Policy-Based Routing (PBR)

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In this video, Keith Barker covers how to create a lab environment using GNS3 to test and see the results of Policy-Based Routing. He’ll walk you through processes such as creating ACLs, route maps, and setting IP policy.
Keith will show you how to set up a lab environment so you can experiment with different aspects of Policy-Based Routing, which is essentially just conditional overrides of the routing table. He’ll show you how to set up your topology in GNS3, then give you hands-on instruction for such processes as establishing access control lists, creating route maps, and setting basic IP policies. The video also features sections on configuration commands and topology diagrams, then demonstrates how you can verify the results of policy-based routing by running various simulations.
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[@gerolejolegion8725]

PBR configuration starts at 6:46

[@PowerUsr1]

Great job Keith. Keep up the excellent videos.

[@singletakecovers9740]

yep. nice video. Great stuff. Straight and to the point.

[@twanaosman1]

thanks Keith, it was so clear and useful

[@samuelkimani7672]

Thanks a lot Keith. Always helpful.

[@miltonaldridge4170]

Needed this at work. thanks alot.

[@Daniel77379]

Good stuff and clear message/information . Keep up the good work

[@abiyottesfay3698]

nice explanation and lesson.thanks

[@ShowMeTheLyrics]

Thank you Keith

[@williamturi5393]

Keith is a True Champ

[@cisco-ponlork2689]

Nice to see that!.

[@Abdulla449]

Thank you Keith for the great video

[@anwarahmed5342]

Great job👍

[@rockinron5113]

Superb. Cheers Keith.

[@sait5489]

Thanks Keith :-)

[@bunleangmeng4995]

Nice explain thanks Dear

[@ZUMBIDAF800R]

you could make a video of how to configure vyatta or vyos closing a BGP session

[@MarwinSatriaAnanta]

Nice !!! Can i use this in bgp ?

[@SudhaGanapareddy]

Route map is implicit deny then how the ICMP suceed without permit rule ?

[@sebas.av25]

thanks, helped a lot :)

[@cbtnuggets]

Glad it helped, Sebastian!

[@DillyDogSays]

Are the serial interfaces actually serial? Like SSH?

[@roy5721]

Can this concept applied to other routing protocols like bgp?

[@haifa6004]

how to tell percentage of traffic forward in different route

[@sv0079807]

Outstanding explanation ..but what will happen if S2/1 of R2 goes down ? will drop all the UDP packets or it will use another link for UDP ?

[@anwarahmed5342]

Good question,
Will not drop UDP packets, instead it will use the normal path, which is for both UDP and TCP traffic in the regular path.

[@DikiciBurak]

Hello,
You have applied PBR to the fa0/0 interface on R1 for inbound traffic. What about the returning or response traffic from R3 ? I think the returning traffic use the link between the R3 and R1. It doesn't use the link between R2 and R1. And it couses asymmetric routing in this case. What do you think about this situation Keith ?

[@keithbarker4353]

Yes. If EIGRP is running, R3 would use the 512K link to forward traffic to the PC. So would R2. :) It this topology that indeed would result in asymmetrical routing as the reply path would be different from the initial path.

[@shujathmohiuddin264]

what do we need to do to change the return traffic?

[@tejendra53]

keith here i stuck, what if router 3 has pc hanging on router 3 and you want to route traffic to reach PC 1 on router 1
will the traffic goes R3>R2>R1>pc1 ?
i have tried but the traffic goes like this R3>R2>R3>R1>PC1
how can i change this behavior

[@Hot-1LE]

Traffic from router 3 PC should go R3 > R1 > PC1 since it has the faster link. If you wanted it to use the other path R2 > R1 then you would need another policy route to specify so