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BreezeMAX Modular Base Station System Manual 207
4.11.2 Introduction to Filtering Features
The Filtering features allow a network operator to control the traffic in the system
by forwarding or discarding packets according to a set of rules based on multiple
allow/deny criteria. This provides both improved network security and better
utilization of the wireless medium.
The filtering is done at the base station, controlling the traffic between the
network and the wireless link. The filtering features enable:
 Filtering packets arriving from the network interface (From Network Filtering),
using a set of either Layer 2 or Layer 3/Layer 4 Filtering Rules.
 Filtering packets arriving from the wireless link (From Wireless Filtering),
using a set of either Layer 2 or Layer 3/Layer 4 Filtering Rules.
 Discarding packets to/from specific MAC addresses (MAC Address Deny List).
This is applicable to MAC Addresses behind SUs.
The following figure describes the filtering functionality.
The filtering definition process includes the following steps:
1 Defining list(s) of Filtering Rules. Each Filtering Rule defines a combination of
values for certain packet fields. Filtering Rules can be of 2 types: Layer 2
NOTE
The Filtering features are not applicable for units operating in IP CS Switching Mode.
Figure 4-2: Filtering Functionality