Assuming unmanaged switches, that don't give you any port statistics:
For those devices that have the facility, eg Linux boxes, NAS devices, NVRs and cameras where you have SSH or telnet access, checking the error rates for layer 2 can be comforting:
BTW - the rx/tx bytes wrap around after a few GB.
dvrdvs login: root
Password:
BusyBox v1.16.1 (2014-05-19 09:41:10 CST) built-in shell (ash)
Enter 'help' for a list of built-in commands.
can not change to guest!
[root@dvrdvs /] # ifconfig
eth0 Link encap:Ethernet HWaddr 8C:E7:48:6F:81:28
inet addr:192.168.254.1 Bcast:192.168.254.255 Mask:255.255.255.0
inet6 addr: fe80::8ee7:48ff:fe6f:8128/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:341676651 errors:0 dropped:1170 overruns:0 frame:0
TX packets:4289911818 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:578194202 (551.4 MiB) TX bytes:643868266 (614.0 MiB)
Interrupt:59
eth1 Link encap:Ethernet HWaddr 8C:E7:48:6F:81:27
inet addr:192.168.1.210 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::8ee7:48ff:fe6f:8127/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1666813208 errors:0 dropped:29457 overruns:0 frame:0
TX packets:3503563778 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:987212079 (941.4 MiB) TX bytes:1532542993 (1.4 GiB)
Interrupt:59 Base address:0x4000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:2078928 errors:0 dropped:0 overruns:0 frame:0
TX packets:2078928 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:161034725 (153.5 MiB) TX bytes:161034725 (153.5 MiB)
[root@dvrdvs /] #
