How to hard reset Cisco 1721

For routers from the "Linksys by Cisco series"

Resetting your router to factory defaults

1. Find the router reset button located on the back of the router.
2. Press and hold the Reset button for 10 seconds.
If holding the button for ten seconds did not hard reset the router, try hoilding the button for 30 seconds.
Some old devices require holding the button for longer perionds.

For routers from the "Linksys by Cisco series"

The default factory settings are:

Default username: blank
Default password: admin
Default IP address:
Keep in mind that after a hard reset has been completed, you might have difficulties logging in your router through WiFi. You must wire your computer directly to the router's switch to port 1,2 3 or 4

Similar routers from Cisco: