You can configure LDP as the signaling protocol for a VPLS routing instance. This functionality is described in RFC 4762, Virtual Private LAN Service (VPLS) Using Label Distribution Protocol (LDP) Signaling.
The JUNOS software does not support all of RFC 4762. When enabling LDP signaling for a VPLS routing instance, network engineers should be aware that only the following values are supported:
To enable LDP signaling for the set of PE routers participating in the same VPLS routing instance, you need to use the vpls-id statement configured at the [edit routing-instances routing-instance-name protocols vpls] hierarchy level to configure the same VPLS identifier on each of the PE routers. The VPLS identifier must be globally unique. When each VPLS routing instance (domain) has a unique VPLS identifier, it is possible to configure multiple VPLS routing instances between a given pair of PE routers.
LDP signaling requires that you configure a full-mesh LDP session between the PE routers in the same VPLS routing instance. Neighboring PE routers are statically configured. Tunnels are created between the neighboring PE routers to aggregate traffic from one PE router to another. Pseudowires are then signaled to demultiplex traffic between VPLS routing instances. These PE routers exchange the pseudowire label, the MPLS label that acts as the VPLS pseudowire demultiplexer field, by using LDP forwarding equivalence classes (FECs). Tunnels based on both MPLS and generic routing encapsulation (GRE) are supported.
 |
Note: You cannot configure both BGP signaling and LDP signaling for the same VPLS routing instance. If you attempt to configure the statements that enable BGP signaling for the VPLS routing instance (the site, site-identifier, and site-range statements), and the statements that enable LDP signaling for the same instance, neighbor and vpls-id, the commit operation fails. |
To enable LDP signaling for the VPLS routing instance, complete the steps in the following sections:
 | Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |