How the DSCP Marking Works for Control Signaling

The SMF marks the ingress and egress packets after the QoS classification. The protocol endpoints provide the DSCP values at the time of registering the Endpoint and RPC host.

The SMF uses the dscp command in the endpoint and interface configuration to define the DSCP values.

The following table lists the commonly used DSCP values as described in RFC 2475.

Commonly Used DSCP Values

DSCP Value

Decimal Value

Meaning

Drop Probability

Equivalent IP Precedence Value

101 110

46

High Priority Expedited Forwarding (EF)

N/A

101 - Critical

000 000

0

Best Effort

N/A

000 - Routine

001 010

10

AF11

Low

001 - Priority

001 100

12

AF12

Medium

001 - Priority

001 110

14

AF13

High

001 - Priority

010 010

18

AF21

Low

010 - Immediate

010 100

20

AF22

Medium

010 - Immediate

010 110

22

AF23

High

010 - Immediate

011 010

26

AF31

Low

011 - Flash

011 100

28

AF32

Medium

011 - Flash

011 110

30

AF33

High

011 - Flash

100 010

34

AF41

Low

100 - Flash Override

100 100

36

AF42

Medium

100 - Flash Override

100 110

38

AF43

High

100 - Flash Override

001 000

8

CS1

1

010 000

16

CS2

2

011 000

24

CS3

3

100 000

32

CS4

4

101 000

40

CS5

5

110 000

48

CS6

6

111 000

56

CS7

7

000 000

0

Default

101 110

46

EF