Example for Configuring ERPS over VPLS in Scenarios Where a CE Is Dual-Homed to PEs Through Ethernet Sub-interfaces

To configure ERPS over VPLS in scenarios where a CE is dual-homed to PEs through Ethernet sub-interfaces, enable ERPS on PE1, PE2, and the CE and configure ERPS to access the VPLS network in non-virtual channel (NVC) mode. Using Ethernet sub-interfaces to access the VPLS network must have the TC notification function enabled so that the VPLS network can have ARP and MAC address entries updated promptly after receiving TC packets. This function, however, does not need to be enabled when VLANIF interfaces are used for VPLS network access.

Networking Requirements

On the VPLS network shown in Figure 1, a CE is dual-homed to PE1 and PE2. In this networking scenario, PE3 receives two copies of CE traffic from PE1 and PE2. To prevent this problem, enable ERPS on PE1, PE2, and the CE and configure the CE's GE 0/1/8 as an RPL owner port to block traffic sending from this port. In this way, the CE's traffic is directly sent to PE3 through PE2, thereby preventing any duplicate traffic or loop.

The ERPS ring shown in Figure 1 is connected to a VPLS ring through Ethernet sub-interfaces.

Figure 1 Configuring ERPS over VPLS in scenarios where a CE is dual-homed to PEs through Ethernet sub-interfaces

Interfaces 1 through 3 in this example represent GE 0/1/0, GE 0/1/8, and GE 0/1/16, respectively.


  • The configurations of ERPS over VPLS in CE single-homing scenarios are similar to those in CE dual-homing scenarios. This section uses CE dual-homing scenarios as an example.

  • If an ERPS ring has revertive switching enabled and an AC interface recovers, it is not recommended that you use the clear command to trigger revertive switching before the wait to restore (WTR) or wait to block (WTB) timer expires. If you do so and the VSI bound to the AC interface recovers later than the AC interface, traffic will be interrupted for a long time.

Device

Interface

IP Address

PE1

GE 0/1/0

--

GE 0/1/8

10.1.1.1/24

GE 0/1/16

10.3.1.1/24

Loopback 1

1.1.1.1/32

PE2

GE 0/1/0

--

GE 0/1/8

10.2.1.1/24

GE 0/1/16

10.3.1.2/24

Loopback 1

2.2.2.2/32

PE3

GE 0/1/0

10.1.1.2/24

GE 0/1/8

10.2.1.2/24

Loopback 1

3.3.3.3/32

Configuration Roadmap

The configuration roadmap is as follows:

  1. Configure an IGP on the VPLS backbone network to allow the PEs to communicate.

  2. Configure basic MPLS functions and establish LDP LSPs on the VPLS backbone network.

  3. Establish a VPLS connection between every two PEs and bind each Ethernet sub-interface to a VSI.

  4. Configure ERPS.

    • Enable ERPS on PE1, PE2, and the CE.
    • Configure an RPL owner port.

Data Preparation

To complete the configuration, you need the following data:

  • Data needed for configuring OSPF: IP address of each interface, OSPF process ID, and OSPF domain ID

  • MPLS LSR IDs (used as peer addresses)

  • VSI names and VSI IDs

  • Names of the Ethernet sub-interfaces bound to VSIs

  • ERPS ring ID, control VLAN ID, and RPL owner port number

Procedure

  1. Configure interface IP addresses and an IGP on the VPLS backbone network to allow PEs to communicate. This example uses OSPF as the IGP.

    When configuring OSPF, configure PE1, PE2, and PE3 to advertise their 32-bit IP addresses (used as LSR IDs) of loopback interfaces.

    For configuration details, see Configuration Files in this section.

