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PLANET VIP-152T User’s Manual
39
4.16. [tos] command
TOS/DiffServ (DS) priority function can discriminate the Differentiated Service Code Point (DSCP) of
the DS field in the IP packet header, and map each Code Point to a corresponding egress traffic priority.
As per the definition in RFC2474, the DS field is Type-of-Service (TOS) octet in IPv4. The
recommended DiffServ Code Point is defined in RFC2597 to classify the traffic into different service
classes. The mapping of Code Point value of DS-field to egress traffic priorities is shown as follows.
1. High priority with DS-field.
Expected Forwarding (EF) 101110 ====> 46 (Decimal System)
Assured Forwarding (AF) 001010 ====> 10 (Decimal System)
010010 ====> 18 (Decimal System)
011010 ====> 26 (Decimal System)
100010 ====> 34 (Decimal System)
2. Low Priority with DS-field:
Assured Forwarding (AF) 001100 ====> 12 (Decimal System)
010100 ====> 20 (Decimal System)
011100 ====> 28 (Decimal System)
100100 ====> 36 (Decimal System)
001110 ====> 14 (Decimal System)
010110 ====> 22 (Decimal System)
011110 ====> 30 (Decimal System)
100110 ====> 38 (Decimal System)
000000 ====> 0 (Decimal System)
1. -print : display all current configurations.
2. –rtptype: set DSCP value of signaling packets from 0 to 63
3. –siptype: set DSCP value of RTP packets from 0 to 63
"
Note:
This command won’t be functional until whole network environment support DSCP function,
e.g. all routers or switches in your network have enabled DSCP feature.
usr/config$ tos
IP Packet ToS(type of Service)/Differentiated Service configuration
Usage:
tos [-rtptype dscp]
tos [-sigtype dscp]
tos -print
[-rtpreliab mode]
tos -print
Example:
tos -rtptype 7 -sigtype 0
usr/config$