There is a funny situation going on with one of the switches. To be more precise, not one of them, but the central one.
The DELL PowerConnect 7024 switch is also a network router.
If it is pinged, everything is fine:
And if I do a trace, it doesn't respond:
Sometimes when tracing answers from it appear, but very rarely.
I have already broken my brain, I can not understand what this could be connected, especially since initially he always answered when trasert. At what point and when it could start - do not know.
Nothing unusual in the logs, the usual authorization marks.