In addition to this upgrade guide, VMware publishes various other documents that support the upgrade process.

Release Notes

Before beginning the upgrade, check the release notes. Known upgrade issues and workarounds are documented in the NSX release notes. Reading the upgrade issues before you begin the upgrade process can save you time and effort. See https://www.vmware.com/support/pubs/nsx_pubs.html.

Product Interoperability Matrix

Verify interoperability with other VMware products, such as vCenter. See the VMware Product Interoperability Matrix at http://partnerweb.vmware.com/comp_guide/sim/interop_matrix.php on the Interoperability tab.

Verify support for the upgrade path from your current version of NSX to the version that you are upgrading to. On the Upgrade Path tab, select VMware NSX from the product menu.

Compatibility Guide

Verify the compatibility of partner solutions with NSX at the VMware Compatibility Guide, at http://www.vmware.com/resources/compatibility/search.php?deviceCategory=security.