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6 reasons to take a new approach to packet capture



Traditionally network administrators have learnt to use packet analysis for troubleshooting complex problems. Some invested in expensive traffic capture appliance to capture and retain the traffic for later analysis; in case they get reports for a performance degradation, they can extract trace files and load them into a network analyzer (Wireshark or commercial) and look at packets. 

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Topics: NPM, network performance, Network troubleshooting

How to measure network performance through passive traffic analysis


Whichever tool you use it is important to  understand the fundamentals of how network performance metrics (like latency, packet loss or throughput) can be calculated.This calculation can be manual with Wireshark or any other packet analyzer or automated with the NPM solution of your choice.
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Topics: performance troubleshooting, NPM, network performance, Network troubleshooting

Performance degradation, the top 10 causes for network slowness


Diagnosing network performance issues is part of your daily work. Whatever the network diagnostic tools you use, it is important to understand what are the symptoms of network performance degradations and what are the most likely root causes for them. 

Accelerating troubleshooting operations is key to maintain the business productivity through excellent end-to-end user performance rates. 

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Topics: performance troubleshooting, NPM, network performance, Network troubleshooting

What drives network latency?


Understanding network latency is key to: 

  • Managing properly the delivery of applications through the network
  • Understanding how network performance can be improved

Read more to understand the basics of network performance. 

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Topics: NPM, network performance

Combine Netflow and packet analysis to boost network & performance visibility


Here is a typical context: many sites are spread around the world for manufacturing and two central datacenters host all the internal applications. The internet gateway is provided by the service provider. The traffic from the remote sites can either go to the internet gateway, to another remote site or to the datacenters.

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Topics: NPM, network performance

Troubleshooting: take your visibility beyond netflow!


In 2013, Cisco quoted that "Gartner stated that flow analysis should be done 80% of the time and that packet capture with probes should be done 20% of the time" ( reference ).  We think they were wrong!
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Topics: NPM, network performance, Network troubleshooting

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