Repurposed SG450Rev1 - Uplink fails randomly

[Timotei79]

Hi,
Could someone suggest how to track down why my uplink to my modem goes down randomly?
Disconnectin and reconnecting the cable works, but I am trying to find out if I have a hardware problem or a software network driver issue causing hanging.

FYI the Sophos Flexiport card NICs are 'I350 Gigabit Network Connection'

Very frustrating!

Thanks in advance.

[yourfriendarmando]

Try a different interface, or something por if the ordinary like shutting off Flow Control. It varies with each driver.

sysctl -a | grep -E 'fc|flow'

Even better, try the same config, on a different system with a similar number of available ports

[cookiemonster]

No clues in dmesg ?

[Timotei79]

Waiting to catch it again, been away for the weekend. Will do some digging.
It did happen again on Friday, and its resolved by unplugging the port and replugging.
Not sure which end is causing it, as using a cable modem that has restricted access to it.