Configuring OSPF Between the PE and CE Routers

You can configure OSPF (version 2 or version 3) to distribute VPN-related routes between PE and CE routers.

The following sections describe how to configure OSPF as a routing protocol between the PE and the CE routers:

• Configuring OSPF Version 2 Between the PE and CE Routers
• Configuring OSPF Version 3 Between the PE and CE Routers
• Configuring OSPF Sham Links for Layer 3 VPNs
• Configuring an OSPF Domain ID

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