Diagnostics and Troubleshooting
192
AC1600 WiFi Cable Modem Router
TCP/IP Network Not Responding
Most TCP/IP terminal devices and routers provide a ping utility for sending an echo request
packet to the designated device. The device responds with an echo reply to tell whether a
TCP/IP network is responding to requests.
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 computer:
1. From the Windows taskbar, click the Start button and select Run.
2. In the field provided, type ping followed by the IP address of the modem router, as in this
example:
ping 192.168.0.1
3. Click the OK button.
A message such as the following one displays:
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, the network might not be configured correctly. Do
the following:
• Verify that the Ethernet card driver software and TCP/IP software are both installed
and configured on your computer or workstation.
• Verify that the IP address for your modem router and your computer are correct and
that the addresses are on the same subnet.
Test the Path from Your Computer to a Remote Device
After you verify that the LAN path works correctly, test the path from your computer to a
remote device:
1. From the Windows toolbar, click the Start button and select Run.
2. In the field provided, type
ping -n 10 IP address
where IP address is the IP address of a remote device such as your cable service
provider’s DNS server.
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