Thank you fro the prompt answer,  @Clive_A 

I found the setting to set the PVID, however I do not think this is what I want to obtain.

If I understand this right if I configure a PVID on each port, then that port will "serve" only the corresponding VLAN (since everything downstream is unmanaged). In my example I could have floor 1 on a VLAN and floor 2 on another VLAN.
However, what I'd like to accomplish is that all ports serve all VLANs. Someone else suggested that this would be accomplished by having a managed switch downstream of the router with ports configured in trunk mode: is that right? Is it necessary to introduce a managed switch? Can the router not act as one?

Thank you for your help

Thanks for confirming this. I just have some more questions/things to confirm, sorry, but I'm new to this and really thankful for the help.

1. If I insert a managed switch downsteram of the router, but upstream of the unmanaged switches (check my previous posts, I added the inline image of my network setup), I can set the ports of the managed switch to:
   • access -> but then each port will only serve one single VLAN and this is not what I need
   • trunk -> but then the client devices will need to be configured to use a specific vlan, is that right? Otherwise if i keep everything unmanaged only the PVID confiugred VLAN will be accessible which is not what I need
2. If this is right, then I'm beginning to wonder if using VLANs is the right way to obtain what I want.
   In the end what I would like to happen is that the router has multiple networks configured (192.168.1.1/24, 192.168.2.1/24, 192.168.100.1/24) and a client would use one of them based on their interface, independently of the physical location/port they are using. For example I should be able to configure a device with static IP 192.168.1.10 and gateway 192.168.1.1, another with 192.168.100.20 and gateway 192.168.100.1 and another in DHCP receving IP 192.168.2.30 and gateway 192.168.2.1 and they would all be able to talk between them via the router.

Thank you again for your help

KJK wrote

  @GioBonvi 

 

It looks like you have the right understanding of the theory, but for some reason you hope to use unmanaged switches. Well, give yourself a favour and forget about this idea. Use only managed switches with VLANs. A VLAN is a broadcast domain, but an unmanaged switch does not understand VLANs. Using unmanaged switches with VLAN will not take you far and will result in issues.

Thank you for the suggestion

When I started looking into this I simply wanted to improve my existing network setup, which includes lots of unmanaged switches, so I just hoped that it would be feasible with minimal infratructural changes. 

At the beginning I did not know about nor explicitly wanted to use VLANs or managed switches: they simply popped up as I explored this option and I tried to understand how they worked and whether the provided a suitable solution for my problem. 

Right now I would say they don't: in fact it looks to me tha whether I replace all my unmanaged switches with managed ones or not, I would still not get what I seek, that is: conencting a device to any port and have it joining one of the subnets according to its network configuration (e.g. On a certain port a device configured with static 192.168.100.10/24 would talk with the router at 192.168.0.1 and on the same port another device configured sifh 192.168.1.20/24 would talk with the router at 192.168.0.1). 

The closest thing I got is to configure the router's and any managed switches' ports in trunk mode and configure each device to use the appropriate vlan tag (which unforunately is not a feasible solution in my environment since not all device supporto vlan tagging)

The question I'm trying to answer has now become: is this possibile in any way? (using VLANs or not I do not really care) 

Thank yi uagain for helping me udnerrand everything better