Switchport Fluke not always working

RouterOS General
1

Hi there,

attached I do have two test results of a fluke network tester - in one there are details about which switchport the device is connected, on the second one not. The difference between these two protocols is only a small time gap of two hours between these two tests.
Does anyone have an idea why on one port I get details about the switch and on the second one not?

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Test02.png
Test01.png

2

The switch data is derived from CDP packets, which are periodically broadcast by switch via all (active) ports. Why fluke received those during one session and not during the other session is beyond my knowledge.