Solectek skyway - 13. Quality of Service (QoS); Introduction; QoS Implementation in Access

30
Voice Video Normal Background
Precedence
Class of Service
0
Best Effort
1
Background
2
Background
3
Best Effort
4
Video
5
Video
6
Voice
7
Voice
If there is no classification, (no VLAN and IP TOS 0) the packet falls under the Best Effort class. If
the packet has both VLAN and IP precedence values, the maximum of the two priorities (VLAN/IP) is
used.
The following table shows the mapping of class of service on various DSCP/TOS values.
Class of Service
IP
Precedence
(3 bits)
DSCP (6 bits)
TOS (8 bits)
Best Effort
0,3
0x0 (0)
0x0