GNS3-Topology: Dual WAN connection on Cisco with Policy-based routing (PBR)
Written by pierky from http://pierky.tel/ on April 14th, 2009 | 9 CommentsPierky put together a great exercise lab giving you a scenario and objective. The solution is in a DOC file in the archive package.
Scenario
We have a router connected to the ISP with two WAN connections:
- a Bronze link, with little bandwidth, on which we have a /30 subnet;
- a Gold link, with good performances, on which we have a /30 point-to-point subnet and an additional /24 routed subnet.
Note that ISP does not accept inbound traffic coming from a subnet that is not the one routed through the ingress interface: for example, we can’t send traffic from 1.1.1.0/24 out the Bronze link. One subnet, one link.
Objectives
Our goals are:
- users on the LAN need access to Internet;
- mission critical traffic has to go out through the Gold link;
- our servers have to be reachable from the outside on their public IP addresses.
For the sake of simplicity, in our example and lab mission critical traffic will be telnet traffic. In real life it can be RTP, database or other important traffic.
Routers Used: 3640
IOS: c3640-jk9s-mz.124-16
Feature of Topology: Policy-Based Routing(PBR)
Image: 
Download: GNS3-Labs-Dual WAN connection on Cisco with PBR-Pierky
See Pierky’s lab at his site: Dual WAN connection on Cisco with Policy-based routing (PBR)
23,687 viewsTags: 3640, GNS3 Lab and Exercise, GNS3 Topology, Policy Based Routing-PBR
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- System and network engineer, Cisco CCNP certified Blog: http://pierky.wordpress.com/ - About me: http://pierky.tel/
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April 14th, 2009 at 6:33 am
[...] You can download GNS3-Lab from GNS3-Labs.com: http://www.gns3-labs.com/2009/04/14/gns3-topology-dual-wan-connection-on-cisco-with-policy-based-rou... [...]
November 1st, 2009 at 8:05 pm
Thanks! I’ve been fighting a dual ADSL two LAN problem for hours! This hit the spot straight away.
Cliff
December 3rd, 2009 at 11:55 am
Next time include sources please =)
February 5th, 2010 at 1:42 am
I really enjoyed exploring your site. good resource … thanks for sharing the info, keep up the good work going….
August 26th, 2010 at 9:25 am
it’s a great lab, i really enjoyed thanks a lot
October 24th, 2011 at 2:51 am
Very interesting and great read. I am trying to solve the same problem so to speak, but would like to achieve all of my project inside of my 2950 switch. I also have dual WAN connections (Cable and DSL), and have the ability to tunnel into my web boxes from outside for tweeks, my dev boxes for double checking stuff while I am out and hitting the email server. Would be nice to also crank down some of the p2p stuff my kids keep doing and move them down via QOS.
Anyone done anything like this? If so please email me @ danny at missing.com.
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