Tag Archives: trouble shoot

Cisco Switch Wireshark Packet Capture

One of the most fundamental troubleshooting concepts in all of IT is to capture packets and review the data as it flows over the wire. Historically the easiest way to do this was to configure some type of SPAN port on a switch to copy the traffic to your pack capture device. With today’s less expensive and more powerful hardware it should come as no surprise that this functionality is now available on network hardware it’s self. Continue reading

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Taking a Screenshot on an 8800 Series Cisco Phone

Taking screenshots of the screen of Cisco IP phones can be helpful in remote troubleshooting and documentation. Taking screenshots of the latest 88xx phones is just as simple as in the past. Continue reading

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Cisco IOS Task Automation

If you love your server or desktop operating system’s CLI as much as myself you have probably banged out a few scripts to automate tasks at least a time or two… Did you know you can also script and automate tasks on Cisco IOS networking devices? The options are wrapped around the built in embedded event manager. The embedded event manager, or EEM for short, can track a number of sources including the syslog, SNMP, timers, counters and more. These are called event detectors. When an event is detected a policy can be trigged and some action taken. These actions … Continue reading

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Collecting CLI Data from Cisco Devices Via HTTP

I always try to approach technical challenges with the thought that “just because something can’t be done doesn’t mean it can’t be done”.   Sure enough I had a problem like this cross my desk again the other day.   I wanted a simple way to get the number of active calls on a handful of MGCP PRI gateway routers.  Unfortunately I couldn’t find a single SNMP data point for this information.  I knew IOS routers had an HTTP interface so I started checking around to see how easy it would be to script against. Sure enough, it really wasn’t all that … Continue reading

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