How to increase the maximum Internet speed available for each network card in a large local network?

Question

network hardware

There is a large local area network in the hostel. Lan cables go from the main switch to each room, a Tp-Link router is connected to the cable in the room and distributes the Internet to all devices connected to it. And each device has a speed of 3 Mbps. (If you connect the computer to the cable directly, then the speed is exactly same)
If more than 500 devices throughout the hostel have a speed of 3 Mbps. Is it possible to make at least 10 Mbps on one?

Answer 1

It's just that everyone can't have 3 megabits.
Most likely, there is a shaper on the gateway and, accordingly, you will not receive more than 3 megabits in any case.
Not every device but a router has 3 megabits. Load it with a torrent from one computer and everyone on this router will get a fig. <- I think so

Answer 2

Most likely, the provider's managed switch has a limit on this speed for each port. If you do not work in an office that provides this Internet to a hostel, then there are few ways to intervene.
However, it is worth digging in the direction of the guys working with the network, with computers in your university. This path is thorny and unpromising.

Answer 3

I think you can arrange two cables from the main switch, set up link balancing (in XOR mode, the one that does not require configuration from the switch) and if in this case there are six megabits, then exactly QoS on the port =)

Answer 4

Provided that you are not mistaken and indeed after TP-LINK each device receives 3 Mbps, you can do link aggregation .
To be honest, there is too little information on the structure of the network, but I see two options.
The first one is primitive. After TP-LINK, a router (Mikrotik, OpenWRT) is installed that can combine two or more channels into one.
And the second one is more complicated. Remove TP-LINK. Make virtual interfaces in the router, aggregate / merge them and distribute them further. That is, primitively speaking, emulate 2-3-4 interfaces for a managed switch, combine them and thus increase the channel width. This is if VLANs come over the cable.
Naturally, this is provided that the admins have not set restrictions where necessary, etc.
More information is needed about what TP-LINK receives and distributes further.