  2. Configure basic MPLS functions and establish dynamic LDP LSPs between every two PEs.

    # Configure PE1.

    [~PE1] mpls lsr-id 1.1.1.1
[*PE1] mpls
[*PE1-mpls] quit
[*PE1] mpls ldp
[*PE1-mpls-ldp] quit
[*PE1] interface gigabitethernet 0/1/8
[*PE1-GigabitEthernet0/1/8] mpls
[*PE1-GigabitEthernet0/1/8] mpls ldp
[*PE1-GigabitEthernet0/1/8] quit
[*PE1] interface gigabitethernet 0/1/16
[*PE1-GigabitEthernet0/1/16] mpls
[*PE1-GigabitEthernet0/1/16] mpls ldp
[*PE1-GigabitEthernet0/1/16] quit
[*PE1] commit

    # Configure PE2.

    [~PE2] mpls lsr-id 2.2.2.2
[*PE2] mpls
[*PE2-mpls] quit
[*PE2] mpls ldp
[*PE2-mpls-ldp] quit
[*PE2] interface gigabitethernet 0/1/8
[*PE2-GigabitEthernet0/1/8] mpls
[*PE2-GigabitEthernet0/1/8] mpls ldp
[*PE2-GigabitEthernet0/1/8] quit
[*PE2] interface gigabitethernet 0/1/16
[*PE2-GigabitEthernet0/1/16] mpls
[*PE2-GigabitEthernet0/1/16] mpls ldp
[*PE2-GigabitEthernet0/1/16] quit
[*PE2] commit

    # Configure PE3.

    [~PE3] mpls lsr-id 3.3.3.3
[*PE3] mpls
[*PE3-mpls] quit
[*PE3] mpls ldp
[*PE3-mpls-ldp] quit
[*PE3] interface gigabitethernet 0/1/0
[*PE3-gigabitethernet0/1/0] mpls
[*PE3-gigabitethernet0/1/0] mpls ldp
[*PE3-gigabitethernet0/1/0] quit
[*PE3] interface gigabitethernet 0/1/8
[*PE3-GigabitEthernet0/1/8] mpls
[*PE3-GigabitEthernet0/1/8] mpls ldp
[*PE3-GigabitEthernet0/1/8] quit
[*PE3] commit

  3. Enable MPLS L2VPN on each PE.

    # Configure PE1.

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

    # Configure PE2.

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

    # Configure PE3.

    [~PE3] mpls l2vpn
[*PE3-l2vpn] commit
[~PE3-l2vpn] quit

  4. Configure VPLS.

    # Configure PE1.

    [~PE1] vsi s1 static
[*PE1-vsi-s1] pwsignal ldp
[*PE1-vsi-s1-ldp] vsi-id 10
[*PE1-vsi-s1-ldp] peer 2.2.2.2
[*PE1-vsi-s1-ldp] peer 3.3.3.3
[*PE1-vsi-s1-ldp] quit
[*PE1-vsi-s1] quit
[*PE1] commit
[~PE1] vlan 10
[*PE1-vlan10] quit
[*PE1] interface gigabitethernet 0/1/0.1
[*PE1-GigabitEthernet0/1/0.1] shutdown
[*PE1-GigabitEthernet0/1/0.1] vlan-type dot1q 10
[*PE1-GigabitEthernet0/1/0.1] l2 binding vsi s1
[*PE1-GigabitEthernet0/1/0.1] undo shutdown
[*PE1-GigabitEthernet0/1/0.1] quit
[*PE1] commit

    # Configure PE2.

    [~PE2] vsi s1 static
[*PE2-vsi-s1] pwsignal ldp
[*PE2-vsi-s1-ldp] vsi-id 10
[*PE2-vsi-s1-ldp] peer 1.1.1.1
[*PE2-vsi-s1-ldp] peer 3.3.3.3
[*PE2-vsi-s1-ldp] quit
[*PE2-vsi-s1] quit
[*PE2] commit
[~PE2] vlan 10
[*PE2-vlan10] quit
[*PE2] interface gigabitethernet 0/1/0.1
[*PE2-GigabitEthernet0/1/0.1] shutdown
[*PE2-GigabitEthernet0/1/0.1] vlan-type dot1q 10
[*PE2-GigabitEthernet0/1/0.1] l2 binding vsi s1
[*PE2-GigabitEthernet0/1/0.1] undo shutdown
[*PE2-GigabitEthernet0/1/0.1] quit
[*PE2] commit

    # Configure PE3.

    [~PE3] vsi s1 static
[*PE3-vsi-s1] pwsignal ldp
[*PE3-vsi-s1-ldp] vsi-id 10
[*PE3-vsi-s1-ldp] peer 1.1.1.1
[*PE3-vsi-s1-ldp] peer 2.2.2.2
[*PE3-vsi-s1-ldp] quit
[*PE3-vsi-s1] quit
[*PE3] commit

