Use Git to track /etc/systemd/network/ and /etc/NetworkManager/system-connections/ . This helps spot accidental changes.
ip link set bond0 down → change config → ip link set bond0 up
If you must change bond parameters dynamically, do so via the network management daemon itself, not direct sysfs.
: If you need to change core parameters (like the bonding mode), you often must manually delete the existing interface before applying the new configuration: sudo ip link del dev bond0 sudo netplan apply Use code with caution. Copied to clipboard The "Safety" Reboot : If you need to change core parameters
grep -r . /sys/class/net/bond0/bonding/ 2>/dev/null | grep -v "unsupported"
Explore different network management tools or utilities. Some might offer more flexibility or better support for custom configurations.
Separate bridge management from bond management. Define the bond in one file, the bridge in another, and ensure the bridge is created after the bond is fully up (use Requires= and After= in systemd). Some might offer more flexibility or better support
This forces the bond to be fully torn down. The network daemon then applies the fresh configuration without needing to “revert” anything.
If you deliberately manage the bond via scripts and want systemd-networkd to leave it alone:
ip link set bond0 master br0 ip link set bond0 up 2. Check for "Double Configuration" the bridge in another
There might be conflicts in the network configuration that prevent the custom parameters from being applied.
Understanding the "bond0: reverting custom parameters" Error in Linux Networking