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Configuring Routing Protocols on the PE and Core Routers

 

At a fundamental level, VPLS is a type of Layer 2 VPN. All forms of Layer 2 VPNs require that you configure network protocols to handle the following:

  • intradomain routing — An interior gateway protocol (IGP) such as Open Shortest Path First (OSPF) or Intermediate System-to-Intermediate System (IS-IS)

  • interdomain routing — Border Gateway Protocol (BGP)

  • label switching — Multiprotocol Label Switching (MPLS)

  • path signaling — Resource Reservation Protocol (RSVP) or Label Distribution Protocol (LDP)

For more information about these protocols and examples of how to configure these protocols to support a Layer 2 VPN, see the Junos VPNs Configuration Guide.

Note

The 8-port, 12-port, and 48-port dense Fast Ethernet Physical Interface Cards (PICs) cannot push more than two labels onto an MPLS packet. Because of this, we do not recommend that you configure these PICs as core-facing or equivalent interfaces.