Lab 4: Fall 2008

Using ifconfig and ARP

Ifconfig is a key command in linux networking since it will allow you to configure interfaces. type man ifconfig to read about it.

For instance, the command >ifconfig eth0 172.16.32.88 netmask 255.255.224.0 will set up the 0 interface with an ip address.

Consider this command > ifconfig eth0:1 172.16.32.88 netmask 255.255.224.0

for the first part of the lab, explain what is going on in that command and why?

At the command line of cislab, type arp -a. Report on the findings. ARP reports all the other machines with which you have talked locally with the MAC address at layer 2.

You can also use the ping command. Type ping 172.16.64.1 to see pings being sent.

At the windows command line you can also type arp -a.

Start >> Run >> cmd.

Then at the command line type arp -a.

ping also works. In windows the command ipconfig is used for the ifconfig command.

Report on all findings.