CSAIL Wireless

CSAIL operates three parallel wireless networks. All are implemented by the same physical infrastructure, which currently (March 2012) consists of 73 Meraki MR14 access points. Each access point has two radios, and is configured for 802.11a/n on the 5-GHz band and 802.11g/n on the 2.4-GHz band. The improved channel separation of the 5-GHz band allows us to use 40-MHz channels for .11n support, providing a maximum data rate of about 300 Mbit/s. In the spring of 2014, we replaced access points on the second and fourth floors with Meraki MR34 units, which support IEEE 802.11ac; we will be rolling out this new technology to other floors in future years.

The access points are configured to do autonomous channel assignment. You can determine which access point you are using, and some basic parameters of the radio connection, by visiting my.meraki.net in your browser. Current network status information is available.

Two wireless networks

There are two SSIDs (wireless network names), StataCenter and CSAILPrivate. StataCenter is an open and unencrypted wireless network intended for non-CSAIL users (including guests), with some restrictions on what users are able to do. CSAILPrivate provides authenticated, encrypted access for active CSAIL members and affiliates only. Connecting to CSAILPrivate requires a CSAIL account and a client capable of WPA2 Enterprise authentication. Users on CSAILPrivate may request a static IP address.

Address ranges

CSAILPrivate authenticated 128.30.8.0/22
StataCenter guest 128.31.32.0/22

Restrictions

  • The original 802.11 and 802.11b data rates (1, 2, and 5.5 Mbit/s) are not supported.
  • Dual-band clients which connect on a 2.4 GHz chanel will be steered to the 5-GHz band when possible.
Topic revision: 09 Jun 2014, GarrettWollman
 

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