Policy nav is a major topic on your BSCI exam, And you’ll find considerable policy routing going on in today’s production networks. But what the heck is policy routing?
Policy based direction-finding, Generally known “Policy nav, Is the use of route maps to look for the path a packet will take to get to its final destination. As you progress through your CCNP studies and go to the CCIE (Or to a Cisco service quality certification), viewers traffic can be “as well as” By policy routing as a way to give different levels of service to various classes of traffic. (This is wholesale jerseys China
done by marking the traffic and placing the various classes of traffic in different queues in the router, Allowing the boss to give some traffic higher priority for transmission.)
whether you’re running policy routing at the interface level, On boxes created locally, as both, Always run the command show ip policy to verify you’ve got the right route maps on the proper interfaces.
R2show ip rule
user interface Route map
And here’s the big rule in order to.
If a packet doesn’t match any of your criteria in a route map, Or does match a line that has an explicit deny account statement, The data is sent to the routing process and will also be processed wholesale jerseys China
normally. If you won’t want to route packets that do not meet any route map criteria, The set command is employed to send those packets to the null0 interface. This set command medicine final set command in the route map.
There are four scenarios for an incoming packet when route maps are in use. this process example illustrates all of them.
R2(Config)Access list 29 licenses host 188.8.131.52
R2(Config)Access list 30 allow host 184.108.40.206
R2(Config)Access list 31 authorize host 220.127.116.11
R2(Config)Access list 32 grant host 18.104.22.168Assuming the route map has been placed on the router’s ethernet0 interface, A packet sourced from 22.214.171.124 would match the first line of the route map and have its next hop IP address set to 126.96.36.199.
A packet acquired from 188.8.131.52 would match the next permit record (collection number 20). as there is no action listed, This packet would return to the routing engine to undergo the normal routing procedure. All traffic that did not match those two addresses would also be routed normally there would be no action taken by the route map.