NetworkGods – Routing, Switching, Wireless, Automation
Configuring an IPsec GRE (Generic Routing Encapsulation) VPN tunnel with OSPF (Open Shortest Path First) involves several steps. In this example, we’ll configure a basic IPsec GRE VPN tunnel between two routers and enable OSPF routing over the tunnel. For this example, we’ll assume Router A and Router B are the two endpoints of the VPN tunnel.
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Route redistribution in OSPF (Open Shortest Path First) allows routes learned from one routing protocol to be advertised and used in another routing protocol. Redistribution can be useful in scenarios where multiple routing protocols are used within an enterprise network. Here’s a basic guide on how to configure route redistribution in OSPF:
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Configuring OSPF (Open Shortest Path First) with BGP (Border Gateway Protocol) on top is a common practice in large-scale networks where OSPF is used for intra-domain routing and BGP is used for inter-domain routing. This approach is often referred to as “OSPF as the IGP (Interior Gateway Protocol) and BGP as the EGP (Exterior Gateway Protocol).” Here’s a basic guide on how you can configure OSPF and BGP coexistence:
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