Example for Configuring mLDP P2MP Tunnels with Dual-Root Protection

This section provides an example for configuring mLDP P2MP tunnels with dual-root protection.

Networking Requirements

On the BGP AD VPLS network shown in Figure 1, a primary mLDP P2MP tunnel rooted at PE1 and a backup mLDP P2MP tunnel rooted at PE2 are established, with PE1 as the working root node, PE2 the protection root node, and PE3 and PE4 the leaf nodes. If PE1's AC interface (GE 0/1/1) or the primary mLDP P2MP tunnel fails, service traffic can be quickly switched to the backup mLDP P2MP tunnel.

Figure 1 Configuring mLDP P2MP tunnels with dual-root protection

Table 1 Interfaces and IP addresses

Device

Interface

IP Address

PE1

GE 0/1/0

10.1.2.1/24

GE 0/1/2

10.1.3.1/24

PE2

GE 0/1/0

10.1.5.1/24

GE 0/1/2

10.1.6.1/24

PE3

GE 0/1/0

10.1.2.2/24

GE 0/1/2

10.1.6.2/24

PE4

GE 0/1/0

10.1.5.2/24

GE 0/1/2

10.1.3.2/24

Configuration Roadmap

The configuration roadmap is as follows:

  1. Configure an IP address and a routing protocol for each interface to ensure IP connectivity at the network layer. This example uses OSPF as the routing protocol.
  2. Configure an MPLS LSR ID and globally enable MPLS, MPLS LDP, and mLDP P2MP on each PE.
  3. Configure a local LDP session on each PE.
  4. Configure BGP AD VPLS on PE1, PE2, PE3, and PE4.
  5. Establish the primary and backup mLDP P2MP tunnels.
  6. Configure PE3 and PE4 as leaf nodes.

Data Preparation

To complete the configuration, you need the following data:

  • IP addresses of all interfaces listed in Table 1

  • OSPF process ID (100) and area ID (0.0.0.0) of each PE

  • BGP AS number of each PE

  • VSI name, VPLS ID, and VPN targets of each PE

  • Number of the interface bound to each VSI

Procedure

  1. Configure an IP address and a routing protocol for each interface to ensure IP connectivity at the network layer.

    For configuration details, see Configuration Files in this section.

  2. Configure an MPLS LSR ID and globally enable MPLS, MPLS LDP, and mLDP P2MP on each PE.

    # Configure PE1.

    <PE1> system-view
[~PE1] mpls lsr-id 1.1.1.1
[*PE1] mpls
[*PE1-mpls] mpls ldp
[*PE1-mpls-ldp] mldp p2mp
[*PE1-mpls-ldp] quit
[*PE1] commit

    # Configure PE2.

    <PE2> system-view
[~PE2] mpls lsr-id 2.2.2.2
[*PE2] mpls
[*PE2-mpls] mpls ldp
[*PE2-mpls-ldp] mldp p2mp
[*PE2-mpls-ldp] quit
[*PE2] commit

    # Configure PE3.

    <PE3> system-view
[~PE3] mpls lsr-id 3.3.3.3
[*PE3] mpls
[*PE3-mpls] mpls ldp
[*PE3-mpls-ldp] mldp p2mp
[*PE3-mpls-ldp] quit
[*PE3] commit

    # Configure PE4.

    <PE4> system-view
[~PE4] mpls lsr-id 4.4.4.4
[*PE4] mpls
[*PE4-mpls] mpls ldp
[*PE4-mpls-ldp] mldp p2mp
[*PE4-mpls-ldp] quit
[*PE4] commit

  3. Configure a local LDP session on each PE.

    # Configure PE1.

    [~PE1] mpls ldp
[*PE1-mpls-ldp] quit
[*PE1] interface gigabitethernet0/1/0
[*PE1-GigabitEthernet0/1/0] mpls
[*PE1-GigabitEthernet0/1/0] mpls ldp
[*PE1-GigabitEthernet0/1/0] quit
[*PE1] interface gigabitethernet0/1/2
[*PE1-GigabitEthernet0/1/2] mpls
[*PE1-GigabitEthernet0/1/2] mpls ldp
[*PE1-GigabitEthernet0/1/2] quit
[*PE1] commit

