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.
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 |