fuel-plugin-nsx-t/doc/user/source/usage.rst

Usage

The easiest way to check that the plugin works as expected is to create a network or router using the neutron command-line tool:

[root@nailgun ~]# ssh node-4    # node-4 is a controller node
root@node-4:~# . openrc
root@node-4:~# neutron router-create r1

You can monitor the plugin actions in /var/log/neutron/server.log and see how edges appear in the list of the Networking & Security -> NSX Edges pane in vSphere Web Client. If you see error messages, check the Troubleshooting <troubleshooting> section.

STT MTU considerations

NSX Transformers uses STT protocol to encapsulate VM traffic. The protocol adds additional data to the packet. Consider increasing MTU on the network equipment connected to hosts that will emit STT traffic.

Consider the following calculation:

Outer IPv4 header == 20 bytes

Outer TCP header == 24 bytes

STT header == 18 bytes

Inner Ethernet frame == 1518 (14 bytes header, 4 bytes 802.1q header, 1500 Payload)

Summarizing all of these we get 1580 bytes. Consider increasing MTU on the network hardware up to 1600 bytes.