MP-202 Telephone Adapter
70
LTRT-50604
MP-202
Table
8-4: Add Traffic Priority Rule - Parameter Descriptions
Parameter
Description
Source Address
The source address of the packets sent to or
received from the network object. From the drop-
down list choose 'Any', 'User Defined' or the host.
Destination Address
The destination address of the packets sent to or
received from the network object. This address
can be configured in the same manner as the
source address. From the drop-down list choose
'Any', 'User Defined' or the host.
Protocol
From the drop-down list, choose a specific traffic
protocol, or add a new one by choosing 'User
Defined'; the screen 'Edit Service' opens. Click the
icon 'new' under the column 'Action'; this
commences a sequence that adds a new protocol.
QoS Operation
In this screen section, set a Quality of Service
working method. Check parameter 'Set Priority' or
'Set DSCP' (refer to the descriptions below).
Set Priority
Check this check box to add a priority to the rule;
the screen 'Edit Service' opens, allowing you to
select between one of eight priority levels, 0 =
lowest and 7 = highest (each priority level is
mapped to low/medium/high priority). This sets the
priority of a packet on the connection matching the
rule, while routing the packet.
Set DSCP
Check this check box to mark a DSCP value on
packets matching this rule; the screen 'Edit
Service' opens, allowing you to enter the
hexadecimal value of the DSCP.
Log Packets Matched by This Rule
Under the screen section 'Logging', this check box
must be checked in order to log the first packet
from a connection that was matched by this rule.
Schedule
'Always' or 'User Defined'. By default, the rule will
always be active. However, you can configure
scheduler rules in order to define time segments
during which the rule may be active.
Click ’OK’ to save the settings
8.3 DSCP
Mapping
In order to understand what is Differentiated Services Code Point (DSCP), one must first
be familiarized with the Differentiated Services model.
Differentiated Services (Diffserv) is a Class of Service (CoS) model that enhances best-
effort Internet services by differentiating traffic by users, service requirements and other
criteria. Packets are specifically marked, allowing network nodes to provide different levels
of service, as appropriate for voice calls, video playback or other delay-sensitive
applications, via priority queuing or bandwidth allocation, or by choosing dedicated routes
for specific traffic flows.