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Transmitted ARP request packets echo back to other MUs.
The AP removes from its database the destination or interface information
that is not used for a specified time. The AP refreshes its database when it
transmits or receives data from these destinations and interfaces.
Filtering and Access Control
The AP provides facilities to limit the MUs that associate with it and the data
packets that can forward through it. Filters provide network security and
improve performance by eliminating broadcast/multicast packets from the
radio network.
The ACL (Access Control List) contains MAC addresses for MUs
allowed to associate with the AP . This provides security by preventing
unauthorized access.
The AP uses a disallowed address list of destinations. This feature prevents
the AP from communicating with specified destinations. This can include
network devices that do not require communication with the AP or its MUs.
Depending on the setting, the AP can keep a list of frame types that it
forwards or discards. The Type Filtering option prevents specific frames
(indicated by the 16-bit DIX Ethernet Type field) from being processed by
the AP . These include certain broadcast frames from devices that consume
bandwidth but are unnecessary to the wireless LAN. Filtering out
frames can also improve performance.
1.3.2
Auto Fallback to Wireless Mode
The AP supports an Auto Fallback to wireless mode when the hardware
Ethernet connection fails or becomes broken. The Auto Fallback function
operates only with an AP in WLAP mode and connected to the Ethernet
network. The AP resets itself and during initialization attempts to associate
with any other WLAP in the network.
AP-4100 Series Access Point Product Reference Guide
Introduction
15
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