    # Configure PE2.

    [~PE2] mpls ldp
[*PE2-mpls-ldp] quit
[*PE2] interface gigabitethernet0/1/0
[*PE2-GigabitEthernet0/1/0] mpls
[*PE2-GigabitEthernet0/1/0] mpls ldp
[*PE2-GigabitEthernet0/1/0] quit
[*PE2] interface gigabitethernet0/1/2
[*PE2-GigabitEthernet0/1/2] mpls
[*PE2-GigabitEthernet0/1/2] mpls ldp
[*PE2-GigabitEthernet0/1/2] quit
[*PE2] commit

    # Configure PE3.

    [~PE3] mpls ldp
[*PE3-mpls-ldp] quit
[*PE3] interface gigabitethernet0/1/0
[*PE3-GigabitEthernet0/1/0] mpls
[*PE3-GigabitEthernet0/1/0] mpls ldp
[*PE3-GigabitEthernet0/1/0] quit
[*PE3] interface gigabitethernet0/1/2
[*PE3-GigabitEthernet0/1/2] mpls
[*PE3-GigabitEthernet0/1/2] mpls ldp
[*PE3-GigabitEthernet0/1/2] quit
[*PE3] commit

    # Configure PE4.

    [~PE4] mpls ldp
[*PE4-mpls-ldp] quit
[*PE4] interface gigabitethernet0/1/0
[*PE4-GigabitEthernet0/1/0] mpls
[*PE4-GigabitEthernet0/1/0] mpls ldp
[*PE4-GigabitEthernet0/1/0] quit
[*PE4] interface gigabitethernet0/1/2
[*PE4-GigabitEthernet0/1/2] mpls
[*PE4-GigabitEthernet0/1/2] mpls ldp
[*PE4-GigabitEthernet0/1/2] quit
[*PE4] commit

  4. Configure BGP AD VPLS on PE1, PE2, PE3, and PE4.

    # Configure PE1.

    [~PE1] bgp 100
[*PE1-bgp] peer 3.3.3.3 as-number 100
[*PE1-bgp] peer 3.3.3.3 connect-interface loopback1
[*PE1-bgp] peer 4.4.4.4 as-number 100
[*PE1-bgp] peer 4.4.4.4 connect-interface loopback1
[*PE1-bgp] l2vpn-ad-family
[*PE1-bgp-af-l2vpn-ad] peer 3.3.3.3 enable
[*PE1-bgp-af-l2vpn-ad] peer 4.4.4.4 enable
[*PE1-bgp-af-l2vpn-ad] quit
[*PE1-bgp] quit
[*PE1] mpls l2vpn
[*PE1-l2vpn] quit
[*PE1] vsi vsi1
[*PE1-vsi-vsi1] bgp-ad
[*PE1-vsi-vsi1-bgpad] vpls-id 2:2
[*PE1-vsi-vsi1-bgpad] vpn-target 2:2 import-extcommunity
[*PE1-vsi-vsi1-bgpad] vpn-target 2:2 export-extcommunity
[*PE1-vsi-vsi1-bgpad] quit
[*PE1-vsi-vsi1] quit
[*PE1] interface gigabitethernet0/1/1
[*PE1-GigabitEthernet0/1/1] l2 binding vsi vsi1
[*PE1-GigabitEthernet0/1/1] quit
[*PE1] commit

