We will now see network bonding in our cluster. There are several types of bonding options available. But only balance-rr, active-backup, and LACP (802.3ad) are most widely used. The balance-rr option provides the round robin method to increase overall interface bandwidth with failover. The balance-rr option does not require any special network switch. Just about any switch can be used to make this work. The major drawback of balance-rr is waste of data packets. LACP is known as industry quality bonding.

In this book, we will only look at the LACP bonding protocol. But to give you an idea of how a balance-rr bonding looks like, the following diagram shows balance-rr bonding between Proxmox nodes and Ceph distributed storage clusters. In this example, the Proxmox public network is on 192.168.10.0/24, while the storage backend is on a private 192.180.201.0/24 subnet. Separate switches are used for the Ceph storage network to increase redundancy. Each Proxmox node...