  5. Configure ERPS on PE1, PE2, and the CE.

    # Configure PE1. The specified service VLAN ID and instance ID must be mapped to trigger ERPS and VPLS association.

    [~PE1] stp region-configuration
[*PE1-mst-region] instance 0 vlan 10 100
[*PE1-mst-region] commit
[~PE1-mst-region] quit
[~PE1] erps ring 1
[*PE1-erps-ring1] control-vlan 100
[*PE1-erps-ring1] protected-instance 0
[*PE1-erps-ring1] version v2
[*PE1-erps-ring1] sub-ring
[*PE1-erps-ring1] quit
[*PE1] commit
[~PE1] interface gigabitethernet 0/1/0
[*PE1-gigabitethernet0/1/0] undo shutdown
[*PE1-gigabitethernet0/1/0] portswitch
[*PE1-gigabitethernet0/1/0] port link-type trunk
[*PE1-gigabitethernet0/1/0] port trunk allow-pass vlan 100
[*PE1-gigabitethernet0/1/0] stp disable
[*PE1-gigabitethernet0/1/0] erps ring 1
[*PE1-GigabitEthernet0/1/0] erps vpls-subinterface enable
[*PE1-gigabitethernet0/1/0] commit
[~PE1-gigabitethernet0/1/0] quit

    # Configure PE2. The specified service VLAN ID and instance ID must be mapped to trigger ERPS and VPLS association.

    [~PE2] stp region-configuration
[*PE2-mst-region] instance 0 vlan 10 100
[*PE2-mst-region] commit
[~PE2-mst-region] quit
[~PE2] erps ring 1
[*PE2-erps-ring1] control-vlan 100
[*PE2-erps-ring1] protected-instance 0
[*PE2-erps-ring1] version v2
[*PE2-erps-ring1] sub-ring
[*PE2-erps-ring1] quit
[*PE2] commit
[~PE2] interface gigabitethernet 0/1/0
[*PE2-gigabitethernet0/1/0] undo shutdown
[*PE2-gigabitethernet0/1/0] portswitch
[*PE2-gigabitethernet0/1/0] port link-type trunk
[*PE2-gigabitethernet0/1/0] port trunk allow-pass vlan 100
[*PE2-gigabitethernet0/1/0] stp disable
[*PE2-gigabitethernet0/1/0] erps ring 1
[*PE2-GigabitEthernet0/1/0] erps vpls-subinterface enable
[*PE2-gigabitethernet0/1/0] commit
[~PE2-gigabitethernet0/1/0] quit

    # Configure the CE.

    <HUAWEI> system-view
[~HUAWEI] sysname CE
[*HUAWEI] commit
[~CE] stp region-configuration
[*CE-mst-region] instance 0 vlan 10 100
[*CE-mst-region] commit
[~CE-mst-region] quit
[~CE] erps ring 1
[*CE-erps-ring1] control-vlan 100
[*CE-erps-ring1] protected-instance 0
[*CE-erps-ring1] version v2
[*CE-erps-ring1] sub-ring
[*CE-erps-ring1] quit
[*CE] commit
[~CE] interface gigabitethernet 0/1/0
[*CE-gigabitethernet0/1/0] undo shutdown
[*CE-gigabitethernet0/1/0] portswitch
[*CE-gigabitethernet0/1/0] port link-type trunk
[*CE-gigabitethernet0/1/0] port trunk allow-pass vlan 10
[*CE-gigabitethernet0/1/0] stp disable
[*CE-gigabitethernet0/1/0] erps ring 1
[*CE-gigabitethernet0/1/0] commit
[~CE-gigabitethernet0/1/0] quit
[~CE] interface gigabitethernet 0/1/8
[*CE-gigabitethernet0/1/8] shutdown
[*CE-gigabitethernet0/1/8] portswitch
[*CE-gigabitethernet0/1/8] port link-type trunk
[*CE-gigabitethernet0/1/8] port trunk allow-pass vlan 10
[*CE-gigabitethernet0/1/8] stp disable
[*CE-gigabitethernet0/1/8] erps ring 1 rpl owner
[*CE-gigabitethernet0/1/8] commit
[~CE-gigabitethernet0/1/8] quit

  6. Verify the configuration.

    After the configurations are complete, run the display vsi name s1 verbose command on PE3. The command output shows that PE3 has established two PWs: one with PE1 (1.1.1.1), one with PE2 (2.2.2.2.).

