Author Archives: crissa

frame relay switch – create a config

Posted on 17. February 2012 by crissa

Hello, for my new frame relay switch I was looking for a full mesh configuration. With this I could create different logical connections between the routers using frame relay just by changing the configuration. My new frame relay switch is … Continue reading →

Posted in Cisco, General | Tagged , , , , | Leave a comment

iPhone – the fischertechnik stand

Posted on 12. February 2012 by crissa

Hello, some iPhone stands are really expensive and I was looking for one that will also work with my current and maybe also with my next iPhone. Not to forget that I use an iPhone protection case and that I … Continue reading →

Posted in General, iPhone | Tagged , | Leave a comment

sispmctl – control a terminal server

Posted on 11. February 2012 by crissa

Hello, a terminal server is very useful in a Cisco lab. To be usefull it should be up and running, but keep it switched on 24/7 is not an option in a home lab. With a Gembird SIS-PM programmable power … Continue reading →

Posted in Cisco, General, Linux | Tagged , , , , , | Leave a comment

Using ipcheck to update your dyndns entry

Posted on 3. February 2012 by crissa

Hello, last night my Fritz!Box router failed to update my dyndns entry and so I couldn’t reach my private network during the day. One suggestion from helpful people was to mail the outside IP address to myself. Too easy! A … Continue reading →

Posted in General, Linux | Tagged , , , | Leave a comment

Hide a Token Ring router

Posted on 1. February 2012 by crissa

Hello, my current frame relay switch is a Token Ring router (see My current lab ). Once a frame relay switch is configured there is no need to reach it any more. But what about messages on the main syslog … Continue reading →

Posted in Cisco, General | Tagged , , , | Leave a comment

My current lab

Posted on 18. January 2012 by crissa

Hello, my current Cisco lab. On the left two 1712 routers and on the right from the top: A 2520 router, a 2511 terminal server, two 2950 switches and a 3548 switch. The 2520 is the latest addition to the … Continue reading →

Posted in Cisco, General | Tagged | Leave a comment

Using the AUX port to connect two routers

Posted on 15. January 2012 by crissa

Hello, the AUX port on a Cisco router is seldom used, but it can be useful as an extra connection between two routers in a lab environment. For this example I used two Cisco 2516 router. The first step is … Continue reading →

Posted in Cisco, General | Tagged , , , | Leave a comment

%cdp-4-duplex_mismatch

Posted on 13. January 2012 by crissa

Hello, when you use older Cisco routers together with more update routers in the same ethernet network and you are using CDP (Cisco Discovery Protocol) you maybe familiar with the following message. 000042: Jan 13 21:22:23.001: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered … Continue reading →

Posted in Cisco, General | Tagged , , | Leave a comment

Snow Leopard – Let’s Scan Again

Posted on 21. January 2011 by crissa

Hello, I don’t know why Apple use such names like Panther, Tiger or Leopard for their Mac OS X software. Don’t get me wrong, I like this names. But why on earth do they call one version Leopard and the … Continue reading →

Posted in General, Mac OS X | Tagged , , , | Leave a comment

sispmctl – light (on|off|toggle|state)

Posted on 12. January 2011 by crissa

Hello, this is a followup to the posts sispmctl and sispmctl – using it as non root . With this script we can switch the light on and off, toggle it and check the current state. This shell script shows … Continue reading →

Posted in General, Linux | Tagged , , , , , | Leave a comment