User's Manual

Menus and Parameters
Manual Revision 1.0
4-71
ToS Parameters
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.
NOTE
The prioritization mechanism is disabled when the traffic rate reaches the maximum
information rate supported by the SU.
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 Broadcast Filtering menu includes the following
parameters:
! Filter Options
! DHCP Broadcast Override Filter
! PPPoE Broadcast Override Filter
! ARP Broadcast Override Filter