User Manual

Table Of Contents
Chapter 4 - Operation and Administration
BreezeACCESS VL System Manual
192
4.2.6.6.3.2 ToS Prioritization
The ToS Prioritization parameters enable defining prioritization in accordance
with either the 3 IP Precedence bits in the IP header in accordance with RFC 791,
or the 6 DSCP (Differentiated Services Code Point) bits in accordance with RFC
2474. The ToS Prioritization menu includes the following parameters:
4.2.6.6.3.2.1 ToS Prioritization Option
The ToS Prioritization Option defines whether ToS-based prioritization is enabled
or disabled. The following options are available:
Disable
Enable IP Precedence (RFC791) Prioritization
Enable DSCP (RFC2474) Prioritization
The default is Disable.
4.2.6.6.3.2.2 IP Precedence Threshold
The IP Precedence Threshold parameter is applicable when the ToS Prioritization
Option is set to Enable IP Precedence (RFC791) Prioritization. If the value of the 3
IP Precedence bits in the IP header is higher than this threshold, the packet is
routed to the High queue. If the value is lower than or equal to this threshold, the
packet will be transferred to the Low queue (unless it is assigned a High priority
by another classifier).
Valid values range from 0 to 7.
The default value is 4.
4.2.6.6.3.2.3 DSCP Threshold
The DSCP Threshold parameter is applicable when the ToS Prioritization Option
is set to Enable DSCP (RFC2474) Prioritization. If the value of the 6 DSCP bits in
the IP header is higher than this threshold, the packet is routed to the High
queue. If the value is lower than or equal to this threshold, the packet will be
routed to the Low queue (unless it is assigned a High priority by another
classifier).
Valid values range from 0 to 63.
The default value is 32.
4.2.6.6.3.3 UDP/TCP Port Ranges Traffic Prioritization
The UDP/TCP Port Ranges Traffic Prioritization parameters enable defining
prioritization in accordance with the UDP and/or TCP destination port ranges.