4.10 ESXi Hosts
vSphere Replication Manager automatically opens necessary ports on each ESXi host to enable incoming replications from vSphere Replication Servers over NFC service and outgoing replication data from vSphere Replication Agent and vSCSI filter already present in the VMkernel to Cloud Proxies.
Figure 12. Provider vSphere Replication Traffic
vSphere allows specifying which VMkernel ports should be used for both traffic types, so it is possible to dedicate specific network uplinks.
Figure 13. VMkernel vSphere Replication Traffic Types
In most cases vSphere Replication traffic will share the same uplink with other traffic types (Management, vSphere vMotion, and so on). In such cases, VMware vSphere Network I/O Control on VMware vSphere Distributed Switch™ can be used to define quality of service by setting shares, reservations, or limits.
Figure 14. Network I/O Control Traffic Shaping of vSphere Replication Traffic Type
