CORRECT TEXT
(Policy Based Routing Sim)
Company Acne has two links which can take it to the Internet. The company policy demands that
you use web traffic to be forwarded only to Frame Relay link and other traffic can go through any
links that are available. Use BGP attributes to solve the requested action.
Answer: See the explanation
Explanation:
1) Create an Access list that catches the HTTP traffic:
BorderRouter#access-list 101 permit tcp any any eq www
Note that the server was not directly connected to the Border Router. There were a lot of EIGRP
routes on it. In the real exam you do not know the exact IP address of the server in the EIGRP
network so we have to use the source as “any” to catch all the source addresses.
2) Route map that sets the next hop address to be ISP1 and permits the rest of the traffic:
BorderRouter(config)#route-map pbr permit 10
BorderRouter(config-route-map)#match ip address 101
BorderRouter(config-route-map)#set ip next-hop 10.1.101.1
BorderRouter(config-route-map)#exit
BorderRouter(config)#route-map pbr permit 20
(NoticE. the route-map pbr permit 20 line allows other traffic than HTTP to be routed. Otherwise,
other traffic will be dropped)
3) Apply the route-map on the interface to the server in the EIGRP Network:
BorderRouter(config-route-map)#exit
BorderRouter(config)#int fa0/0
BorderRouter(config-if)#ip policy route-map pbr
BorderRouter(config-if)#exit
BorderRouter(config)#exit
4) There is a “Host for Testing”, click on this host to open a box in which there is a button named
“Generate HTTP traffic”. Click on this button to generate some packets for HTTP traffic. Jump
back to the BorderRouter and type the command “show route-map”.
BorderRouter#show route-map
In the output you will see the line “Policy routing matches: 9 packets…”. It means that the routemap we configured is working properly.First the access list was implemented so that the traffic can be conditioned. Then the router map is
configured to set the next hop address to ISP1 and the rest of the traffic is permitted to pass.
Since there is EIGRP network, route map is applied on the interface to the server in the EIGRP
network.