I'm looking for some wired client isolation on our public IPv4 VLAN. Since we have a
/23 block, isolation is a kind of feature that's really useful.
But we don't have switches capable of PVLAN. To circumvent the issue and avoid wasting public IPv4 addresses with /30 links, I've come across a solution looking through the web that involves setting up a port on a given switch to be the "uplink port" with some untagged VLANs, and just a single VLAN on the access ports.
Port 24: VLAN 100,101,102,103,104 => Untagged Port 01: VLAN 101 => Untagged Port 02: VLAN 102 => Untagged Port 03: VLAN 103 => Untagged Port 04: VLAN 104 => Untagged
Finally the question: will this really work as expected? If yes how can I cascade switches using this approach?