Why does the network card on a Linux system boot on its own?

When I was using Telnet to remotely access my target computer on Windows and conducting latency testing with cyclictest, after several hours of execution, I suddenly found that the telnet connection was interrupted: C:\Users\guoya>telnet 192.168.5.1 ... 遗失对主机的连接。(Lost connection to host) At this time, I saw the following message appearing on my target computer, as if the network card eth2 had been restarted: [18825.382832] asix 1-6:1.0 eth2: Link is Up - 100Mbps/Full - flow control rx/tx However, at this time, no one or any other process was operating the target device. Of course, there is no process operating eth2 at this moment. My target computer is using a system that I compiled kernel 6.4.0 to generate bzImage and compiled busybox to generate the root file system, # taskset -c 2 cyclictest -p 80 -t 1 -n -i 1000 -l 100000000000 /dev/cpu_dma_latency set to 0us policy: fifo: loadavg: 1.36 1.22 1.14 1/127 1617 T: 0 ( 1553) P:80 I:1000 C:11258227 Min: 2 Act: 3 Avg: 3 Max: 21