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Windows 98 
Windows Me 
Go to the Start menu, select Run, type in 
winipcfg
, and hit Enter. A 
popup window will be displayed. Select the appropriate adapter from the 
pull-down menu and you will see the Adapter Address. This is the MAC 
address of the device. 
Windows 2000 
Windows XP 
Go to your Start menu, select Programs, select Accessories, and select 
Command Prompt. At the command prompt type 
ipconfig /all
and hit 
Enter. The physical address displayed for the adapter connecting to the 
router is the MAC address. 
Mac OS X 
Go to the Apple Menu, select System Preferences, select Network, and 
select the Ethernet Adapter connecting to the router. Select the Ethernet 
button and the Ethernet ID will be listed. This is the same as the MAC 
address. 
DHCP Reservations List 
This shows clients that you have specified to have reserved DHCP addresses. An entry can be 
changed by clicking the Edit icon, or deleted by clicking the Delete icon. When you click the 
Edit icon, the item is highlighted, and the "Edit DHCP Reservation" section is activated for 
editing. 
Number of Dynamic DHCP Clients 
In this section you can see what LAN devices are currently leasing IP addresses. 
Revoke 
The 
Revoke
option is available for the situation in which the lease table becomes full or 
nearly full, you need to recover space in the table for new entries, and you know that 
some of the currently allocated leases are no longer needed. Clicking 
Revoke
cancels the 
lease for a specific LAN device and frees an entry in the lease table. Do this only if the 
device no longer needs the leased IP address, because, for example, it has been 
removed from the network. 
Reserve 
The 
Reserve
option converts this dynamic IP allocation into a DHCP Reservation and 
adds the corresponding entry to the DHCP Reservations List.