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WM Access Domain Services
WM Access Domain Services (WM-AD) provide a versatile method of mapping wireless networks to
the topology of an existing wired network.
When you set up WM-AD on the Summit WM Controller you are defining subnets for groups of
wireless users. The WM-AD definition provides the binding between WM-AD IP topology configuration
(Routing, DHCP policy) and the RF configuration parameters that advertise and control network access
(SSID, Privacy policy: WEP and WPA). 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 on user
sessions that can be used for billing.
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
The Summit WM Controller can support the following:
WM200/2000 - Up to 64 WM-ADs
WM20 - Up to 8 WM-ADs
WM1000 - Up to 50 WM-ADs
WM100 - Up to 32 WM-ADs
The Wireless AP radios can be assigned to each of the configured WM-ADs in a system. Each
TM
Altitude
AP can be the subject of 16 WM-AD assignments - 8 WM-AD assignments per radio - which
corresponds to the number of SSIDs it can support. Once a radio has all 8 slots assigned, it is no longer
eligible for further assignment.
Static routing and routing protocols
Routing can be used on the Summit WM Controller to support the WM-AD definitions. Through the
user interface you can configure routing on the Summit WM Controller to use one of the following
routing techniques:
Static routes - Use static routes to set the default route of a Summit WM Controller so that legitimate
wireless device traffic can be forwarded to the default gateway.
Open Shortest Path First (OSPF, version 2) (RFC2328) - Use OSPF to allow the Summit WM
Controller to participate in dynamic route selection. OSPF is a protocol designed for medium and
large IP networks with the ability to segment routes into different areas by routing information
summarization and propagation. Static Route definition and OSPF dynamic learning can be
combined, but a static route definition will take precedence over dynamic rules.
Next-hop routing - Use next-hop routing to specify a unique gateway to which traffic on a WM-AD
is forwarded. Defining a next-hop for a WM-AD forces all the traffic in the WM-AD to be forwarded
to the indicated network device, bypassing any routing definitions of the controller's route table.
Packet filtering policy
Policy refers to the rules that allow different groups of users access to the network. The Controller,
Access Points, and WM software system can link authorized users to user groups. These user groups
then can be confined to predefined portions of the network.
Summit WM User Guide, Software Version 5.3
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