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Finding Your Computer's MAC Address
MAC is short for Media Access Control. The MAC address is the hardware address that uniquely identifies each network device on the Cal Poly network. The MAC address is also sometimes called the ethernet address.
More details are available below about what a MAC Address really is. Please note that a MAC Address is not the same thing as an IP Address!
Windows XP, 2000, and NT Windows ME, 98, and 95 MacOS X MacOS 9.2 running TCP/IP (Open Transport) Linux Solaris SunOS
Windows XP, 2000, and NT
Click on the Start Menu then select Run.
Type cmd then click OK.
In the Command Prompt box, type ipconfig /all then hit Enter.
Note the Physical Address, this is also the MAC address.
Windows ME, 98, and 95
Click on the Start Menu then select Run.
Type winipcfg then click OK.
In the drop down menu, select the item corresponding to your network card (ignore the PPP Adapter).
Note the Adapter address, this is the MAC address.
MacOS X
In MacOS 10.2 and newer, there are two methods of finding your computer's MAC address. In versions earlier than 10.2, only the first method is available.
Method 1:
Go to the Apple Menu Select System Preferences Select Network Be sure that the pulldown list is at Show: Built-In Ethernet Select the TCP/IP tab The MAC address will be shown as "Ethernet Address"
Method 2 (works with 10.2 and newer):
Go to the Apple Menu Select About This Mac Select More Info Select the System Profile tab Under Network Overview: Built-In, the MAC address will be shown as "Ethernet Address"
MacOS 9.2 running TCP/IP (Open Transport)
Select the Open Transport Control Panel from the Control Panels folder in the Apple or open the file directly with this path:
[Local Macintosh Hard Disk::System Folder::Control Panels::TCP/IP]
The control panel will look like this:
one device connected to the network, it will be listed as well, with a different MAC address.
eth0 Link encap:Ethernet HWaddr 00:90:27:2A:C4:
inet addr:131.215.105.34 Bcast:131.215.105.255 Mask:255.255.255. UP BROADCAST RUNNING MULTICAST MTU:1500 Metric: RX packets:96182694 errors:0 dropped:0 overruns:0 frame: TX packets:137175658 errors:0 dropped:0 overruns:0 carrier: collisions:0 txqueuelen: Interrupt:14 Base address:0x
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0. UP LOOPBACK RUNNING MTU:3924 Metric: RX packets:5738011 errors:0 dropped:0 overruns:0 frame: TX packets:5738011 errors:0 dropped:0 overruns:0 carrier: collisions:0 txqueuelen:
Solaris
At the prompt, type arp and the machine name as shown:
{shada:2194} arp shada shada (131.215.48.53) at 8:0:20:b9:59:e6 permanent published
You can generalize this to
arp uname -n
Note that backticks surround the uname -n command.
SunOS
At the prompt, type ifconfig -a as shown. Note that the MAC address is also called the ethernet address abbrievated to ether by this command.
accord# ifconfig -a le0: flags=63 <UP,BROADCAST,NOTRAILERS,RUNNING>
inet 131.215.48.152 netmask ffffff00 broadcast 131.215.48. ether 8:0:20:11:68:6a
le1: flags=
ether 8:0:20:11:68:6a
le2: flags=63 <UP,BROADCAST,NOTRAILERS,RUNNING>
inet 131.215.50.208 netmask ffffff00 broadcast 131.215.50. ether 8:0:20:11:68:6a
lo0: flags=49 <UP,LOOPBACK,RUNNING> inet 127.0.0.1 netmask ff
