On which level is the virtual machine system traffic reservation defined in Network I/O Control version 3?

Uplink configuration in NIOC handles physical NIC traffic shaping, not where VM system traffic reservations are defined.

In NIOC v3, traffic reservations for VM system traffic are configured at the vSphere Distributed Switch level. This allows a consistent bandwidth reservation policy to be enforced across every host attached to the switch, rather than being scoped to a single host or portgroup. This is a key architectural change introduced in NIOC v3 compared to earlier versions.

Distributed portgroups control policies like VLAN and security settings but are not the level at which VM system traffic reservations are defined in NIOC v3.

Host-level settings do not define NIOC v3 VM system traffic reservations; the distributed switch is the authoritative configuration point.