Monitor and Enforcement
To adequately enforce the Network Bandwidth Guidelines, Computing Services continually monitors traffic to the commodity Internet link and records the usage for each machine registered on the network.
Each night, the average five day network bandwidth usage for a machine is calculated by adding the usage over the past five days, then dividing by five. If the average usage exceeds the limits set forth in the guidelines, the registered owner of the machine receives a first notification that their machine is using excessive bandwidth.
By using a five day average for first notification, Computing Services accommodates people who may have a one-time or rare "spike" in their use of network bandwidth.
After the first notification, there is a 72 hour grace period during which it is expected that the user will make necessary changes to reduce bandwidth usage. During this grace period, excessive bandwidth usage by the machine does not count against the user.
Once a machine has shown to use excessive bandwidth over a five-day period and the 72 hour grace period has expired, the daily bandwidth usage of the machine is checked nightly. The next time a machine uses network bandwidth exceeding the limits in a single day, a warning is sent to the user, warning them that they have again exceeded the guidelines.
There is another 72 hour grace period after the first warning, during which excessive bandwidth usage is allowed as the user is expected to be resolving the problem.
After the 72 hour grace period following the first warning, the next time a machine is found to have used network bandwidth exceeding the limits in a single day, another warning is sent to the user. They are told that this is the last warning they will receive and that their machine will be suspended from the network the next time their bandwidth usage exceeds the limits.
There is a final 72 hour grace period after the second warning, during which excessive bandwidth usage is allowed as the user is expected to be resolving the problem.
After the final 72 hour grace period, the next time a machine is found to have used network bandwidth exceeding the limits in a single day after having received the first notification and two warnings, the machine's registration is flagged as suspended. The suspension lasts for 45 days. Note: There are times when network connectivity is restored before the 45 day suspension period has been met, but doing so is an exception and depends on specific circumstances.
After the 45 day suspension period, the suspension flag is removed from the registration for the machine. The machine then falls into a first notification status level. At this time, the user can connect to the network normally.
After a Warning or Suspension
After a restoration from a suspension, the machine falls into a first notification status level. After 45 days, second warnings change to first warnings and first warnings change to first notifications.
Note: Once the owner of a machine has received the first notification after the bandwidth limit was exceeded over a five day average, that machine will always be noted as having received the first notification, no matter how much time passes. In other words, once a machine has exceeded the limit over a five day average, the machine will forever be monitored nightly for a single infraction of the limits and, at the very least, the "First Warning" noted above will be sent to the owner.
Before you ask that your computer be exempted from the bandwidth guidelines, make sure you know why it is consuming so much bandwidth and, if you exceed limits over a wireless connection, try connecting over a wired network connection. Most wireless machines can be connected to the wired network, which is faster and also has less restrictive guidelines. We recommend that you use the wired network for large data transfers.
If your use of network bandwidth is the result of a demonstrated need that supports the educational and research goals of the university and, in the case of wireless network connections, the transmissions must be done over a wireless connection, complete the Bandwidth Exemption Request Form to request an exemption from the bandwidth guidelines. Remember that while your request is being evaluated, you must adhere to the existing guidelines in order to avoid the possible loss of network connectivity. Also, requesting an exemption does not guarantee that you will receive one.
Last Updated: 4/23/09