I have the following home network setup:
Typical Wireless router which is connected to WAN/Internet and its LAN IP is 10.0.0.1. DHCP is ON with the address pool set to 10.0.0.100 to 10.0.0.199. I can connect to this router with wired and wireless devices without any issues (i.e access internet etc).
From one of the open LAN ports in the router in the ground floor, I connected an ethernet cable and the other end is connected to a 8 port switch which is located in one of the rooms (say room number 101 for identification sake) in the first floor. There are other devices like a desktop PC and second wireless router (with its DHCP ON or OFF) connected to this switch and all of them (including the devices attached to the second wireless router) can connect to the internet.
So far so good.
Now I wanted WI-Fi in another room (say room number 102) in the first floor so I ran an ethernet cable from the switch in room 101 to room 102 and connected second wireless router. Now if I attach devices to this wireless router I am not able to connect to internet in the attached devices. I have also verified the cable is not faulty as I am able to access internet if connect to this ethernet cable directly.
What else could be the issue? Is length of cable an issue? The rooms 101 and 102 are approximately 30 to 40 feet apart. From what I understand and read in other forums this distance should be fine for extending the LAN.
What is surprising is in room 101, with a shorter cable from the switch to the same second wireless router, the devices attached to it are able to access the internet.
Can somebody explain what's happening here?