Menus and Parameters

4.2.6.4.3Ethernet 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)

The default selection is Disable.

4.2.6.4.3.2 Ethernet Broadcast/Multicast Limiter Threshold

The Ethernet Broadcast/Multicast Limiter Threshold defines the maximum number of packets per second that will pass the limiter when it is enabled.

The range is from 0 to 204800 (packets/second).

The default is 50 packets.

4.2.6.4.3.3 Ethernet Broadcast/Multicast Limiter Send Trap Interval

The Ethernet Broadcast/Multicast Limiter Send Trap Interval defines the minimum time in minutes between two consecutive transmissions of the trap indicating the number of packets that were dropped by the limiter since the previous trap (or since the time that the limit has been exceeded).

Operation and Administration

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Alvarion SW VERSION 5.1 Ethernet Broadcast/Multicast Limiter Option, Ethernet Broadcast/Multicast Limiter Threshold