Dscp To Queue - Linksys LGS308 User Manual

DSCP to Queue

The DSCP (IP Differentiated Services Code Point) to Queue page maps DSCP values to egress
queues. The DSCP to Queue Table determines the egress queues of the incoming IP packets
based on their DSCP values. The original VPT (VLAN Priority Tag) of the packet is unchanged.
By simply changing the DSCP to Queue mapping and the Queue schedule method and bandwidth
allocation, it is possible to achieve the desired quality of services in a network.
The DSCP to Queue mapping is applicable to IP packets if the device is in QoS Basic mode and
DSCP is the trusted mode. Non-IP packets are always classified to the best-effort queue.
The following tables describe the default DSCP to queue mapping:
DSCP 63
Queue 3
DSCP 62
Queue 3
DSCP 61
Queue 3
DSCP 60
Queue 3
DSCP 59
Queue 3
DSCP 58
Queue 3
DSCP 57
Queue 3
DSCP 56(CS7)
Queue 3
The queue 4 is the highest queue and the default classes in the parentheses are defined by IETF.
55 47
3 4
54 46 (EF)
3 4
53 45
3 4
52 44
3 4
51 43
3 4
50 42
3 4
49 41
3 4
48(CS6) 40(CS5)
3 4
39 31
3 3
38 (AF3) 30 (AF33)
3 3
37 29
3 3
36(AF42) 28(AF32)
3 3
35 27
3 3
34(AF41) 26(AF31)
3 3
33 25
3 3
32(CS4) 24(CS3)
3 3
23 15
2 1
22(AF23) 14
2 1
21 13
2 1
20(AF22) 12(AF12)
2 1
19 11
2 1
18(AF21) 10(AF11)
2 1
17 9
2 1
16(CS2) 8(CS1)
2 1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0(BE)
1
186