Switching

Using MAC Access-lists

·3 min read

We ran into this today, and, though I knew it existed, I never actually saw it in the wild. I’m talking about MAC access-lists. In the example setup, we have a DMZ off of a firewall that …

Storm Control

·4 min read

We run a large number of LANs all over the country that are “controlled” by the particular business unit. We manage the gear, but, since they have the money and have to pay for anything we …

Getting Started with EtherChannel

·3 min read

In my professional life at some point, I came across someone who had a stack of Catalyst 2950 switches all trunked together with their Internet routers connected to the top of the stack. This was all …