Request timeout线条与“互联网中断”行为相关（没有网页加载等）。
- 有线或 WiFi 没有区别
- 路由器：Netgear R7000
- 调制解调器：SMC Networks D3CM1604
- ISP：康卡斯特
仅对调制解调器进行电源循环可以恢复正常功能约一天，然后它就会重新出现。
这似乎是调制解调器的问题。我该如何找到根本原因？
PING 8.8.8.8 (8.8.8.8): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
Request timeout for icmp_seq 3
Request timeout for icmp_seq 4
Request timeout for icmp_seq 5
Request timeout for icmp_seq 6
Request timeout for icmp_seq 7
Request timeout for icmp_seq 8
64 bytes from 8.8.8.8: icmp_seq=9 ttl=119 time=25.961 ms
64 bytes from 8.8.8.8: icmp_seq=10 ttl=119 time=27.544 ms
64 bytes from 8.8.8.8: icmp_seq=11 ttl=119 time=26.326 ms
64 bytes from 8.8.8.8: icmp_seq=12 ttl=119 time=26.653 ms
64 bytes from 8.8.8.8: icmp_seq=13 ttl=119 time=25.520 ms
64 bytes from 8.8.8.8: icmp_seq=14 ttl=119 time=26.044 ms
64 bytes from 8.8.8.8: icmp_seq=15 ttl=119 time=26.408 ms
64 bytes from 8.8.8.8: icmp_seq=16 ttl=119 time=27.913 ms
64 bytes from 8.8.8.8: icmp_seq=17 ttl=119 time=26.010 ms
64 bytes from 8.8.8.8: icmp_seq=18 ttl=119 time=26.094 ms
64 bytes from 8.8.8.8: icmp_seq=19 ttl=119 time=28.660 ms
64 bytes from 8.8.8.8: icmp_seq=20 ttl=119 time=49.911 ms
64 bytes from 8.8.8.8: icmp_seq=21 ttl=119 time=25.720 ms
64 bytes from 8.8.8.8: icmp_seq=22 ttl=119 time=26.906 ms
64 bytes from 8.8.8.8: icmp_seq=23 ttl=119 time=26.084 ms
Request timeout for icmp_seq 24
Request timeout for icmp_seq 25
Request timeout for icmp_seq 26
Request timeout for icmp_seq 27
Request timeout for icmp_seq 28
Request timeout for icmp_seq 29
Request timeout for icmp_seq 30
Request timeout for icmp_seq 31
Request timeout for icmp_seq 32
Request timeout for icmp_seq 33
Request timeout for icmp_seq 34
Request timeout for icmp_seq 35
Request timeout for icmp_seq 36
Request timeout for icmp_seq 37
Request timeout for icmp_seq 38
Request timeout for icmp_seq 39
Request timeout for icmp_seq 40
Request timeout for icmp_seq 41
Request timeout for icmp_seq 42
Request timeout for icmp_seq 43
Request timeout for icmp_seq 44
Request timeout for icmp_seq 45
Request timeout for icmp_seq 46
64 bytes from 8.8.8.8: icmp_seq=47 ttl=119 time=26.525 ms
64 bytes from 8.8.8.8: icmp_seq=48 ttl=119 time=25.628 ms
64 bytes from 8.8.8.8: icmp_seq=49 ttl=119 time=25.408 ms
64 bytes from 8.8.8.8: icmp_seq=50 ttl=119 time=25.792 ms
64 bytes from 8.8.8.8: icmp_seq=51 ttl=119 time=26.792 ms
64 bytes from 8.8.8.8: icmp_seq=52 ttl=119 time=26.603 ms
64 bytes from 8.8.8.8: icmp_seq=53 ttl=119 time=26.349 ms
64 bytes from 8.8.8.8: icmp_seq=54 ttl=119 time=27.684 ms
64 bytes from 8.8.8.8: icmp_seq=55 ttl=119 time=33.048 ms
64 bytes from 8.8.8.8: icmp_seq=56 ttl=119 time=27.179 ms
64 bytes from 8.8.8.8: icmp_seq=57 ttl=119 time=25.499 ms
64 bytes from 8.8.8.8: icmp_seq=58 ttl=119 time=27.939 ms
64 bytes from 8.8.8.8: icmp_seq=59 ttl=119 time=27.100 ms
64 bytes from 8.8.8.8: icmp_seq=60 ttl=119 time=27.095 ms
64 bytes from 8.8.8.8: icmp_seq=61 ttl=119 time=25.687 ms
64 bytes from 8.8.8.8: icmp_seq=62 ttl=119 time=29.353 ms
Request timeout for icmp_seq 63
Request timeout for icmp_seq 64
Request timeout for icmp_seq 65
Request timeout for icmp_seq 66
Request timeout for icmp_seq 67
Request timeout for icmp_seq 68
Request timeout for icmp_seq 69
Request timeout for icmp_seq 70
Request timeout for icmp_seq 71
Request timeout for icmp_seq 72
Request timeout for icmp_seq 73
Request timeout for icmp_seq 74
Request timeout for icmp_seq 75
Request timeout for icmp_seq 76
Request timeout for icmp_seq 77
Request timeout for icmp_seq 78
Request timeout for icmp_seq 79
Request timeout for icmp_seq 80
Request timeout for icmp_seq 81
Request timeout for icmp_seq 82
64 bytes from 8.8.8.8: icmp_seq=83 ttl=119 time=27.984 ms
64 bytes from 8.8.8.8: icmp_seq=84 ttl=119 time=24.854 ms
64 bytes from 8.8.8.8: icmp_seq=85 ttl=119 time=25.541 ms
64 bytes from 8.8.8.8: icmp_seq=86 ttl=119 time=26.787 ms
64 bytes from 8.8.8.8: icmp_seq=87 ttl=119 time=27.680 ms
64 bytes from 8.8.8.8: icmp_seq=88 ttl=119 time=26.352 ms