There is a small office. There are a couple of dozen computers (mix of PC and Mac), connected in one local network.
There are two router from the same manufacturer. The approximate scheme echobrain in the diagram below:
A simplified scheme of the network
The distribution of IP is through DHCP.
80% of the cars working as it should. But some of them sometimes lose the Internet. Spontaneously.
When you go into the connection settings, instead of the standard subnet 192.168.31.* for some reason, have a kind of 169.*.*.*
This may happen with a Mac and a PC.
On Windows usually help the team
After entering these commands on vindovsky machine, with some probability all can suddenly earn on all machines at once (this was exactly one time, maybe this is not the reason and just coincidence). Or just for her.
Assigning a static IP address and IP router in marshrutizatora in the connection settings of the machine is also sometimes either works or not.
Rebooting the router also either works or does not work, from situation to situation.
I have suspected the router, but I would like to make sure that there are no other possible situations and problems, price than to change it. For example, I heard that the car can begin to broadcast to the network that it is the most important here and it is starting to batter others. Like it or not - I do not know, do not have sufficient experience in this.