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Path measurement: Difference between revisions
→Settings
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* '''Ignore IP identification field''': This option can be enabled if the IP identification field in the IPv4 header is modified by some component in the network. Often it remains constant for a single packet so this option should be left disabled as it will also increase the chance of reporting duplicate packets. But if you notice symmetrical packet loss you can enable this option to see if this helps. | * '''Ignore IP identification field''': This option can be enabled if the IP identification field in the IPv4 header is modified by some component in the network. Often it remains constant for a single packet so this option should be left disabled as it will also increase the chance of reporting duplicate packets. But if you notice symmetrical packet loss you can enable this option to see if this helps. | ||
* '''Ignore VLAN tags for connection matching''': The path measurement only calculate loss and latency for connections seen on both devices. Usually the connection ID takes the IP pairs, port ports and possible VLAN tags into account. If a VLAN is different on both machines for the some connection, then this option must be enabled to be able to correlate the connection and calculate correct statistics. | * '''Ignore VLAN tags for connection matching''': The path measurement only calculate loss and latency for connections seen on both devices. Usually the connection ID takes the IP pairs, port ports and possible VLAN tags into account. If a VLAN is different on both machines for the some connection, then this option must be enabled to be able to correlate the connection and calculate correct statistics. | ||
* '''Main device VLG filter:''' Similar to the remote device VLG filter, it is also possible to limit the amount of data analysed by any configured virutal link group. Often, the main device is located at a central network point and thus sees a lot of traffic that is not actually going to the remote device. The algorithm will automatically take this into account, but using a filter will reduce the processing overhead as well as the amount of data that needs to be buffered. | |||
The settings must be saved but to actually take effect, a restart of the packet processing is necessary. If this step is required will tell so at the bottom of the page under '''Required actions'''. | The settings must be saved but to actually take effect, a restart of the packet processing is necessary. If this step is required will tell so at the bottom of the page under '''Required actions'''. | ||