Checking the LAN
First, you need to check that the computer can reach to other computers in the same
segment, as follows:
1. Set the default gateway to the host on which you are setting up the network interface.
If there is a server or a router which acts as a gateway, enter the address of the server
or the router. If there is no gateway, enter the IP address of your computer as a gateway
address.
2. Assume that you want to reach to the computer having the IP address
"192.168.100.101". Check that the computer is reachable by "pinging" it from the
command line:
ping 192.168.100.101
3. If the computer is reachable, you can see the following result (the exact form of the
message depends on your operating system, and the time may vary):
64 bytes from 192:168:100:101:icmp_seq=0. Time=34.ms
4. If the computer is unreachable, you may see something like this:
PING 192:168:100:101:56 data bytes
If you press Ctrl-C, you may see something like this:
192:168:100:101 PING Statistics
3 packets transmitted, 0 packets received,
100% packet loss
Again, the exact wording of the message you see may differ from this, depending on
your operating system. If you cannot "ping" the computer, check the following:
❏ The address in the ping command is correct.
❏ The Ethernet connection to the computer has been made correctly, and all hubs,
routers, etc. are switched on.
Setting and checking the new IP address
To set the new IP address of the network interface which you have obtained from your
network administrator, use the ping command and arp command with the -s flag (create
an ARP entry).
Note:
In the following procedure, we assume that the MAC address of your network interface is
00:00:48:93:00:00 (hexadecimal), and that the IP address which you will be assigning is
192.168.100.201 (decimal). Substitute your values for these addresses when you type in the
commands.
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Tips for Administrator
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