Specifications

Chapter 4 - Operation and Administration Menus and Parameters

BreezeACCESS 4900 159 System Manual

4.2.6.4.2.4 ARP Broadcast Override Filter

The ARP Broadcast Override Filter option enables or disables the broadcasting of

ARP messages. Even if according to the selected option in the Filter Options

parameter, broadcast messages should be filtered, ARP broadcasts are

transmitted if this parameter is set to Enable. Select from the following options:

 Disable - ARP messages are filtered or transmitted according to the general

filtering criteria in the Filter Options parameter.

 Enable - ARP messages are transmitted regardless of the selected value of the

Filter Options parameter.

The default selection is Enable.

4.2.6.4.3 Ethernet Broadcast/Multicast Limiter

The Ethernet Broadcast/Multicast Limiter parameters, available in both AU and

SU, enable to limit the number of broadcast and/or multicast packets that can be

transmitted per second, in order to prevent the potential flooding of the wireless

medium by certain ARP attacks.

In SUs, the limiter is placed after the Ethernet Broadcast Filters. For this reason,

the limiter will receive only the packets that pass through these filters. If the

Ethernet filters of the SU are disabled, the limiter will be applied to all relevant

packets received.

When the Ethernet Broadcast/Multicast Limiter is enabled and the specified limit

is reached, the unit will send a trap. The trap will be sent periodically till the

number of broadcast/multicast packets will be less than the maximum. The trap

will inform the user how many packets were discarded in the last period.

The Ethernet Broadcast/Multicast Limiter menu allows viewing and setting the

following parameters:

4.2.6.4.3.1 Ethernet Broadcast/Multicast Limiter Option

The Ethernet Broadcast/Multicast Limiter Option defines the limiter's

functionality. The available options are:

 Disable: No limiter

 Limit only Broadcast Packets

 Limit Multicast Packets that are not Broadcasts

 Limit All Multicast Packets (including broadcast)