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Overview of the Summit WM Controller, Access Points and Software Solution
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
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A range of IP addresses is set aside for the Summit WM Controller's DHCP server to assign to
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wireless devices
If routing protocol is enabled, the Summit WM Controller advertises the WM-AD as a routable network
segment to the wired network and routes traffic between the wireless devices and the wired network.
The Summit WM Controller WM20 also supports VLAN-bridged assignment for WM-ADs. This allows
the controller to directly bridge the set of wireless devices associated with a WM-AD directly to a
specified core VLAN. The following lists how many WM-ADs the Summit WM20 Controller can
support:
WM20 – Up to 8 WM-ADs
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The Wireless AP radios can be assigned to each of the configured WM-ADs in a system. Each AP can be
the subject of 8 WM-AD assignments (corresponding 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
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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
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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
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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.
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Summit WM20 User Guide, Software Release 4.2
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