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Chapter 6 - Troubleshooting
ASUS GigaX 1024i+
If the target computer cannot be located, you will receive the message
“Request timed out.”
Using the ping command, you can test whether the path to the switch is
working (using the pre-configured default LAN IP address 192.168.1.1) or
another address you assigned.
You can also test whether access to the Internet is working by typing an
external address, such as that for www.yahoo.com (216.115.108.243). If
you do not know the IP address of a particular Internet location, you can
use the nslookup command, as explained in the following section.
From most other IP-enabled operating systems, you can execute the same
command at a command prompt or through a system administration utility.
6.1.2 nslookup
You can use the nslookup
command to determine the IP
address associated with an
Internet site name. You specify
the common name, and the
nslookup command looks up
the name on your DNS server
(usually located with your
ISP). If that name is not an
entry in your ISP’s DNS table,
the request is then referred to
another higher-level server, and
so on, until the entry is found.
The server then returns the associated IP address.
On Windows-based computers, you can execute the nslookup command
from the Start menu. Click the
Start
button, then click
Run
. In the Open
text box, type the following:
nslookup
Click <
OK
>. A Command Prompt window displays with a bracket prompt
(>). At the prompt, type the name of the Internet address you are interested
in, such as www.absnews.com.
The window displays the associate IP address you know. See Figure 59.
There may be several addresses associated with an Internet name. This
is common for web sites that receive heavy traffic; they use multiple,
redundant servers to carry the same information.
To exit from the nslookup utility, type
exit
and press <
Enter
> at the
command prompt.
Figure 51. Using the nslookup utility
