Aaron's Worthless Words

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Aaron does lots of stuff and, therefore, does nothing well. He's trying, though. https://masto.ai/@aconaway

Using CDP To Track Down Physical Connections

We have a location that’s a few blocks down from the main office here, and we were reviewing the circuit size to make sure it was sized properly. Since not one person knows what’s going on and the trending graphs gave us conflicting details, one of our network

Using MAC Access-lists

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 contains a whole mess of servers — email, web, ftp, etc. These should

Configuring Fault Tolerance on the CSM

Like (nearly) everything in the Cisco world, you can set up your CSM to fail over to another module when the primary dies a horrible death. You can have two in the same chassis or even have them in separate chassis — the process is the same no matter how you

Setting Up Syslog on a Linux Box for Your IOS Devices

A few articles ago, we discussed getting logging up and running on your IOS box. Part of the discussion was actually having the device log remotely to a box somewhere, but that’s kind of worthless without a properly (for definitions of proper) configured syslog server. A low-end Linux box

Running Multiple Data Centers on a Stick with the CSM

That’s an awesome title, eh? I’ve mentioned a router-on-a-stick before but not a data-center-on-a-stick (DCOAS). This is one of those Cisco terms I ran across a while ago and is a group of servers sort of sticking out on their own behind a load balancer and/or firewall.

Setting Up System Logging on an IOS Device

I like logging on an IOS device. I like to look at the buffer and tell you that your interface went down 30 seconds ago. I like to look on the box and see that BGP with my Internet provider has been flapping since 02:13ET. I like to look

Back to Basics -- CAM Table Population

At the office, we reprovision servers like it’s going out of style. It happens so often that my cabling documentation rarely matches what’s actually out in field, which is a pretty big problem when you’re trying to find to what switch port a server is connected. I