Turning On Network Debugging
You can set systemd-networkd
to work in debug mode so that you can analyze log files with debugging information to help troubleshoot networking problems.
You can turn on network debugging by adding a drop-in file in /etc/systemd
to customize the default systemd configuration in /usr/lib/systemd
.
Procedure
Run the following command as root to create a directory with the name
systemd-networkd.service.d
, including the.d
extension:mkdir -p /etc/systemd/system/systemd-networkd.service.d/
Run the following command as root to establish a
systemd
drop-in unit with a debugging configuration for the network service:cat > /etc/systemd/system/systemd-networkd.service.d/override.conf [Service] Environment=SYSTEMD_LOG_LEVEL=debug EOF
Reload the
systemctl
daemon and restart thesystemd-networkd
service for the changes to take effect:systemctl daemon-reload systemctl restart systemd-networkd
Verify your changes:
systemd-delta --type=extended
View the log files by running this command:
journalctl -u systemd-networkd
After debugging the network connections, turn debugging off by deleting the drop-in file:
rm /etc/systemd/system/systemd-networkd.service.d/10-loglevel-debug.conf