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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 Layer 2 VPN setup using Kompella method. Title Add VPN - L2Kompella_3. AS number 65301. Route Distinguisher and import/export target 65301:65018. Selected devices D_PE_RT02 and E_PE_RT02. Navigation buttons Back, Next, Cancel, Help.
  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 adding Layer 2 VPN L2Komppella_3. PE Selection Panel lists routers D_PE_RT02 and E_PE_RT02 with interfaces. Network Diagram shows topology with AS65017. Exports and Imports are 65301:65017. Available Devices list with AS 57301. E_PE_RT02 interfaces table displays interface names, IP addresses, VRF details, and connected devices. Action Buttons: Back, Finish, Cancel, Help.
  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 L2Kompella_3 with tabs for PE Selection and Details, fields for VRF, Encapsulation, Interface, Site Identifier, RD, and Protocol, and buttons for Back, Finish, Cancel, and Help.

    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 VPNNetwork management interface showing Layer 2 Kompella VPN configuration for L2Kompella_3 with nodes, interfaces, RD, and targets.