I have a fiber connection through Hiper in denmark. Firmvare version is 1,20
if Vlan 101 is supported, i don't need the xyxel router that Hiper has send me to use.
I think it is supported, as i saw this
https://global.dlink.com.sg/faq/faq_pdfs/DIR-878/How-to-configure-VLAN-on-DIR-878.pdf