Default Settings for Priority Mapping

CloudEngine 12800 and 12800E V200R005C10 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, and ACL-based simplified traffic policy.

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Default Settings for Priority Mapping

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

Table 3-3 lists the mapping from 802.1p priorities to CoS values (PHBs) and colors in the inbound direction in the DiffServ domain.
Table 3-4 lists the mapping from DSCP priorities in IP packets to CoS values (PHBs) and colors in the inbound direction in the DiffServ domain.
Table 3-5 lists the mapping from EXP priorities in MPLS packets to CoS values (PHBs) and colors in the inbound direction in the DiffServ domain.

The mapping from interface priorities to CoS values (PHBs) and colors is similar to the mapping from 802.1p priorities to CoS values (PHBs) and colors. Colors are used to determine whether the packets are discarded and are independent of the mapping between internal priorities and queues.

Table 3-3 Mapping from 802.1p priorities to CoS values (PHBs) and colors in the inbound direction in the DiffServ domain

802.1p Priority	CoS Value	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 3-4 Mapping from DSCP priorities in IP packets to CoS values (PHBs) and colors in the inbound direction in the DiffServ domain

DSCP	CoS Value	Color	DSCP	CoS Value	Color
0	BE	green	32	AF4	green
1	BE	green	33	AF4	green
2	BE	green	34	AF4	green
3	BE	green	35	AF4	green
4	BE	green	36	AF4	yellow
5	BE	green	37	AF4	green
6	BE	green	38	AF4	red
7	BE	green	39	AF4	green
8	AF1	green	40	EF	green
9	AF1	green	41	EF	green
10	AF1	green	42	EF	green
11	AF1	green	43	EF	green
12	AF1	yellow	44	EF	green
13	AF1	green	45	EF	green
14	AF1	red	46	EF	green
15	AF1	green	47	EF	green
16	AF2	green	48	CS6	green
17	AF2	green	49	CS6	green
18	AF2	green	50	CS6	green
19	AF2	green	51	CS6	green
20	AF2	yellow	52	CS6	green
21	AF2	green	53	CS6	green
22	AF2	red	54	CS6	green
23	AF2	green	55	CS6	green
24	AF3	green	56	CS7	green
25	AF3	green	57	CS7	green
26	AF3	green	58	CS7	green
27	AF3	green	59	CS7	green
28	AF3	yellow	60	CS7	green
29	AF3	green	61	CS7	green
30	AF3	red	62	CS7	green
31	AF3	green	63	CS7	green

Table 3-5 Mapping from EXP priorities in MPLS packets to CoS values (PHBs) and colors in the inbound direction in the DiffServ domain

EXP Priority	CoS Value	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

Table 3-6 lists the mapping between CoS values and queue indexes supported by the device.

Table 3-6 Mapping between CoS values and queue indexes

CoS Value	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

Table 3-7 lists the mapping from CoS values (PHBs) and colors to 802.1p priorities in the outbound direction in the DiffServ domain.
Table 3-8 lists the mapping from CoS values (PHBs) and colors to DSCP priorities in IP packets in the outbound direction in the DiffServ domain.
Table 3-9 lists the mapping from DSCP priorities to EXP priorities in the outbound direction in the DiffServ domain.

The mapping from CoS values (PHBs) and colors to interface priorities is similar to the mapping from CoS values (PHBs) and colors to 802.1p priorities. Colors are used to determine whether the packets are discarded and are independent of the mapping between internal priorities and queues.

Table 3-7 Mapping from CoS values (PHBs) and colors to 802.1p priorities in the outbound direction 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 Mapping from CoS values (PHBs) and colors to DSCP priorities in IP packets in the outbound direction 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 Mapping from DSCP priorities to EXP priorities in the outbound direction in the DiffServ domain

DSCP	EXP	DSCP	EXP
0	0	32	4
1	0	33	4
2	0	34	4
3	0	35	4
4	0	36	4
5	0	37	4
6	0	38	4
7	0	39	4
8	1	40	5
9	1	41	5
10	1	42	5
11	1	43	5
12	1	44	5
13	1	45	5
14	1	46	5
15	1	47	5
16	2	48	6
17	2	49	6
18	2	50	6
19	2	51	6
20	2	52	6
21	2	53	6
22	2	54	6
23	2	55	6
24	3	56	7
25	3	57	7
26	3	58	7
27	3	59	7
28	3	60	7
29	3	61	7
30	3	62	7
31	3	63	7

