L2VPN – VPLS (Pseudo Wires) Configuration Example for ZTE ZXR10 Routers

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Detailed Configuration Guide for L2VPN VPLS on ZTE ZXR10 Routing Platforms

This guide provides a comprehensive walkthrough for configuring Layer 2 Virtual Private LAN Service (VPLS) on ZTE ZXR10 routing platforms. It assumes you have a basic understanding of VPLS concepts, including PWs (Pseudo Wires), SAPs (Service Access Points), and VSI (Virtual Switching Instance).

1. Network Topology and Requirements

Before configuration, define your network topology and requirements:

• Number of Sites: Determine the number of customer sites requiring VPLS connectivity.
• Site Connectivity: Identify the access circuits (e.g., Ethernet, VLANs) connecting each site to the ZTE routers.
• MPLS Core: Ensure a functional MPLS core network with LDP or RSVP-TE enabled for PW signaling.
• VSI Identifier: Choose a unique VSI identifier for your VPLS instance.
• PW Signaling Protocol: Decide whether to use LDP or RSVP-TE for PW signaling.
• QoS Requirements: Define any specific QoS requirements for the VPLS traffic.

2. Core MPLS Configuration (If not already configured)

• Enable MPLS: Enable MPLS globally on the core-facing interfaces.
• Enable LDP or RSVP-TE: Configure LDP or RSVP-TE for PW signaling.
  • LDP: 
# configure terminal
# mpls ldp
# interface <core_interface>
# mpls ldp enable
# exit

  • RSVP-TE: (More complex, requires traffic engineering knowledge) 
# configure terminal
# mpls rsvp-te
# interface <core_interface>
# mpls rsvp-te enable
# exit

• Configure IGP (OSPF/ISIS): Ensure the IGP is configured to distribute loopback addresses used for LDP/RSVP-TE.
• Configure Loopback Interface: Assign a loopback address to each core router. This address will be used as the LDP Router ID or RSVP-TE Router ID.

3. VPLS Configuration

Create VSI:

  # configure terminal # vpls <VSI_NAME> <VSI_ID> # exit 

• <VSI_NAME>: A descriptive name for the VPLS instance.
• <VSI_ID>: A unique identifier for the VPLS instance.

Configure SAPs (Service Access Points):

• Ethernet SAP:
# configure terminal
# interface <customer_facing_interface>
# vpls <VSI_NAME> sap <SAP_ID>
# exit

  • <customer_facing_interface>: The interface connected to the customer's site.
  • <SAP_ID>: A unique identifier for the SAP within the VSI.
• VLAN SAP:

  # configure terminal # interface <customer_facing_interface>.<VLAN_ID> # vpls <VSI_NAME> sap <SAP_ID> # exit 

  • <customer_facing_interface>.<VLAN_ID>: The VLAN subinterface connected to the customer's site.

Configure PWs (Pseudo Wires):

• LDP PW:
# configure terminal
# vpls <VSI_NAME>
# pw ldp <remote_PE_loopback_address> <remote_VSI_ID>
# exit

  • <remote_PE_loopback_address>: The loopback address of the remote PE router.
  • <remote_VSI_ID>: The VSI ID of the remote VPLS instance.
• RSVP-TE PW: (More complex, requires traffic engineering knowledge)

  # configure terminal # vpls <VSI_NAME> # pw rsvp-te <LSP_NAME> <remote_PE_loopback_address> <remote_VSI_ID> # exit 

  • <LSP_NAME>: The name of the RSVP-TE LSP.

Configure Control-Word (Optional):

  # configure terminal # vpls <VSI_NAME> # control-word # exit 

• Enables the control word for PWs, which is recommended for carrying Layer 2 control protocols.

Configure Split Horizon (Optional):

  # configure terminal # vpls <VSI_NAME> # split-horizon-group <group_ID> # exit 

• Configures split horizon groups to prevent loops within the VPLS domain.

Configure QoS (Optional):

• Apply QoS policies to SAPs and PWs as required.

4. Verification

• Verify VSI Status:

  # show vpls <VSI_NAME> 

• Verify SAP Status:

  # show vpls <VSI_NAME> sap 

• Verify PW Status:

  # show vpls <VSI_NAME> pw 

• Verify LDP/RSVP-TE Sessions:

 # show mpls ldp session # show mpls rsvp-te session 

• Ping/Traceroute: Verify connectivity between customer sites by pinging or tracerouting between hosts.

Example Configuration (LDP PW)

PE1 (Loopback: 1.1.1.1, VSI ID: 100)

# configure terminal # mpls ldp # interface GigabitEthernet0/0/1 # mpls ldp enable # exit # vpls VPLS_SITE_A 100 # interface GigabitEthernet0/0/2.10 # vpls VPLS_SITE_A sap 1 # exit # pw ldp 2.2.2.2 100 # control-word # exit 

PE2 (Loopback: 2.2.2.2, VSI ID: 100)

# configure terminal # mpls ldp # interface GigabitEthernet0/0/1 # mpls ldp enable # exit # vpls VPLS_SITE_A 100 # interface GigabitEthernet0/0/2.20 # vpls VPLS_SITE_A sap 2 # exit # pw ldp 1.1.1.1 100 # control-word # exit 

Important Notes

• Replace placeholder values (e.g., interface names, IP addresses, VSI IDs) with your actual configuration details.
• This guide provides a basic configuration. More advanced features, such as QoS, security, and redundancy, may require additional configuration.
• Consult the ZTE ZXR10 documentation for specific command syntax and feature support.
• Always test your configuration in a lab environment before deploying it in a production network.
• Always save your configurations.
• Be aware of ZTE software versions, as commands can change between versions.

This detailed guide should help you configure VPLS on your ZTE ZXR10 routers. Remember to tailor the configuration to your specific network requirements.