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All subsequent packets will show the time since the last time reference. Set Time Reference (toggle) Toggles the time reference state of the currently selected packet to on or off.Find Next Find the next time referenced packet in the “Packet List” pane.Find Previous Find the previous time referenced packet in the “Packet List” pane.įigure 6.11. Wireshark showing a time referenced packetĪ time referenced packet will be marked with the string REF in the Time column (see packet number 10). To work with time references, choose one of the Time Reference items in the Editmenu or from the pop-up menu of the “Packet List” pane. If one of the other time display formats are used, time referencing will have no effect (and will make no sense either). Time referencing will only be useful if the time display format is set to “Seconds Since Beginning of Capture”. The time references will not be saved permanently and will be lost when you close the capture file. It’s possible to set multiple time references in the capture file. It will be useful, if you want to see the time values relative to a special packet, e.g. A time reference is the starting point for all subsequent packet time calculations. The user can set time references to packets. If you use Seconds it would show simply 1 and if you use Nanoseconds it shows 1.123456000. This will be displayed using the “Automatic” setting for libpcap files (which is microseconds).

Precision example: If you have a timestamp and it’s displayed using, “Seconds Since Previous Packet”, : the value might be 1.123456.

Showing the preferences info below just to show it can go to nanosecond and that you can adjust the timing preference itself. But, there are timing preferences in the software to show you that Wireshark does indeed go to the nanosecond. The precision of the timing can actually depend on settings in Wireshark, the network card, the network card driver and it can even seem like diffrent OS's can make a difference but I think that's because of the drivers. The software only shows what the nic 'sees'.

What is wireshark time in