Linksys AC3000 User Manual page 18

You can also enter your range extender's IP address in a browser. Find the IP address on your
router's administrative interface.
Note—If you are not connected to your extended network you will get a page alerting you that
you haven't connected to the extender. The page will ask whether you are trying to set up a new
range extender or access settings on a range extender you already set up.
Sometimes you will get a "404 Not Found" error page. If that happens, clear your browser cache
and try again.
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