Suppose I have 3 vlans 100,200,300. Port 24 is an uplink and is tagged for all VLANs. All other ports a switched toghether by switch chip. Some ports are untagged VLAN 100. Others are on VLAN 200. Some on VLAN 300.
All VLANs are in same subnet 192.168.1.0/24.
Now I want one port to belong to all VLANs untagged. How this can be accomplished?
I know this is not the scope of VLANing. The idea is to have vlan for users, vlan for guests and vlan for management. On one port will be an administration computer which should have access to all vlans, like in a simple local LAN. There is a router at uplink which can do ebtables to forward, but I would not want to do this on that router.