JUNOSe 9.1.x BGP and MPLS Configuration Guide > Configuring L2VPNs > L2VPN Configuration Tasks

L2VPN Configuration Tasks

To configure a PE router to provide L2VPNs:

1. Configure an L2VPN instance.

1. Configure the encapsulation type and create an L2VPN instance on the PE router for each L2VPN in which the router participates.
2. Configure a customer site name and a unique site identifier for each customer site that belongs to the L2VPN instance.
3. Configure the maximum number of customer sites that can participate in the L2VPN.
4. Configure the unique two-part route distinguisher for the L2VPN instance.
5. Create a list of L2VPN extended communities that the router uses to determine which routes are imported by the L2VPN instance.
6. Configure the L2VPN local preference options for control words and sequencing.

2. Configure the customer-facing interfaces in the L2VPN instance.

1. Configure the layer 2 interfaces that connect the PE router to each CE device in the L2VPN.
2. Configure each layer 2 interface as a member of an L2VPN instance by specifying local and remote site IDs.

3. (Optional) Configure local cross-connects.

1. Configure two sites in the L2VPN instance that are local to the PE router.
2. Configure the correct local and remote site IDs on the customer-facing interfaces for the cross-connected sites.

4. Configure the loopback interface and router ID for BGP.

1. Configure a loopback interface to use as the update source for the TCP connection.
2. Assign a router ID that uses the IP address of the loopback interface.

5. Set up BGP signaling in the autonomous system that is configured to signal reachability for this L2VPN instance.

1. Enable BGP.
2. Configure the PE-to-PE BGP session.
3. Create the L2VPN address family to configure the router to use BGP signaling.
4. Activate the neighbors in the L2VPN address family for the PE-to-PE BGP session.
5. Create the VPWS address family to configure the router to exchange layer 2 NLRI for each L2VPN instance configured on the router.

6. Configure MPLS label-switched paths (LSPs) to connect the local and remote PE routers.

1. Enable MPLS on the virtual router.
2. Configure the core-facing interface on which you want to enable MPLS, Label Distribution Protocol (LDP), and topology-driven LSPs.
3. Enable MPLS on the core-facing interface.
4. Enable LDP and topology-driven LSPs on the core-facing interface.

Related Topics

• Configuring BGP Signaling for L2VPNs
• Configuring a Local Cross-Connect for L2VPNs
• Configuring an L2VPN Instance
• Configuring Customer-Facing Interfaces in the L2VPN Instance
• Configuring the Loopback Interface and Router ID for BGP for L2VPNs
• Configuring MPLS LSPs for L2VPNs
• For a detailed sample configuration, see L2VPN Configuration Example