BGP PW configuration example

Network requirements

Create BGP PWs among PEs so CEs in different sites of VPN 1 can communicate with each other.

Figure 86: Network diagram

Configuration procedure

  1. Configure the IGP and public tunnels. (Details not shown.)

  2. Configure PE 1:

    # Configure basic MPLS.

    <PE1> system-view
    [PE1] interface loopback 0
    [PE1-LoopBack0] ip address 1.1.1.9 32
    [PE1-LoopBack0] quit
    [PE1] mpls lsr-id 1.1.1.9
    [PE1] mpls ldp
    [PE1-ldp] quit
    

    # Establish IBGP connections to PE 2 and PE 3 and use BGP to advertise VPLS label block information.

    [PE1] bgp 100
    [PE1-bgp] peer 2.2.2.9 as-number 100
    [PE1-bgp] peer 2.2.2.9 connect-interface loopback 0
    [PE1-bgp] peer 3.3.3.9 as-number 100
    [PE1-bgp] peer 3.3.3.9 connect-interface loopback 0
    [PE1-bgp] address-family l2vpn
    [PE1-bgp-l2vpn] peer 2.2.2.9 enable
    [PE1-bgp-l2vpn] peer 3.3.3.9 enable
    [PE1-bgp-l2vpn] quit
    [PE1-bgp] quit
    

    # Enable L2VPN.

    [PE1] l2vpn enable
    

    # Configure the VSI aaa to use BGP to establish BGP PWs to PE 2 and PE 3.

    [PE1] vsi aaa
    [PE1-vsi-aaa] auto-discovery bgp
    [PE1-vsi-aaa-auto] route-distinguisher 1:1
    [PE1-vsi-aaa-auto] vpn-target 1:1
    [PE1-vsi-aaa-auto] signaling-protocol bgp
    [PE1-vsi-aaa-auto-bgp] site 1 range 10 default-offset 0
    [PE1-vsi-aaa-auto-bgp] quit
    [PE1-vsi-aaa-auto] quit
    [PE1-vsi-aaa] quit
    

    # Create service instance 10 on Ten-GigabitEthernet 1/0/1 to match all packets.

    [PE1] interface ten-gigabitethernet1/0/1
    [PE1-Ten-GigabitEthernet1/0/1] service-instance 10
    [PE1-Ten-GigabitEthernet1/0/1-srv10] encapsulation default
    

    # Bind service instance 10 to the VSI aaa.

    [PE1-Ten-GigabitEthernet1/0/1-srv10] xconnect vsi aaa
    
  3. Configure PE 2:

    # Configure basic MPLS.

    <PE2> system-view
    [PE2] interface loopback 0
    [PE2-LoopBack0] ip address 2.2.2.9 32
    [PE2-LoopBack0] quit
    [PE2] mpls lsr-id 2.2.2.9
    [PE2] mpls ldp
    [PE2-ldp] quit
    

    # Establish IBGP connections to PE 2 and PE 3 and use BGP to advertise VPLS label block information.

    [PE2] bgp 100
    [PE2-bgp] peer 1.1.1.9 as-number 100
    [PE2-bgp] peer 1.1.1.9 connect-interface loopback 0
    [PE2-bgp] peer 3.3.3.9 as-number 100
    [PE2-bgp] peer 3.3.3.9 connect-interface loopback 0
    [PE2-bgp] address-family l2vpn
    [PE2-bgp-l2vpn] peer 1.1.1.9 enable
    [PE2-bgp-l2vpn] peer 3.3.3.9 enable
    [PE2-bgp-l2vpn] quit
    [PE2-bgp] quit
    

    # Enable L2VPN.

    [PE2] l2vpn enable
    

    # Configure the VSI aaa to use BGP to establish BGP PWs to PE 1 and PE 3.

    [PE2] vsi aaa
    [PE2-vsi-aaa] auto-discovery bgp
    [PE2-vsi-aaa-auto] route-distinguisher 1:1
    [PE2-vsi-aaa-auto] vpn-target 1:1
    [PE2-vsi-aaa-auto] signaling-protocol bgp
    [PE2-vsi-aaa-auto-bgp] site 2 range 10 default-offset 0
    [PE2-vsi-aaa-auto-bgp] quit
    [PE2-vsi-aaa-auto] quit
    [PE2-vsi-aaa] quit
    

    # Create service instance 10 on Ten-GigabitEthernet 1/0/1 to match all packets.

    [PE2] interface ten-gigabitethernet1/0/1
    [PE2-Ten-GigabitEthernet1/0/1] service-instance 10
    [PE2-Ten-GigabitEthernet1/0/1-srv10] encapsulation default
    

