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HWC_Intro.fm
A31003-W1010-A100-1-7619, July 2005
HiPath Wireless Controller, Access Points and Convergence Software V3.0: User Guide
21
The Controller, Access Points and Convergence Software solution
Controller, Access Points and Convergence Software and your network
Static routes: Use static routes to set the default route of a HiPath Wireless 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 specify the next best
hop (route) of a HiPath Wireless Controller. Open Shortest Path First (OSPF) is a protocol
designed for medium and large IP networks, with the ability to segment routers into
different routing areas for routing information summarization and propagation.
Next Hop Routing: Use next hop routing as part of a VNS definition to specify a unique
default gateway to which traffic on a unique VNS is forwarded
2.2.6 Policy: packet filtering
Policy refers to the rules that allow different network access to different groups of users. The
Controller, Access Points and Convergence Software system can link authorized users to user
groups. These user groups then can be confined to predefined portions of the network.
In the Controller, Access Points and Convergence Software system, policy is carried out by
means of packet filtering, within a VNS.
In the HiPath Wireless Controller user interface, you set up a filtering policy by defining a set of
hierarchical rules that allow (or deny) traffic to specific IP addresses, IP address ranges, or
services (ports). The sequence and hierarchy of these filtering rules must be carefully
designed, based on your enterprise’s user access plan.
The authentication technique selected determines how filtering is carried out:
If authentication is by SSID and Captive Portal, a non-authenticated filter will allow all users
to get as far as the Captive Portal web page, where login occurs. When authentication is
returned, then filters are applied, based on user ID and permissions.
If authentication is by AAA (802.1x), users will already have logged in and have been
authenticated before being assigned an IP address. At this point, filters are applied, based
on user ID and permissions.
2.2.7 Mobility and roaming
The 802.11 standard allows a wireless device to preserve its IP connection when it roams from
one access point to another on the same subnet. However, if a user roams to an access point
on a different subnet, the user is disconnected.
Controller, Access Points and Convergence Software has functionality that supports mobility
on any subnet in the network. Wireless device users can roam between Wireless APs on any
subnet without having to renew the IP connection.
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