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MPLS Fundamentals by Luc De Ghein - CCIE No. 1897

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PE-CE Routing Protocols

Routing needs to occur between the PE and CE routers. The PE-CE routing protocols that Cisco IOS supports are static routing, RIPv2, Open Shortest Path First (OSPF), Enhanced Interior Gateway Routing Protocol (EIGRP), Intermediate System-to-Intermediate System (IS-IS), and eBGP.

Connected Routes

Strictly speaking, the connected routes are not a routing protocol. However, to ensure connectivity, it is best practice to redistribute the connected routes on the PE router into BGP. That way, when the user launches a ping from a CE router to the remote CE router, the return packet is routed back. By default, if the user sends a ping and does not specify the source IP address, it takes as the source IP address the IP address ...

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