Learning OpenStack Networking - Third Edition

Bonding

The use of multiple interfaces can be expanded to utilize bonds instead of individual network interfaces. The following common bond modes are supported:

• Mode 1 (active-backup): Mode 1 bonding sets all interfaces in the bond to a backup state while one interface remains active. When the active interface fails, a backup interface replaces it. The same MAC address is used upon failover to avoid issues with the physical network switch. Mode 1 bonding is supported by most switching vendors, as it does not require any special configuration on the switch to implement.
• Mode 4 (active-active): Mode 4 bonding involves the use of aggregation groups, a group in which all interfaces share an identical configuration and are grouped together to ...