Trouble Adding Second Router

[JanZizka]

Community,

So, right up front I'm trying to add a second wireless router in my upstairs area but am having trouble configuring it to work.

My set up is as follows, cable service comes in in the basement and enters my cable modem (Motorola Docsis 3.0 P/N: 545100-009-00) and then I want to put my old router (ASUS RT-N56U) and then have it then enter the switch (Netgear ProSafe 8 Port Gigabit Switch) which feeds ethernet jacks all over the house.

So I was able to put my old router (ASUS RT-N56U) down in my basement in front of the switch and it worked great, activated all the ethernet jacks (I checked three of them). Enabled DHCP on this router and it worked great.

The problem is my new router (ASUS RT-AC68U) and getting it to work. So once I added it to one of the ethernet jacks and started the set up process it automatically detected that it's IP address was in conflict with the first router (RT-N56U) so it automatically sets it's IP address different with a different subnet. So, I tried to adjust it's IP address to make sure it's on the same subnet as the first router (I believe this is required) but when I try to change the IP address I keep getting this error message saying something like "The LAN and WAN need to have a different IP address and subnet number".

So, any idea what gives here? Maybe I should not let it automatically assign it's IP address?

Appreciate any help man.

Chris

 

[nukemaster]

If you have multiple routers in the house it is HIGHLY recommended to have only ONE dealing with HDCP.

So the one attached from the cable modem should do this as it does now.

So you will have

Modem [Ethernet] - > [WAN]Old router(DHCP/Firewall/ect)[LAN] - > [Any port]Switch for wired systems[any port] -> [LAN]New router with HDCP OFF.

Please note you have to use the LAN port not WAN port in this configuration(and the old router will give out all the ips for the house). Before doing this connect just a computer to the router and assign an IP address so you can manage the wireless settings from any system in the house. If your router is 192.168.0.1 use 182.168.0.2 for the new router.

This setup prevents creating multiple networks within the same building and allows all systems to talk to each other.

If you wanted to separate the networks you would use the WAN port on the new router, but make the router have its own ip range to avoid this issue(lets say 192.168.1.XXX). Some routers will actually let you have the WAN and LAN side with the same Ip range, but you seem to not be able to.