Inside Tufts University Information Technology

Network Engineering

Trouble shooting TCP/IP connections

Physical Problems...Finding TCP/IP Info...Ping and Traceroute

Finding current TCP/IP information

The next step is to check the TCP/IP configuration of the machine. To check that the machine is registered with UIT, contact your FSP or the UIT HelpDesk. They may ask for the Media Access Control (MAC) address . MAC address is the official term now, but it may also be referred to as the adapter address, hardware address or ethernet number. It is a number, which is unique to every network interface card (NIC), and when registered with UIT, it is assigned an IP address. You can look on the physical card where it is most likely printed or issue one of the following software commands.

Locating the MAC address, IP address and other network information
Windows 2000, Windows XP ipconfig /all
Macintosh Classic
Linux, Macintosh OS X, and Unix Operating Systems

If your machine is not obtaining an IP address beginning with 130.64.#.#, but you do have a link light, chances are that your machine is either misconfigured, or has not been registered with TCCS. Please compare your configuration to Network Engineering's instructions. If you make any corrections, reboot to activate the changes.

If you have a link light, can get an IP address, but still can not make your connection, then proceed on to the third section.