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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 interface for setting up Layer 2 VPN using Kompella method; AS number 65301; RD 65301:65018; Devices C_PE_RT01 and D_PE_RT02 selected; Navigation buttons available.
  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 PEsLayer 2 VPN configuration screen using Kompella method showing network topology with PE routers D_PE_RT02 and E_PE_RT02 in AS65017, selected interfaces, and export-import route targets.
  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 EncapsulationConfiguration interface for adding Layer 2 VPN using Kompella method with endpoints Node A D_PE_RT02 and Node Z E_PE_RT02 using ethernet-vlan encapsulation.

    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 VPNGraphical interface for managing Layer 2 Kompella VPNs showing VPN list on left and selected VPN details like nodes, interfaces, and routing on right.