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L2K (Layer2-Kompella) VPN

The L2K (Layer2 Kompella) VPN, based on the IETF Kompella draft, is implemented by Juniper only. To configure a L2K VPN, the user would perform the following sequence of steps:

  1. Bring up the Add VPN window and selecting Layer 2 Kompella. Then type in a name for the VPN (e.g. L2Kompella_3).
  2. Click on Next to bring up the Common Properties window where you can assign the Route Distinguisher, Route Target Exports, and Route Target Imports for the chosen AS and PEs. The program automatically recommends values based on the chosen AS or you may provide your own.
    Figure 1: For the chosen AS, select RD, RT, and two PEsConfiguration window for Layer 2 VPN setup using Kompella method. Title: Add VPN - L2Kompella_3. AS: 65301. RD: 65301:65018. Export/Import: 65301:65018. Selected devices: D_PE_RT02, E_PE_RT02.
  3. Click on Next to bring up the following window where you would identify PEs and assign the PE facing CE interfaces (in the same manner as described under the L3 (Layer 3) VPN section). The following figure shows the result of the assignment of the interfaces.
    Figure 2: Interfaces have been assigned to the PEsNetwork configuration interface for Layer 2 VPN using Kompella method. Shows PE routers D_PE_RT02 and E_PE_RT02 connected via AS65017. Displays exports and imports as 65301:65017 and lists available devices in AS 57301. Includes interfaces on E_PE_RT02 with details like interface names, IP addresses, and VRF names. Navigation buttons are at the bottom.
  4. Next, click on the Details tab to specify the Encapsulation, Site, Site Identifier. Optionally, you may also specify the Transmit LSP and the Receive LSP. The following figure shows that Site, Site Identifier, and Encapsulation have been assigned.
    Figure 3: Details tab showing the completed assignment of Site, Site ID, and EncapsulationLayer 2 VPN setup interface using Kompella method with fields for VRF, encapsulation, interface, CE, site ID, RD, and protocol options.

    Note that the Encapsulation drop-down can take on the values as described in the following table.

    Field

    Description

    Encapsulation

    For Juniper, the interface encapsulation types include: aal0, atm-aal5, atm-ccc-vc-mux, atm-cell, atm-cell-port-mode, atm-cell-vc-mode, atm-cell-vp-mode, cisco-hdlc, ethernet, ethernet-vlan, frame, frame-relay, frame-relay-ccc, interworking, and ppp.
  5. Finally, click on Finish to complete the adding of the L2K VPN.
    Figure 4: Newly added L2K VPNScreenshot of a network management tool showing Layer 2 Kompella VPN configuration with details on VPN Topology, endpoints, interfaces, and route targets.