Innoband 8520-C1, Руководство пользователя

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8520-C1 User Manual
74
Diagnosing Problem using IP Utilities
Ping
Ping is a command you can use to check whether your PC can recognize other
computers on your network and the Internet. A ping command sends a message to
the computer you specify. If the computer receives the message, it sends messages
in reply. To use it, you must know the IP address of the computer with which you are
trying to communicate.
On Windows-based computers, you can execute a ping command from the Start
menu. Click the Start button, and then click Run. In the Open text box, type a
statement such as the following:
ping 192.168.1.1
Click OK. You can substitute any private IP address on your LAN or a public IP
address for an Internet site, if known.
If the target computer receives the message, a Command Prompt window is
displayed:
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 device is working
(using the preconfigured 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.
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 in 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, and 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 that you are interested in, such as
www.microsoft.com.