Testing The Path From A Computer To The Internet - SMC Networks D3CM1604 Administrator's Manual

1. From the Windows task bar, click Start and select Run.
2. In the Open field, type ping followed by the IP address of the cable modem.
3. Click OK. A message similar to the following appears (in this example, 192.168.0.1 is the
IP address entered as part of the ping command):
Pinging 192.168.0.1 with 32 bytes of data
If the destination IP address was contacted successfully, a message similar to the following
appears:
Reply from 192.168.0.1: bytes=32 time=NN ms TTL=xxx
If the path was not contacted successfully, a message similar to the following appears:
Request timed out
If the path is not working properly:
The physical connections may be wrong. Be sure the cable modem's ONLINE LED is

ON. If it is OFF, review "Basic " on page 44.
Check that the corresponding LEDs on the NIC installed in your computer are ON (refer

to the documentation for your NIC). If they are OFF, verify that the Ethernet card driver
software and TCP/IP software are both installed and configured properly on your
computer.
Verify that the IP addresses for the cable modem and your computer is correct and that

both addresses are on the same subnet (for example, 192.168.1.x / 255.255.255.0 ).

Testing the Path from a Computer to the Internet

After verifying that the path between your computer and cable modem is working properly,
use the following procedure to test the path from your computer to the Internet.
To test the path using ping from a Windows PC:
1. From the Windows task bar, click Start and select Run.
2. In the Open field, type cmd and click OK. A DOS command window appears.
3. At the > prompt, type ping -n 10 IPaddress where IPaddress is the IP address of a
remote device (such as your ISP's server) or Web site (such as www.yahoo.com).
4. Press Enter. If the path is working, a reply similar to the one in the previous section
appears. If you do not receive replies:
Confirm that your computer has the IP address of the cable modem listed as the default .

If your computer's IP address is obtained automatically through DHCP, this information
will not be visible in your computer's Control Panel. Verify that the cable modem's IP
address is shown as the TCP/IP default.
Check whether your computer's network address (the portion of the IP address specified

by the netmask) is different from the network address of the remote device.
Troubleshooting Procedures
D3CM1604 DOCSIS 3.0 Cable Modem Administrator Manual
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