    # Configure PE2.

    [~PE2] bgp 100
[*PE2-bgp] peer 3.3.3.3 as-number 100
[*PE2-bgp] peer 3.3.3.3 connect-interface loopback1
[*PE2-bgp] peer 4.4.4.4 as-number 100
[*PE2-bgp] peer 4.4.4.4 connect-interface loopback1
[*PE2-bgp] l2vpn-ad-family
[*PE2-bgp-af-l2vpn-ad] peer 3.3.3.3 enable
[*PE2-bgp-af-l2vpn-ad] peer 4.4.4.4 enable
[*PE2-bgp-af-l2vpn-ad] quit
[*PE2-bgp] quit
[*PE2] mpls l2vpn
[*PE2-l2vpn] quit
[*PE2] vsi vsi1
[*PE2-vsi-vsi1] bgp-ad
[*PE2-vsi-vsi1-bgpad] vpls-id 2:2
[*PE2-vsi-vsi1-bgpad] vpn-target 2:2 import-extcommunity
[*PE2-vsi-vsi1-bgpad] vpn-target 2:2 export-extcommunity
[*PE2-vsi-vsi1-bgpad] quit
[*PE2-vsi-vsi1] quit
[*PE2] interface gigabitethernet0/1/1
[*PE2-GigabitEthernet0/1/1] l2 binding vsi vsi1
[*PE2-GigabitEthernet0/1/1] quit
[*PE2] commit

    # Configure PE3.

    [~PE3] bgp 100
[*PE3-bgp] peer 1.1.1.1 as-number 100
[*PE3-bgp] peer 1.1.1.1 connect-interface loopback1
[*PE3-bgp] peer 2.2.2.2 as-number 100
[*PE3-bgp] peer 2.2.2.2 connect-interface loopback1
[*PE3-bgp] l2vpn-ad-family
[*PE3-bgp-af-l2vpn-ad] peer 1.1.1.1 enable
[*PE3-bgp-af-l2vpn-ad] peer 2.2.2.2 enable
[*PE3-bgp-af-l2vpn-ad] quit
[*PE3-bgp] quit
[*PE3] mpls l2vpn
[*PE3-l2vpn] vpls p2mp group-select ldp enable
[*PE3-l2vpn] quit
[*PE3] vsi vsi1
[*PE3-vsi-vsi1] bgp-ad
[*PE3-vsi-vsi1-bgpad] vpls-id 2:2
[*PE3-vsi-vsi1-bgpad] vpn-target 2:2 import-extcommunity
[*PE3-vsi-vsi1-bgpad] vpn-target 2:2 export-extcommunity
[*PE3-vsi-vsi1-bgpad] quit
[*PE3-vsi-vsi1] quit
[*PE3] interface gigabitethernet0/1/3.1
[*PE3-GigabitEthernet0/1/3.1] vlan-type dot1q 10
[*PE3-GigabitEthernet0/1/3.1] l2 binding vsi vsi1
[*PE3-GigabitEthernet0/1/3.1] quit
[*PE3] commit

    # Configure PE4.

    [~PE4] bgp 100
[*PE4-bgp] peer 1.1.1.1 as-number 100
[*PE4-bgp] peer 1.1.1.1 connect-interface loopback1
[*PE4-bgp] peer 2.2.2.2 as-number 100
[*PE4-bgp] peer 2.2.2.2 connect-interface loopback1
[*PE4-bgp] l2vpn-ad-family
[*PE4-bgp-af-l2vpn-ad] peer 1.1.1.1 enable
[*PE4-bgp-af-l2vpn-ad] peer 2.2.2.2 enable
[*PE4-bgp-af-l2vpn-ad] quit
[*PE4-bgp] quit
[*PE4] mpls l2vpn
[*PE4-l2vpn] vpls p2mp group-select ldp enable
[*PE4-l2vpn] quit
[*PE4] vsi vsi1
[*PE4-vsi-vsi1] bgp-ad
[*PE4-vsi-vsi1-bgpad] vpls-id 2:2  
[*PE4-vsi-vsi1-bgpad] vpn-target 2:2 import-extcommunity
[*PE4-vsi-vsi1-bgpad] vpn-target 2:2 export-extcommunity
[*PE4-vsi-vsi1-bgpad] quit
[*PE4-vsi-vsi1] quit
[*PE4] interface gigabitethernet0/1/3.1
[*PE4-GigabitEthernet0/1/3.1] vlan-type dot1q 10
[*PE4-GigabitEthernet0/1/3.1] l2 binding vsi vsi1
[*PE4-GigabitEthernet0/1/3.1] quit
[*PE4] commit

  5. Configure mLDP P2MP tunnels on PE1 (working root node) and PE2 (protection root node) and configure BFD to monitor the AC interface GE 0/1/1.

