Communications Service Network
CSN

Network and Connectivity FAQs

There is a wealth of information about computing at Virginia Tech located at http://www.computing.vt.edu. You will find help and tutorials, information about the computing services offered at VT, information about web access and e-mail, and much more. If you don't find what you are looking for here, you may find it there.You may contact 4HELP at 231-HELP (4357) from off-campus, 4-HELP (4-4357) from on-campus, or you may visit their website.


General Network Questions

Network Adapters

Servers and Listservs

E-mail


General Network Questions

What is the speed of Internet connection from Virginia Tech's Blacksburg campus?
Virginia Tech's primary Internet connection is via Network Virginia's shared T3 from 'SprintLink'. The link between Virginia Tech and the T3 over 'NetworkVirginia.NET' is an OC-12 622Mbps ATM. Virginia Tech also maintains a backup T1 from 'MCI' in case of primary link failure. You can find out more about Network Virginia at http://www.networkvirginia.net.

How can I get Virginia Tech Ethernet service?
If you are an on-campus student, Ethernet is already installed in your room. Each residential student has one Ethernet connection. Therefore, if there are two people in your room, then there will be two Ethernet portals as well.

Off-campus, several apartment complexes offer access to Ethernet service.

Why is the network so slow?
The network may be slow for a number of reasons. It is possible that the number of people using the network at any given moment may cause a lag in the speed of the network. Also, CNS reserves the right to limit users who frequently use more than their fair share of network capacity. As such, if you have been using a large amount of bandwidth, you may have been limited in some way by CNS. Finally, there may, indeed, be a problem with a piece of the network or with your individual connection. We recommend contacting the Virginia Tech Operations Center (VTOC) to determine what your actual problem is. You may reach the VTOC at 231-6780 24 hours a day.

For how long after I graduate will I be able to use my VT PID and filebox?
Access to your PID will be terminated if you are no longer an employee, a retiree, or a sponsored person, and have not been a student.

Regarding your filebox, please refer to the question, "Can I keep my filebox if I leave Virginia Tech?", and its answer, near the bottom of the Virginia Tech Filebox FAQ, on the web, at answers.vt.edu. Not surprisingly, this mirrors the PID/e-mail policy (above).

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Network Adapters

What is the MAC address?
The MAC address is also called the hardware address or physical address of a machine; it is a unique 48-bit address that is encoded directly on the Ethernet interface of the computer. It serves to uniquely identify the physical network interface of the computer, regardless of the IP address it may have at the moment. The MAC address is made up of 12 characters and appears in the format of xx-xx-xx-xx-xx-xx, such as 00-00-00-15-89-EE.

How do I identify my computer's MAC address?
Depending on the operating system (OS) you are running, you should do the following:

For Windows 95/98/ME:
  • Click Start and select Run.
  • Type winipcfg in the Open: field and click "OK."
  • The MAC address is displayed in the Adapter Address box
For Windows NT/2000/XP:
  • Go to the Start menu and select Run.
  • In the text box, enter: cmd and click "OK."
  • At the prompt, enter: ipconfig /all.
  • The 12-digit number listed as Physical Address is the MAC address.

Example
Windows 2000 IP Configuration

Ethernet adapter Local Area Connection 3:

Connection-specific DNS Suffix . .:
Description . . . . . . . . . . . : IBM High Rate Wireless LAN PC Card
Physical Address. . . . . . . . . : 00-02-2D-0E-43-D1

For OS X
  • Click the Apple
  • Go to system preferences
  • Select Network
  • Select the TCP/IP tab

The MAC address is located at the bottom under Ethernet address and looks like 00:00:00:15:89:EE

For OS 9
  • Click the Apple
  • Go to control panels
  • Select TCP/IP
  • In the window select File > Get Info.

A second window will pop up and the MAC address is listed as hardware number 00:00:00:15:89:EE

What if I have more than one network adapter?
Some computers may have more than one network adapter available. For instance, a computer may have both an Ethernet adapter and a PPP adapter ( for dial-up connections) or a Wireless LAN adapter.

In Windows NT/2000/XP, "wired" connections, or cards that require a physical cable to connect, are usually labeled "Ethernet adapter Local Area Connection #." Wireless connections should appear as "Ethernet adapter Wireless Network Connection" or something similar.

Example
Windows 2000 IP Configuration

Host Name . . . . . . . . . . . .:
Primary DNS Suffix . . . . . . . : cns.w2k.vt.edu
Node Type . . . . . . . . . . . .: Hybrid
IP Routing Enabled. . . . . . . .: No
WINS Proxy Enabled. . . . . . . .: No
DNS Suffix Search List. . . . . .: w2k.vt.edu
. . . . . . . . . . . . . . . . . .cns.vt.edu
. . . . . . . . . . . . . . . . . .cc.vt.edu

Ethernet adapter Local Area Connection 3:

Connection-specific DNS Suffix . .:
Description . . . . . . . . . . . : IBM High Rate Wireless LAN PC Card
Physical Address. . . . . . . . . : 00-02-2D-0E-43-D1
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 198.82.168.137
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 198.82.168.1
DHCP Server . . . . . . . . . . . : 198.82.247.67
DNS Servers . . . . . . . . . . . : 198.82.247.34
. . . . . . . . . . . . . . . . . : 198.82.247.98
Primary WINS Server . . . . . . . : 198.82.162.243
Secondary WINS Server . . . . . . : 198.82.162.242
Lease Obtained. . . . . . . . . . : Tuesday, September 02, 2003 11:14:54 AM
Lease Expires . . . . . . . . . . : Tuesday, September 02, 2003 12:14:54 PM

Ethernet adapter Local Area Connection 2:

Media State . . . . . . . . . . . : Cable Disconnected
Description . . . . . . . . . . . : Xircom Cardbus Ethernet II 10/100 #2
Physical Address. . . . . . . . . : 00-10-A4-19-1C-B6

Windows 95/98/Me displays drop-down boxes with each adapter listed as a separate entry. Wired connections will appear as Ethernet, Dial-up may appear as PPP, and Wireless connections should appear as Brand (ex. 3Com) Wireless LAN PC Card.

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Servers and Listservs

How do I set up a listserv for my organization?
Contact 4Help for assistance setting up a listserv. Their URL is: http://www.4help.vt.edu.

I am interested in running a website off of my personal computer in my room. How woud I go about getting my IP address registered and ensuring I am within the limits of the Acceptable Use Policy?
A dynamically assigned IP address works for most students' computer needs. We do not provide static addresses on the residence hall network. Be sure to read the University's policy and guidelines on acceptable use at: http://www.vt.edu/about/acceptable-use.html.

Can I set up a server to run off of the Virginia Tech network?
Yes. If you plan to run multiple machines via a single network portal, you must complete an application for Private Ethernet-Additional Connections at Student Network Services. Their office is located at 120 Student Services Building and is open 8:00 a.m. to noon or 1:00 p.m. to 5:00 p.m., Monday through Friday. There are limits to the amount of bandwidth available to given connection and, to ensure minimal exposure to computer viruses, it is critical that you keep up to date with the latest software patches. Be sure that your server operation complies with the university's acceptable use standard (see: http://www.vt.edu/about/acceptable-use.html) and, that you do not contravene copyright laws.

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E-mail

Is there any way to configure my e-mail to filter out SPAM from particular Domains at the server level?

The mail servers and related services are administered by a unit of the University Computing Center. The 4HELP consultants are the "front desk" for that group. You may contact them at 231-HELP or 4-HELP.

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Contact
Communications Network Services
1770 Forecast Drive (0506)
Blacksburg, Virginia 24060
(540) 231-6460
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