Path measurement: Difference between revisions

Path measurement (view source)

881 bytes added , 27 May 2021

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 * Device to use: To use a remote device for path measurement, you first need to add that device as a remote device the list of [[Multi-device settings]]. It does not matter if the device is active or not.  You can select the device from the list of known multi-devices.
 * Device description: Similar to the description of the main device, this field is for informational purpose only and has no other effect than helping identifying the remote device in the statistics. Usually the location of the remote device is entered.
+* Remote device VLG filter: The traffic used for comparison at the main device can be filtered to any virtual link group defined at the client device. There are two main purposes for this setting:
+*# reduce the amount of data required to be transferred to the main device. The path measurement only considers connections seen on both devices, but the client device of course cannot know if any connection it sees also is visible on the main device. If only traffic of a specific virtual linkg group (VLG) actually reaches the main device, using this filter can reduce the amount of data transferred and later dismissed.
+*# filter duplicate traffic: If, for some reason, traffic is seen multiple times, it can create wrong results as the number of occurrences differs from main to client devices. A VLG filter can fix this problem by only considering one part of the total traffic.