Before you install or upgrade NSX, consider your network configuration and resources. You can install one NSX Manager per vCenter Server, one instance of Guest Introspection per ESXi™ host, and multiple NSX Edge instances per datacenter.


Table 1. Hardware Requirements




Disk Space

NSX Manager

16 GB (24 GB with certain NSX deployment sizes*)

4 (8 with certain NSX deployment sizes*)

60 GB

Guest Introspection

1 GB


4 GB

As a general guideline, you should increase NSX Manager resources to 8 vCPU and 24 GB of RAM if your NSX managed environment contains more than 256 hypervisors or more than 2000 VMs.

For specific sizing details contact VMware support.

For information about increasing the memory and vCPU allocation for your virtual appliances, see Allocate Memory Resources, and Change the Number of Virtual CPUs in vSphere Virtual Machine Administration.


These are the recommended versions of VMware products.

  • VMware vCenter Server 5.5U3

  • VMware vCenter Server 6.0U2

Client and User Access

  • If you added ESXi hosts by name to the vSphere inventory, ensure that forward and reverse name resolution is working. Otherwise, NSX Manager cannot resolve the IP addresses.

  • Permissions to add and power on virtual machines

  • Access to the datastore where you store virtual machine files, and the account permissions to copy files to that datastore

  • Cookies enabled on your Web browser, to access the NSX Manager user interface

  • From NSX Manager, ensure port 443 is accessible from the ESXi host, the vCenter Server, and the NSX appliances to be deployed. This port is required to download the OVF file on the ESXi host for deployment.

  • A Web browser that is supported for the version of vSphere Web Client you are using. See Using the vSphere Web Client in the vCenter Server and Host Management documentation for details.