Pierky 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)

Tags: 3640, GNS3 Lab and Exercise, GNS3 Topology, Policy Based Routing-PBR