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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.

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.

Three networks, two network names

Although there are three networks, there are only two SSIDs (wireless network names), StataCenter and CSAILPrivate. StataCenter provides two of the networks, both open and unencrypted. The first, which is the default, allows access for all users, with some restrictions on what unregistered users are able to do. Registered users use the second network, which has no restrictions, and these users may optionally request a static IP address assignment following the usual procedure. CSAILPrivate provides authenticated, encrypted access for active CSAIL members and affiliates only. Connecting to CSAILPrivate requires a CSAIL certificate and a client capable of WPA2 Enterprise authentication. Users on CSAILPrivate may also request a static IP address.

Address ranges

CSAILPrivate authenticated 128.30.8.0/22
StataCenter registered 128.30.4.0/22
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.
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Topic revision: 02 Mar 2012, GarrettWollman
 

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