Filter-Based Forwarding (FBF) or (for some vendor is also called Policy Based Routing (PBR)) is a simple method to route IP traffic to different interfaces on the basis of Layer 3 parameters (e.g. source or destination IP) or Layer 4 parameters (source or destination ports). Example: Objective: – to configure R1 to forward traffic originating from HostX under 10.10.1.0/24 to use ISP-X to reach Server 20.20.20.1 – to configure R1 to forward traffic originating form HostY under 10.20.1.0/24 to use…
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