Yes, We Really Need Port-Security
This is a follow-up to my previous article “Do we really need Layer 2 Security?“. If you haven’t read that one, probably worth a quick run though to understand what types of attacks these techniques...
View ArticleYes, We Really Need Dynamic ARP Inspection
This is the second follow-up post to my my previous, “Do we really need Layer 2 Security?” article. If you haven’t read that one yet, take a moment to have a look see. Go ahead… I’ll wait for you...
View ArticleTracing a Layer 2 Path on Cisco Nexus Switches
Ever been stuck trying to figure out the exact switching path that packets take through your network? Me too. Here’s how I solved the problem without fancy Layer 2 traceroute tools. I’ve recently been...
View ArticleNetwork Rookies Leave Spanning Tree At Defaults
Network rookies leave spanning tree at defaults. The root bridge ends up as some switch in a closet. A new switch is added to the network, and sometimes traffic goes wonky for a while. Spanning tree...
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