Some of the more important updates were:
- Change in the VXLAN UDP port from 8472 to 4789
- Hardware VTEP
- Lots of UI & management enhancements
- Log Insight for NSX now available
However, there is one big consequence that ended being quite the nice surprise.
Change in default license & evaluation key distribution: default license upon install is "NSX for vShield Endpoint", which enables use of NSX for deploying and managing vShield Endpoint for anti-virus offload capability only. Evaluation license keys can be requested through VMware sales.
What this means is huge. If you had vShield in your organization, the upgrade path is NSX. Since you had access to vShield before, you get access to NSX now.
Note: vShield isn't a high requirement. vShield Endpoint is part of Essentials Plus and up. Most enterprise vSphere customers will now see the NSX 6.2.3 download available if they look for the vSphere binaries, even if they choose version v5.5 (that is still the minimum, but please install the latest for your labs)
With this, the "floodgates" have opened and much more people have access to the NSX bits. You still need a real license to play with all the features, but at least the NSX OVA is in your hands and you can start deploying it and learning.
One can expect to see more NSX content out there, and also, I would think a lot of content and community presentations for people upgrading from vShield to this new NSX level.
I think VMware has released this at a good time and hopefully soon I'll add my grain of salt and help everyone that came from being a vSphere admin in learning NSX.