Extreme Networks Summit WM User Manual page 325

Term
Mobility manager (and
mobility agent)
Summit WM Controller
Summit WM series Spy
Wireless AP
WM Access Domain
Services (WM-AD)
Summit WM User Guide, Software Version 5.3
Explanation
The technique in Controller, Access Points, and WM software by which
multiple Summit WM Controllers on a network can discover each other
and exchange information about a client session. This enables a wireless
device user to roam seamlessly between different Wireless APs on
different Summit WM Controllers, to provide mobility to the wireless
device user.
One Summit WM Controller on the network must be designated as the
mobility manager. All other Summit WM Controllers are designated as
mobility agents. Relying on SLP, the mobility manager registers with the
Directory Agent and the mobility agents discover the location of the
mobility manager.
The Summit WM Controller is a rack-mountable network device designed
to be integrated into an existing wired Local Area Network (LAN). It
provides centralized control over all access points (both Wireless APs and
third-party access points) and manages the network assignment of
wireless device clients associating through access points.
The Summit WM series Spy is a mechanism that assists in the detection of
rogue access points. The feature has three components: (1) a radio
frequency (RF) scanning task that runs on the Wireless AP, (2) an
application called the Data Collector on the Summit WM Controller that
receives and manages the RF scan messages sent by the Wireless AP, (3)
an Analysis Engine on the Summit WM Controller that processes the scan
data.
The Wireless AP is a wireless LAN thin access point (IEEE 802.11)
provided with unique software that allows it to communicate only with a
Summit WM Controller. (A thin access point handles the radio frequency
(RF) communication but relies on a controller to handle WLAN elements
such as authentication.) The Wireless AP also provides local processing
such as encryption. The Wireless AP is a dual-band access point, with
802.11a/b/g/n radios.
The WM Access Domain Services (WM-AD) technique is Extreme
Networks's means of mapping wireless networks to the topology of an
existing wired network. When you set up WM Access Domain Services
(WM-AD) on the Summit WM Controller, you are defining subnets for
groups of wireless users. This WM-AD definition creates a virtual IP
subnet where the Summit WM Controller acts as a default gateway for
wireless devices. This technique enables policies and authentication to be
applied to the groups of wireless users on a WM-AD, as well as the
collecting of accounting information. When a WM-AD is set up on the
Summit WM Controller, one or more Wireless APs (by radio) are
associated with it. A range of IP addresses is set aside for the Summit WM
Controller's DHCP server to assign to wireless devices.
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