This is a blog post written in Japanese, and it appears to be discussing the setup of a virtual network using VMware NSX. The author is describing how to create a distributed switch (DSwitch) and assign ports to it, as well as how to configure VLANs and security settings.

Here is a brief summary of the steps described in the blog post:

1. Create a new DSwitch.

2. Assign ports to the DSwitch.

3. Configure VLANs for the ports.

4. Set security settings for the ports.

5. Add hosts and VMs to the DSwitch.

6. Migrate virtual machines to the DSwitch.

The author also mentions that they will be introducing NSX-V and NSX-T in future posts, so it seems that this is just the beginning of a series of articles on using NSX for virtual networking.