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VLAN and TOS/QOS: Type and Quality of Service
DCSP (Differentiated Sevices Code Point) is a protocol for classifying and controlling
network traffic, so that certain types of traffic get precedence, while the quality of
transmission is maintained.
The following table illustrates the DSCP–to-priority mapping structure.
DSCP RANGE PRIORITY
0-7 0
8-15 1
16-23 2
24-31 3
32-39 4
40-47 5
48-55 6
56-63 7
The value of a non-ip packet is 5.
The following configuration settings are used to set the DSCP values for different IP
protocols. The parameters are case-sensitive.
Configurable through the configuration files only
Parameter tos rtp
DSCP value for RTP protocol
Description
Integer
Format
32
Default Value
4
Default Priority
0-63
Range
tos rtp: 2
Example
SIP 480i IP Phone Admin Guide 17