Pi4 runs fine for several weeks, then eth0 just disappears?
Posted: Sun Jul 26, 2020 4:26 pm
Pi4 runs fine for several weeks, then eth0 just disappears? The wlan0 interface seemed to be unaffected. It was simple to recover, just ifconfig eth0 down/up. Has anyone else seem this behavior? Only one of the 3 Pi4 devices I have has done this so far.
Re: Pi4 runs fine for several weeks, then eth0 just disappears?
Posted: Sun Jul 26, 2020 4:59 pm
I suppose you mean it loses its IP configuration.
Next time that happens run "ip link show" "ip address show" and "ip route show"
I suspect the interface will be there, link up, but no address and route.
If using DHCP the cause might be in the router config. Check DHCP lease duration see if that matches. Check the logs.
If static config check the Pi's config or swap the SD with a "good" one.
If you're using raspios and configured networking in any other way than via /etc/dhcpcd.conf, all bets are off.