Mapping from DSCP Priorities in IP Packets to Internal DSCP Priorities in the Inbound Direction in the DiffServ Domain

One DSCP priority in IP packets maps to one internal DSCP priority with the same value in a DiffServ domain in the inbound direction. That is, if the DSCP priority of IP packets in the inbound direction is 1, the corresponding internal DSCP priority is also 1, and so on. Table 3-10 lists the mapping from DSCP priorities in IP packets to internal DSCP priorities in the inbound direction in the DiffServ domain.

Table 3-10 Mapping from DSCP priorities in IP packets to internal DSCP priorities in the inbound direction in the DiffServ domain

DSCP	IN-DSCP	DSCP	IN-DSCP
0	0	32	32
1	1	33	33
2	2	34	34
3	3	35	35
4	4	36	36
5	5	37	37
6	6	38	38
7	7	39	39
8	8	40	40
9	9	41	41
10	10	42	42
11	11	43	43
12	12	44	44
13	13	45	45
14	14	46	46
15	15	47	47
16	16	48	48
17	17	49	49
18	18	50	50
19	19	51	51
20	20	52	52
21	21	53	53
22	22	54	54
23	23	55	55
24	24	56	56
25	25	57	57
26	26	58	58
27	27	59	59
28	28	60	60
29	29	61	61
30	30	62	62
31	31	63	63

Mapping from Internal DSCP Priorities and Colors to DSCP Priorities in Packets in the Outbound Direction in the DiffServ Domain

One internal DSCP priority or color maps to one DSCP priority with the same value in IP packets in the outbound direction in a DiffServ domain. That is, for green, yellow, or red packets, if the internal DSCP priority is 1, the corresponding DSCP priority of IP packets in the outbound direction is also 1, and so on. Table 3-11 lists the mapping from internal DSCP priorities and colors to DSCP priorities in packets in the outbound direction in the DiffServ domain.

Table 3-11 Mapping from internal DSCP priorities and colors to DSCP priorities in packets in the outbound direction in the DiffServ domain

IN-DSCP	Color	DSCP	IN-DSCP	Color	DSCP
0	green/yellow/red	0	32	green/yellow/red	32
1	green/yellow/red	1	33	green/yellow/red	33
2	green/yellow/red	2	34	green/yellow/red	34
3	green/yellow/red	3	35	green/yellow/red	35
4	green/yellow/red	4	36	green/yellow/red	36
5	green/yellow/red	5	37	green/yellow/red	37
6	green/yellow/red	6	38	green/yellow/red	38
7	green/yellow/red	7	39	green/yellow/red	39
8	green/yellow/red	8	40	green/yellow/red	40
9	green/yellow/red	9	41	green/yellow/red	41
10	green/yellow/red	10	42	green/yellow/red	42
11	green/yellow/red	11	43	green/yellow/red	43
12	green/yellow/red	12	44	green/yellow/red	44
13	green/yellow/red	13	45	green/yellow/red	45
14	green/yellow/red	14	46	green/yellow/red	46
15	green/yellow/red	15	47	green/yellow/red	47
16	green/yellow/red	16	48	green/yellow/red	48
17	green/yellow/red	17	49	green/yellow/red	49
18	green/yellow/red	18	50	green/yellow/red	50
19	green/yellow/red	19	51	green/yellow/red	51
20	green/yellow/red	20	52	green/yellow/red	52
21	green/yellow/red	21	53	green/yellow/red	53
22	green/yellow/red	22	54	green/yellow/red	54
23	green/yellow/red	23	55	green/yellow/red	55
24	green/yellow/red	24	56	green/yellow/red	56
25	green/yellow/red	25	57	green/yellow/red	57
26	green/yellow/red	26	58	green/yellow/red	58
27	green/yellow/red	27	59	green/yellow/red	59
28	green/yellow/red	28	60	green/yellow/red	60
29	green/yellow/red	29	61	green/yellow/red	61
30	green/yellow/red	30	62	green/yellow/red	62
31	green/yellow/red	31	63	green/yellow/red	63

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Updated: 2021-08-12

Document ID: EDOC1100075349

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