Note: I also use this introduction while talking to customers about Cisco Software-Defined Access, so stay with me.Īnd there we stayed for a good 15 or 20 years, with switching platforms growing more powerful with each generation, but their main functions being pretty much fixed. The ability to actually make routing decisions directly on our switches between multiple VLANs without traffic having to go to a dedicated router first (remember " router on a stick?") Powerful platforms such as the Cisco Catalyst 6500 series became commonplace in all layers of the network and network engineers were given a lot more options to customize and optimize their network topologies. Then the mid-2000s brought us "layer 3" switches with more functionality. Less flooding and broadcast traffic cluttering up your network, segmentation at layer 2 using VLANs, multiple links between devices without having to worry about loops. It wasn't that long ago (ok I guess it was) that network switches were considered just a step up from network hubs. This post was inspired by this demonstration project. We can now take advantage of the power and placement of these devices without having to connect external probes or sensors. 7 min read Imagine being able to run third-party applications directly on your Cisco network devices for troubleshooting, monitoring, or even services.
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