    [~PE3] display vsi name s1 verbose
 ***VSI Name               : s1
    Work Mode              : normal
    Administrator VSI      : no
    Isolate Spoken         : disable
    VSI Index              : 2
    PW Signaling           : ldp
    Member Discovery Style : static
    Bridge-domain Mode     : disable
    PW MAC Learn Style     : unqualify
    Encapsulation Type     : vlan
    MTU                    : 1500
    Diffserv Mode          : uniform
    Service Class          : --
    Color                  : --
    DomainId               : 255
    Domain Name            :
    Ignore AcState         : disable
    P2P VSI                : disable
    Multicast Fast Swicth  : disable
    Create Time            : 0 days, 1 hours, 19 minutes, 38 seconds
    VSI State              : up
    Resource Status        : Valid

    VSI ID                 : 10
   *Peer Router ID         : 1.1.1.1
    primary or secondary   : primary
    ignore-standby-state   : no
    VC Label               : 32891
    Peer Type              : dynamic
    Session                : up
    Tunnel ID              : 0x0000000001004c4b41 
    Broadcast Tunnel ID    : --
    Broad BackupTunnel ID  : -- 
    CKey                   : 2
    NKey                   : 1862271177
    Stp Enable             : 0
    PwIndex                : 1
    Control Word           : disable
   *Peer Router ID         : 2.2.2.2
    primary or secondary   : primary
    ignore-standby-state   : no
    VC Label               : 32892
    Peer Type              : dynamic
    Session                : up
    Tunnel ID              : 0x0000000001004c4b42 
    Broadcast Tunnel ID    : --
    Broad BackupTunnel ID  : -- 
    CKey                   : 2
    NKey                   : 1862271178
    Stp Enable             : 0
    PwIndex                : 2
    Control Word           : disable
 
  **PW Information:

   *Peer Ip Address        : 1.1.1.1
    PW State               : up
    Local VC Label         : 32891
    Remote VC Label        : 32890
    Remote Control Word    : disable
    PW Type                : label
    Tunnel ID              : 0x0000000001004c4b41 
    Broadcast Tunnel ID    : --
    Broad BackupTunnel ID  : --
    Ckey                   : 2
    Nkey                   : 1862271177
    Main PW Token          : 0x0
    Slave PW Token         : 0x0
    Tnl Type               : ldp
    OutInterface           : LDP LSP
    Backup OutInterface    : --
    Stp Enable             : 0
    Mac Flapping           : 0
    PW Last Up Time        : 2013/12/26 17:35:12
    PW Total Up Time       : 0 days, 1 hours, 19 minutes, 38 seconds  
   *Peer Ip Address        : 2.2.2.2
    PW State               : up
    Local VC Label         : 32892
    Remote VC Label        : 32893
    Remote Control Word    : disable
    PW Type                : label
    Tunnel ID              : 0x0000000001004c4b42 
    Broadcast Tunnel ID    : --
    Broad BackupTunnel ID  : --
    Ckey                   : 2
    Nkey                   : 1862271178
    Main PW Token          : 0x0
    Slave PW Token         : 0x0
    Tnl Type               : ldp
    OutInterface           : LDP LSP
    Backup OutInterface    : --
    Stp Enable             : 0
    Mac Flapping           : 0
    PW Last Up Time        : 2013/12/28 10:35:45
    PW Total Up Time       : 0 days, 1 hours, 19 minutes, 45 seconds

    Run the display erps command on the CE. The command output shows that the link between the CE and PE1 is blocked.

