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 on an Interface in the DiffServ Domain

Table 4-2 lists the mapping from 802.1p priorities to CoS values (PHBs) and colors in the inbound direction on an interface in the DiffServ domain.
Table 4-3 lists the mapping from DSCP priorities in IP packets to CoS values (PHBs) and colors in the inbound direction on an interface 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 4-2 Mapping from 802.1p priorities to CoS values (PHBs) and colors in the inbound direction on an interface 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 4-3 Mapping from DSCP priorities in IP packets to PHBs and colors in the inbound direction on an interface in the DiffServ domain

DSCP Priority	CoS Value	Color	DSCP Priority	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

Mapping Between CoS Values and Interface Queue Indexes

Table 4-4 lists the mapping between CoS values and queue indexes supported by the CE12800E.

Table 4-4 Mapping between CoS values and queue indexes supported by the CE12800E

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 4-5 lists the mapping from CoS values (PHBs) and colors to 802.1p priorities in the outbound direction on an interface in the DiffServ domain.
Table 4-6 lists the mapping from CoS values (PHBs) and colors to DSCP priorities in IP packets in the outbound direction on an interface 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 4-5 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 4-6 Mapping from CoS values (PHBs) and colors to DSCP priorities in IP packets in the outbound direction in the DiffServ domain

PHB	Color	DSCP Priority
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

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Updated: 2021-08-12

Document ID: EDOC1100075349

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