Troubleshooting
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AC3200 WiFi Cable Modem Router
Is your modem router too far from your computer, or too close? Place your computer
near the modem router, but at least 6 feet (1.8 meters) away, and see if the signal
strength improves.
Check for sources of WiFi interference that might block the signal. See Position Your
Modem Router on page 11.
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 using the ping utility in your computer or workstation.
Test the LAN Path to Your Modem Router
You can ping the modem router from your computer to verify that the LAN path to your
modem router is set up correctly.
To ping the modem router from a Windows-based computer:
1. From the Windows toolbar, click Start and select Run.
2. In the field provided, type ping followed by the IP address of the modem router, as in this
example:
ping www.routerlogin.net
3. Click the OK button.
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 might be experiencing one of the following
problems:
• Wrong physical connections
For a wired connection, make sure that the numbered LAN port LED is lit for the port to
which you are connected.
Check that the appropriate LEDs are on for your network devices. If your modem router
and computer are connected to a separate Ethernet switch, make sure that the link LEDs
are lit for the switch ports that are connected to your computer and modem router.
• Wrong network configuration
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