DHCP
DHCP FAQ
What is DHCP?
How do I setup my laptop for DHCP?
How is DHCP useful?
What if I want a specific IP number when I am in my office?
Does the WSU dhcp server hand out IPs in the Greek Row network?
How do I become registered in the DHCP server at WSU?
If I register in the WSU Pullman DHCP server, will my laptop work at the Branch campus locations?
Is there a fee for registering?
How is BOOTP different from DHCP?
Which do I use?
Why is an ethernet board address required for DHCP/B OOTP?
Do I already need an IP number?
How do I determine my ethernet/wireless board address?
Where can I find additional dhcp setup instructions?
What is DHCP?
Dynamic Host Configuration Protocol (DHCP) is a protocol that a PC, Macintosh, Linux host, etc... can use to automatically obtain an IP number over the network from a DHCP server. It allows users to travel to different subnets without having to manually type in a new IP number, gateway, etc... for each subnet.
How is DHCP useful?
DHCP is useful for laptop users who carry their laptops to different subnets on the WSU campus and attach to the network. If the user is registered in the DHCP server, the laptop will receive an appropriate IP number for that subnet.
What if I want a specific IP number when I am in my office?
A "static" IP address can be registered in the DHCP server for a specific subnet. This way, your laptop will always receive the same IP number when booted in your office.
Does the WSU dhcp server hand out IPs in the Greek Row network?
No. You need to be on campus to use the dhcp server (i.e. dhcp will work properly in libraries, offices, resident halls, and yakama apartments). The WSU dhcp server will not hand out an IP to the Greek houses.
How do I become registered in the DHCP server at WSU?
Yakama and Resident Hall occupants can register via:
http://www.resnet.wsu.edu/certify/
(NOTE: Yakama and Resident Hall users should be able to boot their machines from their own rooms and connect to the above SCS page if they have properly configured their computer to use a dhcp client. However, they will not be able to use other services until they have registered on the SCS page - i.e. mail, surf the net...)
All other users (staff, faculty, off-campus users) can register via:
http://www.wsu.edu/dhcp/
If I register in the WSU Pullman DHCP server, will my laptop work at the Branch campus locations?
No. When you specify that you want to register for DHCP at the Pullman campus, you can only use DHCP on the Pullman campus. You can now specify (http://www.wsu.edu/dhcp) that you want to request DHCP at the College of Nursing - Spokane, Spokane Riverpoint, Tri-Cities and Vancouver. .
Is there a fee for registering?
No.
How is BOOTP different from DHCP?
The DHCP server can be setup to hand out or "lease" an IP number to a client for a specific amount of time. Once the client shuts off their computer and the lease period expires, the DHCP server can lease that IP to another client. An exception to this rule is when a "static" IP number is assigned to a specific client. BOOTP protocol does not use this process of leasing out an IP. Instead, a client setup to receive an IP number via BOOTP will be the only client that can ever receive that IP number. (DHCP entries can be configured to act in this manner when "static" IP numbers are assigned.) DHCP is favored over BOOTP for the above reason.
Which do I use?
The choice between DHCP and BOOTP is partially dependent on the software you are using.
The following can be configured to use DHCP:
NT/Win2000 and MS TCP/IP
Win95/98 and MS TCP/IP
Windows for Workgroups and MS TCP/IP
Macintosh with Open Transport
The following can only be configured to use BOOTP:
Macintosh with Open Transport
Windows 3.x and Trumpet Winsock
Macintosh and MacTCP
You are encouraged to upgrade your software to use DHCP. PC users would need to upgrade to Windows for Workgroups, Win95/98 or NT. Macintosh users would need to upgrade to a MAC OS that supports Open Transport. Consult your local computer support person for details.
Why is an ethernet board address required for DHCP/BOOTP?
An ethernet board address is required before two machines on a network can communicate. A DHCP or BOOTP client will broadcast a DHCP/BOOTP request on bootup. A DHCP/BOOTP server is able to respond to the client once it knows the clients ethernet board address.
Do I already need an IP number?
When you register for DHCP, you do not need to have an IP number previously assigned to your laptop. However, many users already have an IP number assigned to their laptop and want to make sure this "static" IP number is always handed out to their laptop when they boot up in their office area or "home subnet".
How do I determine my ethernet/wireless board address? (Also check here for more instructions)
You can use the following methods to determine your ethernet board address. You must make sure your ethernet/wireless board is "enabled" or turned on first though...
Windows 3.x and Trumpet Winsock
Run the tcpman.exe Trumpet Winsock application. The ethernet board address is displayed in the windows that appears.
Windows for Workgroups and MS TCP/IP
Open a DOS window and type "ipconfig.exe" and press return. The ethernet board address will be displayed.
Win95/98
Click on start, run and type "winipcfg.exe" and press return. The address is displayed in the adapter address window. Sometimes a dial-up adapter will be selected and the dial-up adapter address will be displayed instead of the ethernet board address adapter. Do NOT use the dial-up adapter address (the dial-up adapter address begins with the number "4"). Instead, you should be able to click on a down arrow and select an entry for the installed ethernet adapter. Once the ethernet board adapter has been selected, the proper ethernet board adapter address will also be displayed.
NT
Run winmsd.exe and click on the "network" button. Your ethernet board address will appear in the "address" column in the "transport" section.
Win2000
Run winmsd.exe and select Components, Network, Adapter.
Macintosh with MacTCP
Open the control panel, MacTCP window. Hold down the option key on your keyboard and click on the Ethertalk icon in the window. The ethernet board address will be displayed.
Macintosh with Open Transport
Open the AppleTalk control panel. Under the Edit menu, select the choice that gives you Admin privledges. In the AppleTalk window select "ethernet" from the "Connect via" section, then click on the "Info" button on the lower section of the window. A window will open that displays the ethernet board address.
How do I setup my laptop for DHCP?
ALL users should remove manually typed DNS and gateway definitions from their tcp/ip client settings.
Windows 3.x and Trumpet Winsock
Run tcpman.exe and select "setup". Type "bootp" in the IP number box. Save, exit and reboot.(NOTE: you may want to consider upgrading to the software below that supports DHCP instead of BOOTP.)
Windows for Workgroups and MS TCP/IP
Click the "enable automatic dhcp configuration" box from the network setup, drivers, tcp/ip window. Close, exit and reboot.
Win95/98
Click the "obtain an IP address automatically" box from the start, settings, control panel, network, TCP/IP window. Also select "use dhcp for WINS resolution" from the WINS Configuration tab. Close, exit and reboot.
NT
Click the "enable automatic dhcp configuration" box in either the Windows NT TCP/IP Installation Options dialog window or the TCP/IP Configuration dialog window.
Macintosh with Open Transport
Open the TCP/IP control panel and select the dhcp option..
Where can I find additional dhcp setup instructions?
http://www.scs.wsu.edu/resnet/?content=resinstruct


Questions?
peckham@wsu.edu