    # Configure PE1.

    [~PE1] bfd
[*PE1-bfd] quit
[*PE1] vsi vsi1
[*PE1-vsi-vsi1] inclusive-provider-tunnel
[*PE1-vsi-vsi1-inclusive] root
[*PE1-vsi-vsi1-inclusive-root] data-switch disable
[*PE1-vsi-vsi1-inclusive-root] mldp p2mp
[*PE1-vsi-vsi1-inclusive-root-mldpp2mp] root-ip 1.1.1.1
[*PE1-vsi-vsi1-inclusive-root-mldpp2mp] quit
[*PE1-vsi-vsi1-inclusive-root] bfd track interface gigabitethernet 0/1/1
[*PE1-vsi-vsi1-inclusive-root] quit
[*PE1-vsi-vsi1-inclusive] quit
[*PE1-vsi-vsi1] quit
[*PE1] commit

    # Configure PE2.

    [~PE2] bfd
[*PE2-bfd] quit
[*PE2] vsi vsi1
[*PE2-vsi-vsi1] inclusive-provider-tunnel
[*PE2-vsi-vsi1-inclusive] root
[*PE2-vsi-vsi1-inclusive-root] data-switch disable
[*PE2-vsi-vsi1-inclusive-root] mldp p2mp
[*PE2-vsi-vsi1-inclusive-root-mldpp2mp] root-ip 2.2.2.2
[*PE2-vsi-vsi1-inclusive-root-mldpp2mp] quit
[*PE2-vsi-vsi1-inclusive-root] bfd track interface gigabitethernet 0/1/1
[*PE2-vsi-vsi1-inclusive-root] quit
[*PE2-vsi-vsi1-inclusive] quit
[*PE2-vsi-vsi1] quit
[*PE2] commit

  6. Configure PE3 and PE4 as leaf nodes and specify the primary and backup mLDP P2MP tunnels.

    # Configure PE3.

    [~PE3] bfd
[*PE3-bfd] quit
[*PE3] vsi vsi1
[*PE3-vsi-vsi1] inclusive-provider-tunnel
[*PE3-vsi-vsi1-inclusive] leaf
[*PE3-vsi-vsi1-inclusive-leaf] primary-root 1.1.1.1 track bfd backup-root 2.2.2.2 track bfd
[*PE3-vsi-vsi1-inclusive-leaf] quit
[*PE3-vsi-vsi1-inclusive] quit
[*PE3-vsi-vsi1] quit
[*PE3] commit

    # Configure PE4.

    [~PE4] bfd
[*PE4-bfd] quit
[*PE4] vsi vsi1
[*PE4-vsi-vsi1] inclusive-provider-tunnel
[*PE4-vsi-vsi1-inclusive] leaf
[*PE4-vsi-vsi1-inclusive-leaf] primary-root 1.1.1.1 track bfd backup-root 2.2.2.2 track bfd
[*PE4-vsi-vsi1-inclusive-leaf] quit
[*PE4-vsi-vsi1-inclusive] quit
[*PE4-vsi-vsi1] quit
[*PE4] commit

  7. Configure BFD for mLDP P2MP on the PEs.

    # Configure PE1.

    [~PE1] bfd
[*PE1-bfd] quit
[*PE1] commit
[~PE1] mpls
[*PE1-mpls] mpls mldp bfd enable
[*PE1-mpls] mpls mldp p2mp bfd-trigger-tunnel all
[*PE1-mpls] quit
[*PE1] commit

