Triplett Low Voltage Pro Bedienungsanleitung PDF herunterladen (Seite 26)

Appendix A. Ping and TCP/IP debugging tools

Who should read this: If you spend time working with Ethernet and

network devices, this section could be of help to you.

Ethernet Software Level (TCP/IP): Once the LVPro has estab-

lished that your cables and network devices are working at the

hardware level, your next step is to checkout the software level of

your network. Understanding the basics of TCP/IP and gaining a

familiarity with your operating system's built-in network debugging

tools helps you diagnose and troubleshoot network problems.

Because Ethernet is so common, Windows and many Linux systems

have built-in tools to help you debug network problems.

These debugging programs are executed at the command line

prompt of the operating system.

ping

The most popular Ethernet debugging program is called “ping”.

Ping sends out a packet to an address that you specify and waits

for a reply. Although very simple to use, ping is extremely powerful

because it works at the IP level and often will respond even when

the higher level layer cannot.

USE: Determine if a workstation is connected to the network. Rout-

ers, servers and workstations are identiﬁed by an "ip" address and

possibly a "name". The ip address is a numeric string whose format

is referred to as "dotted decimal" (example: 192.168.0.0.). The

"name" can be any name given to a computer when it is installed or

an internet URL. EXAMPLE OF USE: #1: I have problems connect-

ing to the Byte Brothers website from a workstation. I know the DNS

name of the website is “www.bytebrothers.com”. At the worksta-

tion’s Command Prompt, enter “ping www.bytebrothers.com”. If

connected, I will receive back bytebrother.com's IP address (e.g.

207.115.64.64) and the roundtrip time of my ping packet. #2) I am

having a problem with one of my workstations communicating to

a server. I know the server's ip address is 192.168.1.100. I enter

“ping 192.168.1.100” on the workstation’s Command Line. If the

server is connected I will receive a response to my ping. Ping notes:

If you want to ping another workstation or server and you do not

know its DNS name or IP address use ipconﬁg (below). To learn all

of the ping command’s option, enter ping /?.

ipconﬁg

USE: Determine the IP address and other related information about

a workstation.

Enter ipconﬁg /? at the prompt to display the options possible with

this command. The two most common entries: ipconﬁg and ipconﬁg

/all.

EXAMPLES OF USE: I want to ping a remote server but I do not

know its ip address. Go to the server and at the command line

prompt enter “ipconﬁg”. The server's IP address will be displayed.

Return to the earlier workstation and perform the ping test to this

address.

tracert

USE: Determines how many router hops a packet took to reach its

PINGING

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