    # Bind service instance 10 to the VSI aaa.

    [PE2-Ten-GigabitEthernet1/0/1-srv10] xconnect vsi aaa
    
  4. Configure PE 3:

    # Configure basic MPLS.

    <PE3> system-view
    [PE3] interface loopback 0
    [PE3-LoopBack0] ip address 3.3.3.9 32
    [PE3-LoopBack0] quit
    [PE3] mpls lsr-id 3.3.3.9
    [PE3] mpls ldp
    [PE3-ldp] quit
    

    # Establish IBGP connections to PE 1 and PE 2 and use BGP to advertise VPLS label block information.

    [PE3] bgp 100
    [PE3-bgp] peer 1.1.1.9 as-number 100
    [PE3-bgp] peer 1.1.1.9 connect-interface loopback 0
    [PE3-bgp] peer 2.2.2.9 as-number 100
    [PE3-bgp] peer 2.2.2.9 connect-interface loopback 0
    [PE3-bgp] address-family l2vpn
    [PE3-bgp-l2vpn] peer 1.1.1.9 enable
    [PE3-bgp-l2vpn] peer 2.2.2.9 enable
    [PE3-bgp-l2vpn] quit
    [PE3-bgp] quit
    

    # Enable L2VPN.

    [PE3] l2vpn enable
    

    # Configure the VSI aaa to use BGP to establish BGP PWs to PE 1 and PE 2.

    [PE3] vsi aaa
    [PE3-vsi-aaa] auto-discovery bgp
    [PE3-vsi-aaa-auto] route-distinguisher 1:1
    [PE3-vsi-aaa-auto] vpn-target 1:1
    [PE3-vsi-aaa-auto] signaling-protocol bgp
    [PE3-vsi-aaa-auto-bgp] site 3 range 10 default-offset 0
    [PE3-vsi-aaa-auto-bgp] quit
    [PE3-vsi-aaa-auto] quit
    [PE3-vsi-aaa] quit
    

    # Create service instance 10 on Ten-GigabitEthernet 1/0/1 to match all packets.

    [PE3] interface ten-gigabitethernet1/0/1
    [PE3-Ten-GigabitEthernet1/0/1] service-instance 10
    [PE3-Ten-GigabitEthernet1/0/1-srv10] encapsulation default
    

    # Bind service instance 10 to the VSI aaa.

    [PE3-Ten-GigabitEthernet1/0/1-srv10] xconnect vsi aaa
    

Verifying the configuration

# Execute the display l2vpn pw verbose command on PE 1. The output shows that two BGP PWs have been established.

[PE1] display l2vpn pw verbose
VSI Name: aaa
  Peer: 2.2.2.9          Remote Site: 2
    Signaling Protocol  : BGP
    Link ID             : 9          PW State : Up
    In Label            : 131195     Out Label: 131225
    MTU                 : 1500
    PW Attributes       : Main
    VCCV CC             : -
    VCCV BFD            : -
    Tunnel Group ID     : 0x1800000160000001
    Tunnel NHLFE IDs    : 137
  Peer: 3.3.3.9          Remote Site: 3
    Signaling Protocol  : BGP
    Link ID             : 10         PW State : Up
    In Label            : 131196     Out Label: 131225
    MTU                 : 1500
    PW Attributes       : Main
    VCCV CC             : -
    VCCV BFD            : -
    Tunnel Group ID     : 0x1800000060000000
    Tunnel NHLFE IDs    : 136

# Execute the display l2vpn bgp verbose command on PE 1 to view VPLS label block information received from PE 2 and PE 3.

[PE1] display l2vpn bgp verbose
VSI Name: aaa
 Remote Site ID     : 2
 Offset             : 0
 RD                 : 1:1
 PW State           : Up
 Encapsulation      : BGP-VPLS
 MTU                : 1500
 Nexthop            : 2.2.2.9
 Local VC Label     : 131195
 Remote VC Label    : 131225
 Link ID            : 9
 Local Label Block  : 131193/10/0
 Remote Label Block : 131224/10/0
 Export Route Target: 1:1

 Remote Site ID     : 3
 Offset             : 0
 RD                 : 1:1
 PW State           : Up
 Encapsulation      : BGP-VPLS
 MTU                : 1500
 Nexthop            : 3.3.3.9
 Local VC Label     : 131196
 Remote VC Label    : 131225
 Link ID            : 10
 Local Label Block  : 131193/10/0
 Remote Label Block : 131224/10/0
 Export Route Target: 1:1