Tag Archives: testing

Link Runner AT 2000 Review

When trying to resolve network issues away from your desk there are many approaches that can be taken. Having the right tools for the job makes all the difference of course. Previously I have always just carried a laptop for this. As part of a larger project we were able to roll in a Flunk Link Runner AT 2000. I have been very pleased with it so far when troubleshooting the basic connectivity issues. The Link Runner AT 2000 is a simple and easy to use network troubleshooting tool. It features cable diagnostics, switch discovery features, and IP connectivity tests … Continue reading

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Power over Ethernet Issues

With the invention of Power over Ethernet (PoE) bringing up light devices such as VOIP phones and wireless access points has become very easy. Power and data flow over the same cable on various wire pairs. The simplicity is great but the electrical requirements are a bit more particular with PoE. With full Gigabit implementations all wire pairs are required for power and for data transmission. When one pair is not properly terminated strange things happen… Continue reading

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Create ACL Rules with Wireshark

I stumbled onto this wireshark feature by accident really but thought I would share a little bit about it. Essentially what wireshark does is allows you to review all the captured packets and then a single packet in more detail. Continue reading

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Cisco Switch Remote SPAN

Capturing network traffic can be a very effective way of solving complicate issues particularly when log files are not yielding useful results. One issue typically is the ability to actually physically perform the capture. To overcome these limitations a Remote SPAN or RSPAN instance can be used. Continue reading

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