End of General Support for VMware NSX for vSphere 6.1.x has been extended by 3 months to January 15th, 2017. This is to allow customers to have time to upgrade from NSX for vSphere 6.1.7, which contains an important security patch improving input validation of the system, to the latest 6.2.x release. For recommended upgrade paths, refer to the latest NSX for vSphere 6.2 Release Notes and the VMware Interoperability Matrix.
Migration of Service VM (SVM) may cause ESXi host issues in VMware NSX for vSphere 6.x (2141410). See also the CAUTION statement in the 6.2.3 Administration Guide.

Do not migrate the Service VM (SVM) manually (vMotion/SvMotion) to another ESXi host in the cluster.
The latest versions of vSphere 5.5 and 6.0 inhibit vMotion migration. However, storage vMotion is not blocked, and such movement may lead to unpredictable results on the destination host.

vCenter Server 6.0 restart/reboot results in duplicate VTEPs on VXLAN prepared ESXi hosts (2144605). The NSX-side update to protect against this issue is available in 6.2.3. This issue will be resolved fully in a future version of vCenter.

Top Issues:

Important new and changed KBs with NSX for vSphere 6.2.3. For more information, see Troubleshooting VMware NSX for vSphere 6.x (2122691).

Important new and changed documentation with NSX for vSphere 6.2.3 – see the NSX Documentation Center

How to track the top field issues