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Issue tracking for the archive.raspberrypi.org repo
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Ethernet (eth0) didn't coming back to running after manually putting down from ifconfig/ioctl #208

Closed jarusRnD closed 2 years ago

jarusRnD commented 3 years ago

So basically I want to turn on/off wire & wireless network interface from program or terminal. For disabling/enabling wlan0 network interface I try below cmd that working completely fine.

sudo ifconfig wlan0 down
sudo ifconfig wlan0 up

But for eth0 same method not working below "/var/log/syslog" given for sudo ifconfig eth0 down

Nov  5 13:18:28 raspberrypi dhcpcd[389]: eth0: carrier lost
Nov  5 13:18:28 raspberrypi dhcpcd[389]: eth0: deleting address fe80::9e89:dc86:fac9:a345
Nov  5 13:18:28 raspberrypi dhcpcd[389]: eth0: deleting route to 192.168.1.0/24
Nov  5 13:18:28 raspberrypi dhcpcd[389]: eth0: deleting default route via 192.168.1.1
Nov  5 13:18:30 raspberrypi systemd[1]: systemd-hostnamed.service: Succeeded.

syslog for sudo ifconfig eth0 up Nov 5 13:21:29 raspberrypi kernel: [ 216.923295] 8021q: adding VLAN 0 to HW filter on device eth0 Probably dhcpcd can't acquire carrier for eth0.

Below "/etc/dhcpcd.conf" file contain give 

interface eth0
static ip_address=192.168.1.246/24
static routers=192.168.1.1
static domain_name_servers=8.8.8.8
metric 400

and i have not change in "/etc/network/interfaces" file.

XECDesign commented 3 years ago

If you've not set up /etc/network/interfaces accordingly and disable other network managers, then ifupdown isn't the right tool. Edit: Sorry, I thought you said you were using ifdown.

Does sudo ip link set eth0 down work?

XECDesign commented 3 years ago

Not having any issues with either ip link or ifconfig when trying to do the same. I'm also not seeing the message about VLAN 0.