What prevents the switch from responding with tracert?

Question

Ping

Hello!

There is a funny situation with one of the switches. More precisely, not with one of them, but with the central one.
The DELL PowerConnect 7024 switch is also a network router.

If you ping him, then everything is fine:


And if I do a trace, then he does not respond:


Sometimes, when tracing, answers from him appear, but extremely rarely.

I have already broken my brain, I can’t understand what it could be connected with, especially since initially he always answered when he traced. From what moment and when it could begin - is not known.
There is nothing unusual in the logs, the usual authorization marks.

Answer 1

it looks like it's icmp type ( ping-test.ru/icmp )

Answer 2

Since ICMPs are handled exclusively by the CPU, devices sometimes drop extra ICMPs to avoid unnecessary overhead. On a number of devices, the minimum allowed number of such packets is hardwired into the code and is not configured in any way.