6.5.1

Table Of Contents
You might leave more capacity unreserved to let the host allocate bandwidth dynamically according to
shares, limits, and use, and to reserve only bandwidth that is enough for the operation of a system
feature.
Figure 111. Example Bandwidth Reservation for System Trac on a 10 GbE Physical Network
Adapter
vSphere Distributed Switch
vCenter Server
Host Proxy
Switch
ESXi Host
vmnic0
10 Gbps
Bandwidth reservation for
system traffic on a pNIC
Management
iSCSI
Fault Tolerance
vMotion
Virtual Machine
Total: Less than or
equal to 7.5 Gbps:
(75% of 10 Gbps)
vmnic1
10 Gbps
0.5
1.0
1.0
1.0
0.5
Host Proxy
Switch
ESXi Host
vmnic0
10 Gbps
vmnic1
10 Gbps
Free capacity
6.0
System Traffic
Bandwidth
Reservation,
Gbps
Configure Bandwidth Allocation for System Trac
Assign bandwidth for host management, virtual machines, iSCSI storage, NFS storage, vSphere vMotion,
vSphere Fault Tolerance, vSAN, and vSphere Replication on the physical adapters that are connected to
a vSphere Distributed Switch.
To enable bandwidth allocation for virtual machines by using Network I/O Control, configure the virtual
machine system traffic. The bandwidth reservation for virtual machine traffic is also used in admission
control. When you power on a virtual machine, admission control verifies that enough bandwidth is
available.
Prerequisites
n
Verify that vSphere Distributed Switch is version 6.0.0 and later.
n
Verify that Network I/O Control on the switch is version 3.
n
Verify that Network I/O Control is enabled. See Enable Network I/O Control on a vSphere Distributed
Switch.
Procedure
1 In the vSphere Web Client, navigate to the distributed switch.
2 On the Configure tab, expand Resource Allocation.
vSphere Networking
VMware, Inc. 187