How to disable IPv6 on a Linksys router
Step 1:
On a phone or computer connected to the router you are configuring open your browser and visit 192.168.1.1 OR 192.168.0.1 OR 192.168.2.1 (Exact address may differ - Check the sticker on the router itself to confirm).
Step 2:
Log into your router. If you have not changed the default login information and you are unsure - look for a sticker on the router itself for the default login.
Step 3:
Select "Connectivity"
Step 4:
Under "Connectivity", select the "Internet Settings" tab.
Step 5:
Select "IPv6' then uncheck the Enabled checkbox beside "IPv6 – Automatic".
Step 6:
Select the "OK" button at the bottom and restart your router if it does not to do so automatically.