ZyXEL GS1900-8HP v2 VLAN 100 and missing 'Switch' section in Web GUI

Installing and Using OpenWrt Network and Wireless Configuration
4

Just save this info to others with the same problem.

The switch section are now into menu ("Network"), "Interfaces".

you will find one TAB (Devices), inside it the "Switch", and the "Configure"

I Hope this help.