19216811.liveTroubleshooting
136
CENTRIA WNDR4700/WNDR4720
Restore the Factory Settings and Password
This section explains how to restore the factory settings, changing the router’s administration
password back to
password
. You can erase the current configuration and restore factory
defaults in two ways:
•
Use the Erase function of the router (see
Erase
on page
97).
•
Use the Reset button on the back of the router. See
Factory Settings
on page
139. If you
restore the factory settings and the router fails to restart, or the green Power LED
continues to blink, the unit might be defective. If the error persists, you might have a
hardware problem and should contact technical support at
.
Troubleshoot Your Network Using the Ping Utility
Most network devices and routers contain a ping utility that sends an echo request packet to
the designated device. The device then responds with an echo reply. You can easily
troubleshoot a network by using the ping utility in your computer or workstation.
Test the LAN Path to CENTRIA
You can ping the router from your computer to verify that the LAN path to your router is set up
correctly.
To ping the router from a running Windows computer:
1.
From the Windows toolbar, click
Start
, and then select
Run
.
2.
In the field provided, type
ping
followed by the IP address of the router, as in this example:
ping www.routerlogin.net
3.
Click
OK
.
You should see a message like this one:
Pinging <IP address > with 32 bytes of data
If the path is working, you see this message:
Reply from < IP address >: bytes=32 time=NN ms TTL=xxx
If the path is not working, you see this message:
Request timed out
If the path is not functioning correctly, you could have one of the following problems:
•
Wrong physical connections
For a wired connection, make sure that the numbered LAN port LED is on for the port to
which you are connected.