Let’s say you want high availability at the NIC level and failover capacity to the CVM and user VMs.
We recommend using balance-slb to take advantage of all adapters.
Balance-tcp is a load balancing method that increases host and VM bandwidth utilization beyond a single 10 Gb adapter by balancing each VM NIC TCP session on a different adapter. Also used when network switches require LACP negotiation."
Advantages of Bond Mode for balance-slb
Balance-slb bond mode in OVS (Open vSwitch) takes advantage of all the links.
Rebalance VM traffic from the interface that is used extensively to less used interfaces. When the configurable bond-rebalance interval expires, OVS uses the measured load for each interface and the load for each source MAC hash to spread traffic evenly among links in the bond.
Traffic from some source MAC hashes may move to a less active link to more evenly balanced bond member utilization.
Here is an article that describes the impact of the change and the steps on how to make the network changes: AHV | Configuring Load Balancing active-backup and balance-slb modes
Notes: Before making any network changes, please be sure the cluster can tolerate a single node failure. This can be done by checking from the Prism's Home page for Resiliency status. It must be showing a Green OK. Otherwise, please do not make any changes until the resilience issue is resolved. It is highly recommended to do it during a maintenance window after hours.
The networking described in the AHV Best Practices Guide covers a wide range of the scenarios that Nutanix administrators encounter every day. However, when the defaults don't match customer requirements, you’ll want to use this advanced networking guide.