Burst analysis on a Mirror or Packet Broker input: Difference between revisions

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== MAC Burst measurement ==
== MAC Burst measurement ==


To analyze a specific link, you can use the MAC burst analysis. This is shown in the second tab '''MACs''' in the burst analysis module. It allows to set a specific receive and send packet rate for one mac address. If you have an uplink, simply use the router´s MAC address here and then specify the maximum receive and send rate of the routers uplink.
To analyze a specific link, you can use the MAC burst analysis. This is shown in the second tab '''MACs''' in the burst analysis module. It allows to set a specific receive and send packet rate for one mac address. If you have an uplink, simply use the router´s MAC address here and then specify the maximum receive and send rate of the router´s uplink.


In this example, I have used a test link with 250MBit/s downlink and 40MBit/s uplink for the Router Mac address.
In this example, I have used a test link with 250MBit/s downlink and 40MBit/s uplink for the router MAC address.


[[File:Burst mac measurement.png|500px]]
[[File:Burst mac measurement.png|500px]]


Please note that the Burst analysis is done with 1 millisecond resolution by default. In our example, the router is connected with 1 GBit/s and it can send more than the configured bandwidth. This is shown in the display as an utilization of ">> 100%" and indicates a burst that might not be able to be handeled by this uplink.
Please note that the burst analysis is done with 1 millisecond resolution by default. In our example, the router is connected with 1 GBit/s and it can send more than the configured bandwidth. This is shown in the display as an utilization of ">> 100%" and indicates a burst that might not be able to be handled by this uplink.


== Advantage for Mirror Port and Packet Brokers ==
== Advantage for Mirror Port and Packet Brokers ==


The MAC burst detection can be used for a specific end device ( a file server,... ) or for the gateway of an uplink ( router,... ). It allows to monitor links and end devices even in out-of-band installations.
The MAC burst detection can be used for a specific end device ( a file server,... ) or for the gateway of an uplink ( router,... ). It allows to monitor links and end devices even in out-of-band installations.
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