Cisco CCNP / BSCI Exam Tutorial: Introduction To Policy Routing
Policy routing is a major topic on your BSCI exam, and you’ll find quite a bit of policy routing going on in today’s production networks. But what exactly is policy routing?
Policy-based routing, generally referred to as “policy routing”, is the use of route maps to determine the path a packet will take to get to its final destination. As you progress through your CCNP studies and go on to the CCIE (or to a Cisco Quality Of Service certification), you’ll find that traffic can be “marked” by policy routing in order to give different levels of service to various classes of traffic. (This is done by marking the traffic and placing the different classes of traffic in different queues in the router, allowing the administrator to give some traffic higher priority for transmission.)
There are some basic policy routing rules you should know:
Policy routing doesn’t affect the destination of the packet, but does affect the path that is taken to get there.
Policy routing can forward traffic based on the source IP address or the destination...
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