    [~CE] display erps
D  : Discarding
F  : Forwarding
R  : RPL Owner
N  : RPL Neighbour
FS : Forced Switch
MS : Manual Switch
Total number of rings configured = 1
Ring  Control  WTR Timer  Guard Timer  Port 1              Port 2
ID    VLAN     (min)      (csec)
--------------------------------------------------------------------------------
   1       100         5          200  (F)GE0/1/0          (D,R)GE0/1/8
--------------------------------------------------------------------------------

Configuration Files

  • PE1 configuration file

    #
sysname PE1
#
vlan batch 10 100
#
stp region-configuration
 instance 0 vlan 10 100
#
erps ring 1
 control-vlan 100
 protected-instance 0
 version v2
 sub-ring
#
mpls lsr-id 1.1.1.1
#
mpls
#
mpls l2vpn
#
vsi s1 static
 pwsignal ldp
  vsi-id 10
  peer 2.2.2.2
  peer 3.3.3.3
#
mpls ldp
#
interface GigabitEthernet0/1/0
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 100 
 stp disable
 erps ring 1
 erps vpls-subinterface enable
#
interface GigabitEthernet0/1/0.1
 vlan-type dot1q 10
 l2 binding vsi s1
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 10.1.1.1 255.255.255.0
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/16
 undo shutdown
 ip address 10.3.1.1 255.255.255.0
 mpls
 mpls ldp
#
interface LoopBack1
 ip address 1.1.1.1 255.255.255.255
#
ospf 1
 area 0.0.0.0
  network 1.1.1.1 0.0.0.0
  network 10.1.1.0 0.0.0.255
  network 10.3.1.0 0.0.0.255
#
return

  • PE2 configuration file

    #
sysname PE2
#
vlan batch 10 100
#
stp region-configuration
 instance 0 vlan 10 100
#
erps ring 1
 control-vlan 100
 protected-instance 0
 version v2
 sub-ring
#
mpls lsr-id 2.2.2.2
#
mpls
#
mpls l2vpn
#
vsi s1 static
 pwsignal ldp
  vsi-id 10
  peer 1.1.1.1
  peer 3.3.3.3
#
mpls ldp
#
interface GigabitEthernet0/1/0
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 100
 stp disable
 erps ring 1
 erps vpls-subinterface enable
#
interface GigabitEthernet0/1/0.1
 vlan-type dot1q 10
 l2 binding vsi s1
#
interface GigabitEthernet0/1/8
 undo shutdown
 ip address 10.2.1.1 255.255.255.0
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/16
 undo shutdown
 ip address 10.3.1.2 255.255.255.0
 mpls
 mpls ldp
#
interface LoopBack1
 ip address 2.2.2.2 255.255.255.255
#
ospf 1
 area 0.0.0.0
  network 2.2.2.2 0.0.0.0
  network 10.2.1.0 0.0.0.255
  network 10.3.1.0 0.0.0.255
#
return

  • PE3 configuration file

    #
sysname PE3
#
mpls lsr-id 3.3.3.3
#
mpls
#
mpls l2vpn
#
vsi s1 static
 pwsignal ldp
  vsi-id 10
  peer 1.1.1.1
  peer 2.2.2.2
#
mpls ldp
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.1.2 255.255.255.0
 mpls
 mpls ldp
#
interface GigabitEthernet0/1/8
 ip address 10.2.1.2 255.255.255.0
 mpls
 mpls ldp
#
interface LoopBack1
 ip address 3.3.3.3 255.255.255.255
#
ospf 1
 area 0.0.0.0
  network 3.3.3.3 0.0.0.0
  network 10.1.1.0 0.0.0.255
  network 10.2.1.0 0.0.0.255
#
return

  • CE configuration file

    #
sysname CE
#
vlan batch 10 100
#
stp region-configuration
 instance 0 vlan 10 100
#
erps ring 1
 control-vlan 100
 protected-instance 0
 version v2
 sub-ring
#
interface GigabitEthernet0/1/0
 portswitch
 undo shutdown
 port link-type trunk
 port trunk allow-pass vlan 10 100
 stp disable
 erps ring 1
#
interface GigabitEthernet0/1/8
 portswitch
 shutdown
 port link-type trunk
 port trunk allow-pass vlan 10 100
 stp disable
 erps ring 1 rpl owner
#
return
Parent Topic: Configuration Examples for VPLS
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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