    # Configure PE2.

    [~PE2] bfd
[*PE2-bfd] quit
[*PE2] commit
[~PE2] mpls
[*PE2-mpls] mpls mldp bfd enable
[*PE2-mpls] mpls mldp p2mp bfd-trigger-tunnel all
[*PE2-mpls] quit
[*PE2] commit

    # Configure PE3.

    [~PE3] bfd
[*PE3-bfd] quit
[*PE3] commit
[~PE3] mpls
[*PE3-mpls] mpls mldp bfd enable
[*PE3-mpls] mpls mldp p2mp bfd-trigger-tunnel all
[*PE3-mpls] quit
[*PE3] commit

    # Configure PE4.

    [~PE4] bfd
[*PE4-bfd] quit
[*PE4] commit
[~PE4] mpls
[*PE4-mpls] mpls mldp bfd enable
[*PE4-mpls] mpls mldp p2mp bfd-trigger-tunnel all
[*PE4-mpls] quit
[*PE4] commit

  8. Verify the configuration.

    After completing the configurations, run the display vsi name inclusive-provider-tunnel command on PE1 to check mLDP P2MP tunnel information.

    [~PE1]display vsi name vsi1 inclusive-provider-tunnel
VSI name: vsi1
  Ingress provider tunnel
    PMSI type      : P2MP mLDP
    Root ip        : 1.1.1.1
    Opaque value   : 01000400002001
    State         : up
    Leaf list count: 2
    Leaf list      : 3.3.3.3
                     4.4.4.4
  Egress provider tunnel
  Egress PMSI count: 0

Configuration Files

  • PE1 configuration file

    #
sysname PE1
#
bfd
#
mpls lsr-id 1.1.1.1
#
mpls
 mpls mldp bfd enable
 mpls mldp p2mp bfd-trigger-tunnel all
#
mpls l2vpn
#
vsi vsi1
 bgp-ad
  vpls-id 2:2
  vpn-target 2:2 import-extcommunity
  vpn-target 2:2 export-extcommunity
 inclusive-provider-tunnel
  root
   data-switch disable
   bfd track interface GigabitEthernet0/1/1
   mldp p2mp
    root-ip 1.1.1.1
#
mpls ldp
 mldp p2mp
#                                                                            
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.2.1 255.255.255.0        
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/1
 undo shutdown
 l2 binding vsi vsi1
#
interface GigabitEthernet0/1/2
 undo shutdown                            
 ip address 10.1.3.1 255.255.255.0        
 mpls
 mpls ldp
#
interface LoopBack1
 ip address 1.1.1.1 255.255.255.255
#
bgp 100
 peer 3.3.3.3 as-number 100
 peer 3.3.3.3 connect-interface LoopBack1 
 peer 4.4.4.4 as-number 100
 peer 4.4.4.4 connect-interface LoopBack1 
 #
 l2vpn-ad-family
  peer 3.3.3.3 enable
  peer 4.4.4.4 enable
 #
ospf 100                                  
 area 0.0.0.0                             
  network 1.1.1.1 0.0.0.0                 
  network 10.1.2.0 0.0.0.255              
  network 10.1.3.0 0.0.0.255
#
return

  • PE2 configuration file

    #
sysname PE2
#
bfd
#
mpls lsr-id 2.2.2.2
#
mpls
 mpls mldp bfd enable
 mpls mldp p2mp bfd-trigger-tunnel all
#
mpls l2vpn
#
vsi vsi1
 bgp-ad
  vpls-id 2:2
  vpn-target 2:2 import-extcommunity
  vpn-target 2:2 export-extcommunity
 inclusive-provider-tunnel
  root
   data-switch disable
   bfd track interface GigabitEthernet0/1/1
   mldp p2mp
    root-ip 2.2.2.2
#
mpls ldp
 mldp p2mp
#                                                                            
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.5.1 255.255.255.0        
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/1
 undo shutdown
 l2 binding vsi vsi1
#
interface GigabitEthernet0/1/2
 undo shutdown
 ip address 10.1.6.1 255.255.255.0        
 mpls
 mpls ldp
#
interface LoopBack1
 ip address 2.2.2.2 255.255.255.255
#
bgp 100
 peer 3.3.3.3 as-number 100
 peer 3.3.3.3 connect-interface LoopBack1 
 peer 4.4.4.4 as-number 100
 peer 4.4.4.4 connect-interface LoopBack1 
 #
 l2vpn-ad-family
  peer 3.3.3.3 enable
  peer 4.4.4.4 enable
 #
ospf 100                                  
 area 0.0.0.0                             
  network 2.2.2.2 0.0.0.0                 
  network 10.1.5.0 0.0.0.255              
  network 10.1.6.0 0.0.0.255
#
return

