SG105E, Deco, VLAN, Isolation
System I am trying to create
Internet/ModemRouter -> SG105E -> Vlan 2 ( port 2) - User xxxxxx, own network
-> Vlan 3 (port 3,4,5) My Network Wifi and guest wifi
Port 3 -> to Deco S7 Mesh wifi
Port 4 -> dumb switch and PCs, printers
Port 5 -> IOT
My Supplied Modem Router has Wifi turned off as I want to use the Deco S7
The Modem\Router has no Vlan support
Can I use the SG105e to create a simple isolation via a VLAN
Port 1 to Modem
Port 2 to User XXX
Port 3,4,5 My network including Deco S7
Reading up I have believe I can not use the "Port Based Vlan" so Q Vlan using Untagged ports ?
Does this seem correct , lots of sample, then lots of comments that argue the point, so I am confused about what will work and what will not.