Beginning June 1st 2011, personal routers (both wired and wireless) will not be allowed to connect to the Cornell network. This change was approved by TPAC (Technology Policy Advising Committee) on April 19th and President's Council on May 3rd.
Personal routers pose a couple different issues with Cornell's network. The first deals with security. One of the main features of a router is to use it to connect multiple devices using one network port and one IP address. Although this feature is great for connecting to a residential service such as Mediacom, it makes it impossible for our network managers to guarantee that only members of the Cornell community are connected to the campus network and its resources.
Second, almost all wireless routers use the same radio frequency. When students add wireless routers, they will conflict with Cornell's access points and signal degradation will occur. We have seen several instances where students cannot connect to the CornellWireless network because a student owned router is running on the same channel. As long as wireless routers are allowed, it will be impossible for our IT department to properly troubleshoot the CornellWireless network.
If students have a need to connect multiple devices to the port, a network switch or hub may still be used.