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Monitoring QoS traffic class drops. Reference prior post. Discuss what happened with drops in high piroiry queue. Several of us at Netcraftsmen were involved in an interesting network QoS configuration case a few weeks ago. The customer had requested...
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Almost all network management products that collect performance data incorporate some type of rollup as the data ages. In most cases, the data over longer time intervals is averaged and the resulting average value is used in the performance graphs. I...
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I've been working with Steve Meyer at Netcraftsmen on Qos policies for a customer where they have voice, interactive video (i.e. Telepresence), video conferencing, streaming video, and business applications. They also have what we call "streaming...
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This week I was part of a panel at the Satellite 2010 conference in Washington, DC. Our panel was titled "Securing Your Network: Protecting your Operations, Content and Assets." Your first thought upon seeing the session title was probably "encryption...
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Buffer tuning has long been an interesting topic for me. I recently found a blog post by Brough Turner, who wrote an interesting article about a potential misconfiguration of AT&T wireless routers that cause ping round trip times to be either <...
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I'm working on a QoS job and we're not trusting the phones. I presume that most everyone has heard of the hacking that some fellows did to break into a hotel's network by using a small program that made their PC look like a Cisco phone. The...
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I'll periodically run into someone who is attempting to implement policy routing by modifying interface bandwidth statements. What they're trying to do is to have traffic prefer a certain path through their network by either increasing or decreasing...
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VoIP troubleshooting is a pretty interesting problem. (See my earlier blog entry regarding my talk at VoiceCon Fall 2007.) There are a large number of tools that look at packets on the wire, or look at the RTCP (Real Time Control Protocol) stream from...
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