I just recently decided that I needed to expand my network at home, too much traffic on the wi-fi, which would lessen once I hard wire these devices.
So, here’s how it goes. I have a cable modem, that plugs in to the wan Ethernet port on my router, on the other side of the router plugged into one of the local network ports on the router is a 16 port 1Gb unmanaged switch. From there I have two legs that run to opposite rooms upstairs. THe one leg that goes to my Son’s room is attached to a router that is in bridge mode. Works like a champ.
The second leg of the network goes into the master bedroom, where I spilt it off to two more unmanaged switches, one 5 port and the other an 8 port. The 8 port was the last thing I added to the network before it collapsed.
All the lights were lit and indicating network traffic. So it looked like everything worked, but I couldn’t connect via wi-fi or an ethernet cable into one of the switches.
So, this is a big problem, my wife is in School, my Son and Daughter are in school, and I’m taking online training, and looking for work. Everyone was without internet. Two days. It took me two days to figure out that the last unmanaged switch was causing the network to crap out. You see when I was plugging in the cables from my devices to the switch, I got mixed up and made a loop by connecting a cable to one port on the switch, and connecting the other side to another port on the same unmanaged switch.
Well, let me tell you, that was a really simple error. Caused lots of network traffic, more like a traffic storm. And since it was unmanaged, there was no Spanning Tree process taking care of the loop.
I unplugged the cable and eventually all the devices came back online and all I need to do is fix the DNS server, and life will be great.
Careful when expanding any network, or installation, make sure you plug the right plugs into the correct sockets.