Why is vlan not working?

Question

Computer networks

Colleagues, hello. Does anyone use HP switches on the network?
I do not understand why VLAN does not want to work. The bottom line is the following: there are several switches interconnected by an aggregated channel (trunk in HP terminology). Users are connected to the switches, and several wi-fi routers. They are in different subnets (users and wi-fi). It is necessary to remove wi-fi in a separate VLAN. I set up ports on the switches, but as soon as I set a separate VLAN for wi-fi, they stop seeing the network. I would think that the problem is with routing, but wi-fi routers do not see each other, and they are on the same subnet, that is, they do not need a gateway. Everything seems to be set up correctly, but maybe I don’t know some subtleties? I did not reboot the switches after applying the settings, and did not save the configuration to permanent memory.

Answer 1

trunk on VLAN is also beaten already? Judging by the diagram - yes, judging by the description - no.

Answer 2

It's hard to say without configs, but I would start by looking at the mac addresses in the vlan, are there mac addresses from neighboring switches in the switches?

Answer 3

but as soon as I set a separate VLAN for wi-fi, they stop seeing the network.

Please describe the steps.
What do you do step by step to transfer routers to a separate vlan?