QoS values for IP precedence, DSCP and MPLS EXP
November 20th, 2010
This table compares QoS values for IP precedence, Differentiated Services Code Point (DSCP) and Multiprotocol Label Switching (MPLS) Experimental (EXP) values along with standard values used in Cisco IOS Software for configuration.
Per Hop Behavior (PHB) | DSCP value | DSCP bits | IP precedence and Class of Service (COS) value (xyz000) | Comment: | MPLS EXP bits |
Default | 0 | 000000 | 0=routine |
|
|
1 | 000001 | ||||
2 | 000010 | ||||
3 | 000011 | ||||
4 | 000100 | ||||
5 | 000101 | ||||
6 | 000110 | ||||
7 | 000111 | ||||
CS1 | 8 | 001000 | 1=priority |
|
|
9 | 001001 | ||||
AF11 | 10 | 001010 |
|
||
11 | 001011 | ||||
AF12 | 12 | 001100 |
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||
13 | 001101 | ||||
AF13 | 14 | 001110 |
|
||
15 | 001111 | ||||
CS2 | 16 | 010000 | 2=immediate | 1 | |
17 | 010001 | ||||
AF21 | 18 | 010010 |
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||
19 | 010011 | ||||
AF22 | 20 | 010100 |
|
||
21 | 010101 | ||||
AF23 | 22 | 010110 |
|
||
23 | 010111 | ||||
CS3 | 24 | 011000 | 3=Flash | 2 | |
25 | 011001 | ||||
AF31 | 26 | 011010 |
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||
27 | 011011 | ||||
AF32 | 28 | 011100 |
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||
29 | 011101 | ||||
AF33 | 30 | 011110 |
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||
31 | 011111 | ||||
CS4 | 32 | 100000 | 4=FlashOver | 3 | |
33 | 100001 | ||||
AF41 | 34 | 100010 |
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||
35 | 100011 | ||||
AF42 | 36 | 100100 |
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||
37 | 100101 | ||||
AF43 | 38 | 100110 |
|
||
39 | 100111 | ||||
CS5 | 40 | 101000 | 5=critical | 1 | |
41 | 101001 | ||||
42 | 101010 | ||||
43 | 101011 | ||||
44 | 101100 | ||||
45 | 101101 | ||||
EF | 46 | 101110 | Recommended Expedited Forwarding (EF) value (used for voice traffic) | 6 | |
47 | 101111 | ||||
CS6 | 48 | 110000 | 6=internet | 0 | |
49 | 110001 | ||||
50 | 110010 | ||||
51 | 110011 | ||||
52 | 110100 | ||||
53 | 110101 | ||||
54 | 110110 | ||||
55 | 110111 | ||||
CS7 | 56 | 111000 | 7=network | 4 | |
57 | 111001 | ||||
58 | 111010 | ||||
59 | 111011 | ||||
60 | 111100 | ||||
61 | 111101 | ||||
62 | 111110 | ||||
63 | 111111 |