Alvarion BreezeACCESS VL 5.4 System Manual page 109

Operation and Administration
ToS Priority
The ToS Priority menu enables configuring voice priority parameters to
support end-to-end IPv4 Type of Service (ToS) layer 3 prioritization
according to RFC 791.
The ToS Priority menu includes the following parameter:
ToS Precedence Threshold
The ToS Precedence Threshold parameter enables defining ToS-based
prioritization in accordance with the precedence bits of the ToS field in the
IP header. An IP packet received from the Ethernet port is routed to the
Mid queue if any one of the following conditions is met:
♦ The precedence in the ToS field is higher than the value of the ToS
Precedence Threshold parameter. This is applicable to both tagged and
untagged frames.
♦
The VLAN Priority field in a tagged frame (Hybrid or Trunk Link) is
higher than the value of the VLAN Priority Threshold parameter.
All other packets received from the Ethernet port are routed to the Low
queue.
Valid values are 0 to 7.
The default value is 3.
Ethernet Broadcast Filtering (SU only)
The Ethernet Broadcast Filtering menu enables defining the layer 2
(Ethernet) broadcast and multicast filtering capabilities for the selected
SU. 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 SU.
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.
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