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.
The following procedure turns on network debugging by adding a drop-in file in /etc/systemd
to customize the default systemd configuration in /usr/lib/systemd
.
Run the following command as root to create a directory with this exact name, 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/10-loglevel-debug.conf << "EOF" \[Service\] 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 that your changes took effect:
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