No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

S12700 V200R010C00 Configuration Guide - QoS

This document describes the configurations of QoS functions, including MQC, priority mapping, traffic policing, traffic shaping, interface-based rate limiting, congestion avoidance, congestion management, packet filtering, redirection, traffic statistics, ACL-based simplified traffic policy, and HQoS.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Default Configuration

Default Configuration

Mapping from Priorities to CoS Values (PHBs) and Colors in the Inbound Direction in a DiffServ Domain

By default, the mappings in a DiffServ domain are as follows:
  • Table 3-2 lists the mappings from 802.1p priorities to PHBs and colors.
  • Table 3-3 lists the mappings from DSCP priorities to PHBs and colors.
  • Table 3-4 lists the mappings from EXP priorities in MPLS packets to PHBs and colors.
The mappings from interface priorities to PHBs and colors are similar to the mappings from 802.1p priorities to PHBs and colors. Colors of packets are only used to determine whether to drop packets and do not affect mappings between internal priorities and queues.
Table 3-2  Mappings from 802.1p priorities to PHBs and colors of incoming VLAN packets in a DiffServ domain

802.1p Priority

PHB

Color

0

BE

green

1

AF1

green

2

AF2

green

3

AF3

green

4

AF4

green

5

EF

green

6

CS6

green

7

CS7

green

Table 3-3  Mappings from DSCP priorities to PHBs and colors of incoming IP packets in the DiffServ domain

DSCP

PHB

Color

DSCP

PHB

Color

0

BE

green

32

AF4

green

1

BE

green

33

BE

green

2

BE

green

34

AF4

green

3

BE

green

35

BE

green

4

BE

green

36

AF4

yellow

5

BE

green

37

BE

green

6

BE

green

38

AF4

red

7

BE

green

39

BE

green

8

AF1

green

40

EF

green

9

BE

green

41

BE

green

10

AF1

green

42

BE

green

11

BE

green

43

BE

green

12

AF1

yellow

44

BE

green

13

BE

green

45

BE

green

14

AF1

red

46

EF

green

15

BE

green

47

BE

green

16

AF2

green

48

CS6

green

17

BE

green

49

BE

green

18

AF2

green

50

BE

green

19

BE

green

51

BE

green

20

AF2

yellow

52

BE

green

21

BE

green

53

BE

green

22

AF2

red

54

BE

green

23

BE

green

55

BE

green

24

AF3

green

56

CS7

green

25

BE

green

57

BE

green

26

AF3

green

58

BE

green

27

BE

green

59

BE

green

28

AF3

yellow

60

BE

green

29

BE

green

61

BE

green

30

AF3

red

62

BE

green

31

BE

green

63

BE

green

Table 3-4  Mappings from EXP priorities to PHBs and colors of incoming packets in the DiffServ domain

EXP Priority

PHB

Color

0

BE

green

1

AF1

green

2

AF2

green

3

AF3

green

4

AF4

green

5

EF

green

6

CS6

green

7

CS7

green

Mapping Between CoS Values and Interface Queue Indexes

By default, internal priorities (CoS of packets) and interface queues are mapped on a one-to-one basis. In real-world applications, you may need to change the mappings between CoS values and queues or map different CoS values to the same queue to avoid overburdening the device buffer. The device sends packets to different interface queues based on the internal priorities, and performs traffic shaping, congestion avoidance, and queue scheduling for the queues.

Table 3-5 and Table 3-6 list the mappings between internal priorities and queues.

Table 3-5  Mappings between internal priorities and queueson the SC series cards

Internal Priority

Queue Index

BE (unknown unicast packets, multicast packets, and broadcast packets)

0

AF1 (unknown unicast packets, multicast packets, and broadcast packets)

1

AF2 (unknown unicast packets, multicast packets, and broadcast packets)

1

AF3 (unknown unicast packets, multicast packets, and broadcast packets)

1

AF4 (unknown unicast packets, multicast packets, and broadcast packets)

2

EF (unknown unicast packets, multicast packets, and broadcast packets)

2

CS6 (unknown unicast packets, multicast packets, and broadcast packets)

6

CS7 (unknown unicast packets, multicast packets, and broadcast packets)

6

BE (known unicast packets)

0

AF1 (known unicast packets)

1

AF2 (known unicast packets)

2

AF3 (known unicast packets)

3

AF4 (known unicast packets)

4

EF (known unicast packets)

5

CS6 (known unicast packets)

6

CS7 (known unicast packets)

7

Table 3-6  Mappings between internal priorities and queues on other cards

Internal Priority

Queue Index

BE

0

AF1

1

AF2

2

AF3

3

AF4

4

EF

5

CS6

6

CS7

7

Mapping from CoS Values (PHBs) and Colors to Priorities in the Outbound Direction in the DiffServ Domain

By default, the mappings in a DiffServ domain are as follows:
  • Table 3-7 lists the mappings from PHBs and colors to 802.1p priorities.
  • Table 3-8 lists the mappings from PHBs and colors to DSCP priorities.
  • Table 3-9 lists the mappings from PHBs and colors to EXP priorities in MPLS packets.
The mappings from interface priorities to PHBs and colors are similar to the mappings from 802.1p priorities to PHBs and colors. Colors of packets are only used to determine whether to drop packets and do not affect mappings between internal priorities and queues.
Table 3-7  Mappings from PHBs and colors to 802.1p priorities of outgoing VLAN packets in the DiffServ domain

PHB

Color

802.1p Priority

BE

green

0

BE

yellow

0

BE

red

0

AF1

green

1

AF1

yellow

1

AF1

red

1

AF2

green

2

AF2

yellow

2

AF2

red

2

AF3

green

3

AF3

yellow

3

AF3

red

3

AF4

green

4

AF4

yellow

4

AF4

red

4

EF

green

5

EF

yellow

5

EF

red

5

CS6

green

6

CS6

yellow

6

CS6

red

6

CS7

green

7

CS7

yellow

7

CS7

red

7

Table 3-8  Mappings from PHBs and colors to DSCP priorities of outgoing IP packets in the DiffServ domain

PHB

Color

DSCP

BE

green

0

BE

yellow

0

BE

red

0

AF1

green

10

AF1

yellow

12

AF1

red

14

AF2

green

18

AF2

yellow

20

AF2

red

22

AF3

green

26

AF3

yellow

28

AF3

red

30

AF4

green

34

AF4

yellow

36

AF4

red

38

EF

green

46

EF

yellow

46

EF

red

46

CS6

green

48

CS6

yellow

48

CS6

red

48

CS7

green

56

CS7

yellow

56

CS7

red

56

Table 3-9  Mappings from PHBs and colors to EXP priorities of outgoing packets in the DiffServ domain

PHB

Color

EXP Priority

BE

green

0

BE

yellow

0

BE

red

0

AF1

green

1

AF1

yellow

1

AF1

red

1

AF2

green

2

AF2

yellow

2

AF2

red

2

AF3

green

3

AF3

yellow

3

AF3

red

3

AF4

green

4

AF4

yellow

4

AF4

red

4

EF

green

5

EF

yellow

5

EF

red

5

CS6

green

6

CS6

yellow

6

CS6

red

6

CS7

green

7

CS7

yellow

7

CS7

red

7

Translation
Download
Updated: 2019-08-21

Document ID: EDOC1000142089

Views: 43457

Downloads: 87

Average rating:
This Document Applies to these Products
Related Version
Related Documents
Share
Previous Next