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Policy Based Routing Sim

May 8th, 2014 in Lab Sim, LabSim Go to comments

Question

Company TUT has two links to the Internet. The company policy requires that web traffic must be forwarded only to Frame Relay link if available and other traffic can go through any links. No static or default routing is allowed.

BGP_Policy_Based_Routing_Sim.jpg

 

Answer and Explanation:

Notice: The answer and explanation below are from PeterPan and Helper.Please say thank to them!

All the HTTP traffic from the EIGRP Network should go through Frame Relay link if available and all the other traffic should go through either link.
The only router you are able to administrate is the Border Router, from the EIGRP Network you may only send HTTP traffic. As the other people mentioned, actually it is not a BGP lab. You are not able to execute the command “router bgp 65001”

1) Access list that catches the HTTP traffic:
BorderRouter(config)#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

(Update: We don’t need the last command route-map pbr permit 20 to permit other traffic according to Cisco:

“If the packets do not meet any of the defined match criteria (that is, if the packets fall off the end of a route map), then those packets are routed through the normal destination-based routing process. If it is desired not to revert to normal forwarding and to drop the packets that do not match the specified criteria, then interface Null 0 should be specified as the last interface in the list by using the set clause.”

Reference: http://www.cisco.com/en/US/products/ps6599/products_white_paper09186a00800a4409.shtml)

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 route-map we configured is working properly.

Note: We have posted a Policy Based Routing lab on GNS3 similar to this sim with detailed explanation, you can read it here.

Other lab-sims on this site:

EIGRP Stub Sim

OSPF Sim

EIGRP OSPF Redistribution Sim

IPv6 OSPF Virtual Link Sim

EIGRP Simlet

Comments
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  1. IDN
    March 16th, 2017

    Please sent Q149/Q41/Q15 still valid… ahkmad[dot]saprudin[at]gmail[dot]com

  2. DMP CISCO
    March 16th, 2017

    All I have ccnp routing 300-101 exam tomorrow, can any one please send new 15Q for me in {email not allowed}

  3. DMP CISCO
    March 16th, 2017

    Hi All I have ccnp routing 300-101 exam tomorrow, can any one please send new 15Q for me in meta4london[at][gmail][dot]com.
    Many Thanks

  4. JRouter
    March 17th, 2017

    Anyone with verifiable Dumps please email to jfuentessenior GMAIL COM……testing on March 17……..any help for the 149+15……most appreciated!!

  5. Nila
    March 18th, 2017

    Which dumps valid for 300-101?
    Please help me.

  6. jZ
    March 20th, 2017

    any updates Jrouter? did you pass the exam?

  7. san 2017
    March 23rd, 2017

    Hi Everyone,

    Please share this dumps 149q+41q+15q or any latest valid dumps if available.

    san242721 @ gmail com

  8. ishaq
    March 27th, 2017

    i had done this lab but what is the way to test the simulation that is it working properly or nottttt

  9. DAP
    March 28th, 2017

    Guys i have a question about this . Once you have configured this and you do a
    show route-map

    if its correct In the output you will see the line “Policy routing matches: 9 packets…”. It means that the route-map we configured is working properly.

    Do we then have to do anything else in this eg trace route or prove which link its going over etc ? If so what ?

  10. DAP
    March 28th, 2017

    Just to clarify on my last comment i meant in the exam ?

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