• Span the transport zone across all the ESXi hosts or clusters that the end customers’ VMs must reside on so that all specified hosts can service the required network traffic.

• Verify that the transport zone is extended to the NSX Edge clusters so that East/West traffic can get to the NSX Edge cluster before traversing the North/South edge service gateways.

• Isolated transport zones can be used to improve security where required. These transport zones are only applied to the required clusters.

• VMware NSX provides flexibility for the VXLAN transport which does not require complex multicast configurations on the physical network to be in place. This flexibility is provided through different VXLAN replication modes you can choose depending on your network fabric. They are:

o Unicast – All replication occurs using unicast. This is applicable to small deployments.

o Multicast– The entire replication is offloaded to the physical network and requires IGMP querier as well as multicast routing for L3 (PIM). It is the host that provides the necessary querier function. However, an external querier is recommended for manageability.

o Hybrid – Local replication is offloaded to the physical network, while remote replication occurs through unicast. This is the most practical replication mode without the complexity of multicast mode and only requires IGMP snooping/querier and does not require L3 PIM.

o All VXLAN replication modes require an MTU of 1,600 bytes.