  • PE3 configuration file

    #
sysname PE3
#
bfd
#
mpls lsr-id 3.3.3.3
#
mpls
 mpls mldp bfd enable
 mpls mldp p2mp bfd-trigger-tunnel all
#
mpls l2vpn
 vpls p2mp group-select ldp enable
#
vsi vsi1
 bgp-ad
  vpls-id 2:2
  vpn-target 2:2 import-extcommunity
  vpn-target 2:2 export-extcommunity
 inclusive-provider-tunnel
  leaf
   primary-root 1.1.1.1 track bfd backup-root 2.2.2.2 track bfd
#
mpls ldp
 mldp p2mp
#
interface GigabitEthernet0/1/0
 undo shutdown                            
 ip address 10.1.2.2 255.255.255.0        
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/2
 undo shutdown                            
 ip address 10.1.6.2 255.255.255.0        
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/3.1
 vlan-type dot1q 10  
 l2 binding vsi vsi1
#
interface LoopBack1
 ip address 3.3.3.3 255.255.255.255
#
bgp 100 
 peer 1.1.1.1 as-number 100
 peer 1.1.1.1 connect-interface LoopBack1 
 peer 2.2.2.2 as-number 100
 peer 2.2.2.2 connect-interface LoopBack1
#
 l2vpn-ad-family
  peer 1.1.1.1 enable
  peer 2.2.2.2 enable
 #
ospf 100                                  
 area 0.0.0.0                             
  network 3.3.3.3 0.0.0.0                 
  network 10.1.2.0 0.0.0.255
  network 10.1.6.0 0.0.0.255
#                                         
return

  • PE4 configuration file

    #
sysname PE4
#
bfd
#
mpls lsr-id 4.4.4.4
#
mpls
 mpls mldp bfd enable
 mpls mldp p2mp bfd-trigger-tunnel all
#
mpls l2vpn
 vpls p2mp group-select ldp enable
#
mpls ldp
 mldp p2mp
#
vsi vsi1
 bgp-ad
  vpls-id 2:2
  vpn-target 2:2 import-extcommunity
  vpn-target 2:2 export-extcommunity
 inclusive-provider-tunnel
  leaf
   primary-root 1.1.1.1 track bfd backup-root 2.2.2.2 track bfd

#
interface GigabitEthernet0/1/0
 undo shutdown                            
 ip address 10.1.5.2 255.255.255.0        
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/2
 undo shutdown                            
 ip address 10.1.3.2 255.255.255.0        
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/3.1
 vlan-type dot1q 10  
 l2 binding vsi vsi1
#
interface LoopBack1
 ip address 4.4.4.4 255.255.255.255
#
bgp 100 
 peer 1.1.1.1 as-number 100
 peer 1.1.1.1 connect-interface LoopBack1 
 peer 2.2.2.2 as-number 100
 peer 2.2.2.2 connect-interface LoopBack1 
 #
 l2vpn-ad-family
  peer 1.1.1.1 enable
  peer 2.2.2.2 enable
#
ospf 100                                  
 area 0.0.0.0                             
  network 4.4.4.4 0.0.0.0                 
  network 10.1.5.0 0.0.0.255    
  network 10.1.3.0 0.0.0.255    
#                                         
return
Parent Topic: Configuration Examples for VPLS
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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