Designing a network for load balancing and failover for vSphere Distributed Switch
The load balancing and failover policies that are chosen for the infrastructure can have an impact on the overall design. Using NIC teaming, we can group several physical network switches attached to a vSwitch. This grouping enables load balancing between the different Physical NICs, and provides fault tolerance if a card failure occurs.
The vSphere distributed vSwitch offers a load balancing option that actually takes the network workload into account when choosing the physical uplink. This is route based on a physical NIC load. This is also called Load Based Teaming (LBT). We recommend this load balancing option over the others when using a distributed vSwitch. Benefits of using this load balancing policy are as follows:
It is the only load balancing option that actually considers NIC load when choosing uplinks.
It does not require upstream switch configuration dependencies like the route based on IP hash algorithm...
