] interface gigabitethernet 0/1/1.1 mode l2
[*PE2-GigabitEthernet0/1/1.1] encapsulation dot1q vid 10
[*PE2-GigabitEthernet0/1/1.1] rewrite pop single
[*PE2-GigabitEthernet0/1/1.1] bridge-domain 10
[*PE2-GigabitEthernet0/1/1.1] commit
[~PE2-GigabitEthernet0/1/1] quit

    3. Bind the bridge domain to the VSI.

      # Configure PE1.

      [~PE1] bridge-domain 10
[*PE1-bd10] l2 binding vsi ldp1
[*PE1-bd10] commit
[~PE1] quit

      # Configure PE2.

      [~PE2] bridge-domain 10
[*PE2-bd10] l2 binding vsi ldp1
[*PE2-bd10] commit
[~PE2] quit

  4. Verify the configuration.

    After completing the configuration, run the display bridge-domain command to view bridge domain information, including the bridge domain to which an EVC Layer 2 sub-interface belongs and the bridge domain status. The following example uses the command output on PE1.

    [~PE1] display bridge-domain
The total number of bridge-domains is : 1
--------------------------------------------------------------------------------
MAC_LRN: MAC learning;         STAT: Statistics;         SPLIT: Split-horizon;
BC: Broadcast;                 MC: Unknown multicast;    UC: Unknown unicast;
*down: Administratively down;  FWD: Forward;             DSD: Discard;
--------------------------------------------------------------------------------

BDID  State MAC-LRN STAT    BC  MC  UC  SPLIT   Description
--------------------------------------------------------------------------------
10    up    enable  disable FWD FWD FWD disable

    Run the display ethernet uni information command to view information about the traffic encapsulation type and behavior configured on an EVC Layer 2 sub-interface. The following example uses the command output on PE2.

    [~PE2] display ethernet uni information
  GigabitEthernet0/1/1.1
    Total encapsulation number: 1
      encapsulation dot1q vid 10
    Rewrite pop single
    Bridge-domain 10

    Run the display vsi name ldp1 verbose command on PE1. The command output shows that a PW for a VSI named ldp1 has been established between PE1 and PE2, and the VSI status is Up. The following example uses the command output on PE1.

    [~PE1] display vsi name ldp1 verbose
***VSI Name               : ldp1
    Administrator VSI      : no
    Isolate Spoken         : disable
    VSI Index              : 2
    PW Signaling           : ldp
    Member Discovery Style : --
    Bridge-domain Mode     : enable
    PW MAC Learn Style     : qualify
    Encapsulation Type     : ethernet
    MTU                    : 1500
    Ignore AcState         : disable
    P2P VSI                : disable
    Create Time            : 0 days, 0 hours, 1 minutes, 56 seconds
    VSI State              : up
    Resource Status        : --

    VSI ID                 : 2
   *Peer Router ID         : 2.2.2.9
    primary or secondary   : primary
    ignore-standby-state   : no
    VC Label               : 32830
    Peer Type              : dynamic
    Session                : up
    Tunnel ID              : 0x0000000001004c4b42
    Broadcast Tunnel ID    : --
    Broad BackupTunnel ID  : --
    CKey                   : 33
    NKey                   : 1409286261
    Stp Enable             : 0
    PwIndex                : 33
    Control Word           : disable

    Access bridge-domain   : bridge-domain 10

  **PW Information:

   *Peer Ip Address        : 2.2.2.9
    PW State               : up
    Local VC Label         : 32830
    Remote VC Label        : 32831
    Remote Control Word    : disable
    PW Type                : label
    Tunnel ID              : 0x0000000001004c4b42
    Broadcast Tunnel ID    : --
    Broad BackupTunnel ID  : --
    Ckey                   : 33
    Nkey                   : 1409286261
    Main PW Token          : 0x0
    Slave PW Token         : 0x0
    Tnl Type               : ldp
    OutInterface           : GE0/1/2
    Backup OutInterface    : --
    Stp Enable             : 0
    Mac Flapping           : 0
    PW Last Up Time        : 1976/12/04 00:05:59
    PW Total Up Time       : 0 days, 0 hours, 0 minutes, 17 seconds

Configuration Files

  • PE1 configuration file

    #
sysname PE1
#
mpls lsr-id 1.1.1.9
#
mpls
#
mpls l2vpn
#
vsi ldp1 bd-mode
 pwsignal ldp
  vsi-id 2
  peer 2.2.2.9
 encapsulation ethernet
#
bridge-domain 10
 l2 binding vsi ldp1
#
mpls ldp
#
interface GigabitEthernet0/1/1
 undo shutdown
#
interface GigabitEthernet0/1/1.1 mode l2
 encapsulation dot1q vid 10
 rewrite pop single
 bridge-domain 10
#
interface GigabitEthernet0/1/2
 undo shutdown
 ip address 10.1.1.1 255.255.255.0
 mpls
 mpls ldp
#
ospf 1
 area 0.0.0.0
  network 1.1.1.9 0.0.0.0
  network 10.1.1.0 0.0.0.255
#
return

  • PE2 configuration file

    #
sysname PE2
#
mpls lsr-id 2.2.2.9
#
mpls
#
mpls l2vpn
#
vsi ldp1 bd-mode
 pwsignal ldp
  vsi-id 2
  peer 1.1.1.9
 encapsulation ethernet
#
bridge-domain 10
 l2 binding vsi ldp1
#
mpls ldp
 #
interface GigabitEthernet0/1/1
 undo shutdown
#
interface GigabitEthernet0/1/1.1 mode l2
 encapsulation dot1q vid 10
 rewrite pop single
 bridge-domain 10
#
interface GigabitEthernet0/1/2
 undo shutdown
 ip address 10.1.1.2 255.255.255.0
 mpls
 mpls ldp
#
ospf 1
 area 0.0.0.0
  network 2.2.2.9 0.0.0.0
  network 10.1.1.0 0.0.0.255
#
return

  • CE1 configuration file

    #
sysname CE1
#
interface GigabitEthernet0/1/1
 portswitch
 undo shutdown
 port link-type access
 port default vlan 10
#
interface GigabitEthernet0/1/2
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10
#
return

  • CE2 configuration file

    #
sysname CE2
#
interface GigabitEthernet0/1/1
 portswitch
 undo shutdown
 port link-type access
 port default vlan 10
#
interface GigabitEthernet0/1/2
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10
#
return
Parent Topic: Configuration Examples for EVC
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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