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Deployment Guide

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38 ScaleIO/VxFlex OS IP Fabric Best Practice and Deployment Guide with OS10EE | version 1.0
4.3 Scaling beyond 16 racks
The proof-of-concept scaling that Figure 25 shows allows four 16-rack pods connected using an additional
spine layer to scale in excess of 1,000 nodes with the same oversubscription ratio. This scenario reduces the
number of racks available per pod to accommodate the uplinks required to connect to the super spine layer.
It is important to understand the port-density of switches used and their feature sets’ impact on the number of
available ports. This directly influences the number of switches necessary for proper scaling.
Scaling out the existing networking topology
4.4 Configure Bandwidth Allocation for System Traffic
Assign bandwidth for host management, virtual machines, iSCSI storage, NFS storage, vSphere vMotion,
vSphere Fault Tolerance, Virtual SAN 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 the availability of sufficient bandwidth.
1. In the vSphere Web Client, navigate to the distributed switch.
2. On the Configure tab > Resource Allocation > System Traffic.
3. Select the traffic type according to the vSphere feature that you want to provision and click Edit.
a. The network resource settings for the traffic type appear.
4. From the Shares drop-down menu, edit the share of the traffic in the overall flow through a physical
adapter. Network I/O Control applies the configured shares when a physical adapter is saturated.
a. You can select an option to set a pre-defined value, or select Custom and enter a number from 1
to 100 to set another share.
5. In the Reservation text box, enter a value for the minimum required bandwidth for the traffic type.