Selective routing is a powerful tool when it comes to managing network traffic. In this video, examine the logic between traditional and policy-based routing.
- In this video we want to take a look … at something called PBR, or Policy-Based Routing. … To understand how Policy-Based Routing works, … let's contrast it with traditional routing. … With traditional routing, a frame comes into the router … and the router is going to to look at the layer two header. … And it's going to check out that frame check sequence … to make sure the frame has not been corrupted in transit. … Assuming all looks good, it's going to remove … that Layer 2 header. … And that exposes the layer 3 header … which has a destination IP address. … And the router is going to take a look at … that destination IP address and make a forwarding decision … based on that router's IP routing table … and it's going to send the frame on its way. … However, there may be times when we want … to do something different … than the IP routing table would have us do. … Perhaps for performance reasons, … for security reasons, for some sort of design reason, … we might want to select traffic to take a different path …
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