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Information Technologies Insfrastructure

DHCP Configuration

Dynamic Host Configuration Protocol (DHCP) provides a method for the automatic administration and configuration of the IP parameters required for your computer to access the network.

Specifically, DHCP attempts to grant a "lease" of an IP address to your host, as well as provide your host with the IP address of your default network router, domain name servers, subnet mask and other required IP configuration data.

You can simplify your host's network configuration by using DHCP and access the network without needing to contact the hostmaster for an IP address.

When using DHCP, you do not need to know any technical information about the network to which you are connecting. The DHCP protocol will negotiate with your computer to provide the correct IP address, default gateway, subnet mask, broadcast address and domain name servers.

DHCP leases your host a dynamically assigned IP name and address for a specific length of time. As long as you are connected, your lease will be renewed automatically. If you disconnect, your address is returned to a pool of available addresses and others may be leased that address. In general, when booting, Windows95/98 hosts will always request the last address it had. Since we have a large address space, it is likely that you will receive the same address again and again. Since DHCP may not lease you the same address for every network session, you will not be able to run mail or web servers on your system. Any server that requires you to have a static (permanent) IP address will not function properly. If you have an application where you require a static IP address, you may contact hostmaster@rpi.edu to request one.

Configuring Your Machine for DHCP For a Windows 95/98 system:

  1. From the desktop: Start -> Settings -> Control Panels -> Network -> TCP/IP (for your ethernet card),select "Obtain IP address automatically"
  2. Under the WINS Configuration panel, click "Use DHCP for WINS resolution"
  3. You do not need to configure anything on the DNS or Gateway control panels.

For a Windows/NT system:

  1. From the desktop: Start -> Settings -> Control Panels -> Network -> Protocols -> TCP/IP, select "Obtain an IP address from a DHCP server"
  2. Under the WINS address configuration panel, enter 128.113.172.123 for the Primary WINS server.
  3. You do not need to configure anything on the DNS or Gateway control panels.

For a Macintosh system:

  1. Macintosh systems use Open Transport to configure the TCP/IP parameters of the host. You should be using Open Transport version 2.1 or greater.
  2. From the desktop: Apple Menu -> Control Panel -> TCP/IP set the choice windows to "Connect Via Ethernet" and "Configure using DHCP Server
Using DHCP on networks other than ResNET:DHCP is available from any switched ethernet or DormNet jack. DHCP service is also offered on other campus networks as well, listed below:
  • Amos Eaton - subnet 2
  • Ricketts - Subnet 31
  • DCC - subnet 54
  • CII - subnet 85

 

 

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