Extreme Networks Summit WM Series Guía de usuario Pagina 86

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WM Access Domain Services (WM-AD)
Summit WM Series WLAN Switch and Altitude Access Point Software Version 4.1 User Guide
86
Each WM-AD represents a mobility group that, when configured, can be carried across multiple
Summit WM series switches. This does not apply for a bridged WM-AD.
Each WM-AD also offers unique Authentication, Authorization and Accounting (AAA) services.
Setting up a WM-AD checklist
WM-AD provides a versatile means of mapping wireless networks to the topology of an existing wired
network. When you set up a WM-AD on the Summit WM series switch, you are defining a subnet for a
group of wireless device users. The WM-AD definition creates a virtual IP subnet where the Summit
WM series switch acts as a default gateway to wireless devices.
In addition you can determine if the WM-AD is to apply for traffic bridging at the AP. This type of
WM-AD requires specification of RF parameters and authentication parameters (if AAA type), although
filtering specifications and topology specifications do not apply.
The Summit WM series switch WM200/2000 provides the option to define a WM-AD as locally bridged
to a VLAN at the controller. To support that configuration, you must define which VLAN the WM-AD
should bride to. With this configuration, it is possible that the controller is not involved in the IP
address assignment for user addresses. Instead, the IP addresses for users are assigned directly by the
DHCP infrastructure that services the VLAN.
NOTE
In a VLAN-bridged WM-AD, the default configuration dictates that the controller is not the DHCP server for that
segment. However, DHCP services can selectively be enabled, including DHCP Relay, allowing you to use the
controller to become the default DHCP server for the VLAN, if applicable.
Before defining a WM-AD, the following properties must be determined:
A user access plan for both individual users and user groups
The RADIUS attribute values that support the user access plan
The location and identity of the Altitude APs that will be used on the WM-AD
The routing mechanism to be used on the WM-AD
For tunneled configurations mostly, the network addresses that the WM-AD will use
A VLAN bridged WM-AD (at the controller) requires the specification of the IP address for the
controller's own interface point (Port) on that VLAN. In addition, if the you elect to have the
controller operate as the default DHCP server for the VLAN, the corresponding IP topology for that
subnet must also be specified.
The type of authentication for wireless device users on the WM-AD
The specific filters to be applied to the defined users and user groups to control network access
The quality of service (QoS) requirements
What privacy mechanisms should be employed between the Altitude APs and the wireless devices
Classification list for traffic priority. For example, whether the WM-AD is to be used for voice traffic
and if voice traffic is to be given priority.
Whether the WM-AD traffic is to be bridged directly to the network at the AP or tunneled to the
controller for forwarding. Bridging at the AP is useful in branch office deployments in which APs
must provide service even when the connection to the controller is unavailable.
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