Latest Posts
Using Probes on the CSM
There are three different ways that a CSM checks for the health of the servers – active probes, inband health checking, and inband HTTP monitoring. Let’s talk about active probes. Active …
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 …
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 …
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 …
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 …
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 …
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 …
How Screen Can Change Your Life
Alright, that’s an exaggeration, but screen is pretty freaking cool. It’s an app that’s (usually) run under Linux that lets you run commands then detach from that session and …