Bond0 Reverting Custom Parameters For Bridges And Bonds Is Not Supported //top\\ Jun 2026

A CentOS Stream 9 server running systemd-networkd showed the error every 30 minutes. The bond was mode=4 (802.3ad) with two 10GbE interfaces. Monitoring revealed a security agent that periodically ran a script to “optimize” network settings—including writing a custom xmit_hash_policy to /sys/class/net/bond0/bonding/xmit_hash_policy .

bond0: reverting custom parameters for bridges and bonds is not supported occurs when you run netplan try A CentOS Stream 9 server running systemd-networkd showed

configuration for a bond-bridge setup to ensure your syntax is correct? A CentOS Stream 9 server running systemd-networkd showed

Then mask the bond from automatic management: A CentOS Stream 9 server running systemd-networkd showed

Once a bond is enslaved to a bridge, its operational parameters are often "locked" to ensure the bridge can manage traffic flow without the underlying bond changing its behavior mid-operation.