User's Manual
Chapter 4 - Operation and Administration
BreezeNET B System Manual
4-56
Ethernet Broadcast Filtering (RB only)
The Ethernet Broadcast Filtering menu enables defining the layer 2
(Ethernet) broadcast and multicast filtering capabilities for the selected
RB. Filtering the Ethernet broadcasts enhances the security of the
system and saves bandwidth on the wireless media by blocking
protocols that are typically used in the customer's LAN but are not
relevant for other customers, such as NetBios, which is used by the
Microsoft Network Neighborhood. Enabling this feature blocks Ethernet
broadcasts and multicasts by setting the I/G bit at the destination
address to 1. This feature should not be enabled when there is a router
behind the RB.
The Ethernet Broadcasting Filtering menu enables configuring the
following parameters:
Filter Options
The Filter Options enables defining the Ethernet Broadcast filtering
functionality of the unit. Select from the following options:
Disable, which means no Ethernet Broadcast Filtering.
From Ethernet Only, which filters broadcast messages received
from the Ethernet port.
From Wireless Link Only, which filters broadcast messages
received from the wireless link port.
Both From Ethernet & Wireless Link, which filters broadcast
messages received from both the Ethernet and wireless link ports.
The default selection is Disable.
DHCP Broadcast Override Filter
The DHCP Broadcast Override Filter option enables or disables the
broadcasting of DHCP messages. Even if according to the selected
option in the Filter Options parameter, broadcast messages should be
filtered, DHCP broadcasts are transmitted if this parameter is set to
Enable. Select from the following options:
Disable, which means that DHCP Broadcast messages are filtered or
transmitted according to the general filtering criteria in the Filter
Options parameter.
Enable, which means that DHCP Broadcast messages are
transmitted regardless of the selected value of the Filter Options
parameter.
The default selection is Disable.