Hello we are currently using bonds set up like this: Code: auto bond0 iface bond0 inet manual slaves enp8s0f0 enp8s0f1 bond_miimon 100 bond_mode 802.3ad bond_xmit_hash_policy layer2+3 those work, except I read for cluster that type of bond should not be used: https://pve.proxmox.com/pve-docs/pve-network-plain.html If you intend to run your cluster network on the bonding interfaces, then you have to use active-passive mode on the bonding interfaces, other modes are unsupported. When I change over to active-backup [ used pve > network and restarted node] , the network does not work. no ping out etc. Code: auto bond0 iface bond1 inet manual slaves enp8s0f0 enp8s0f1 bond_miimon 100 bond_mode active-backup We are using a managed switch . the two wires connect to lagged ports. I've tried the 6 different hash types. Does anyone have a clue on what to try next?