Table of Contents

Chapter 1 QoS Commands. 1-1

1.1 QoS Commands. 1-1

1.1.1 display protocol-priority. 1-1

1.1.2 display qos cos-local-precedence-map. 1-1

1.1.3 display qos-interface all 1-2

1.1.4 display qos-interface line-rate. 1-3

1.1.5 display queue-scheduler 1-4

1.1.6 line-rate. 1-4

1.1.7 priority. 1-5

1.1.8 priority trust 1-6

1.1.9 protocol-priority protocol-type. 1-7

1.1.10 qos cos-local-precedence-map. 1-9

1.1.11 queue-scheduler 1-11

 

Chapter 1  QoS Commands

1.1  QoS Commands

1.1.1  display protocol-priority

Syntax

display protocol-priority

View

Any view

Parameter

None

Description

Use the display protocol-priority command to display the priority of the protocol packet.

Example

# Display the priority of the protocol packet.

<H3C> display protocol-priority

Protocol: telnet

  DSCP: be(0)

1.1.2  display qos cos-local-precedence-map

Syntax

display qos cos-local-precedence-map

View

Any view

Parameter

None

Description

Use the display qos cos-local-precedence-map command to display the “COS-to-local-precedence” mapping table.

Example

# Display the “COS-to-local-precedence” mapping table.

<H3C> display qos cos-local-precedence-map

cos-local-precedence-map:

              cos(802.1p) :    0    1    2     3     4     5     6     7

------------------------------------------------------------------------

 local precedence(queue) :     0    1    2     3     4     5     6     7

1.1.3  display qos-interface all

Syntax

display qos-interface { interface-type interface-number | unit-id } all

View

Any view

Parameter

interface-type interface-number: Port index.

unit-id: Unit ID of the switch.

Description

Use the display qos-interface all command to display all the QoS configuration of the ports. If you do not input port parameters, this command will display the QoS parameter configuration of all the ports of the switch, including priority remark, queue scheduling, rate limit, etc; if you input port parameters, this command will display QoS parameter configuration of the port, including priority remark, queue scheduling, rate limit, etc.

When the IRF feature is enabled, the interface-type interface-number argument or the unit-id argument must be input.

Example

# Display all the QoS parameter configuration on Ethernet1/0/1.

<H3C> display qos-interface Ethernet 1/0/1 all

 

Ethernet1/0/1: line-rate

   Inbound: 128 kbps

   Outbound: 1024 kbps

 

Ethernet1/0/1:

 

 Queue scheduling mode: strict-priority

1.1.4  display qos-interface line-rate

Syntax

display qos-interface { interface-type interface-number | unit-id } line-rate

View

Any view

Parameter

interface-type interface-number: Port index.

unit-id: Unit ID of the switch.

Description

Use the display qos-interface line-rate command to display the rate limit configuration of a port or all the ports of a switch. If you do not specify the interface-type interface-number argument, this command will display the rate limit configuration of all the ports of a switch; if you specify that argument, this command will display the rate limit configuration of a specific port.

Example

# Display the rate limit configuration of a specific port.

<H3C> display qos-interface 1 line-rate

Ethernet1/0/1: line-rate

   Inbound: 128 kbps

1.1.5  display queue-scheduler

Syntax

display queue-scheduler

View

Any view

Parameter

None

Description

Use the display queue-scheduler command to display global queue scheduling mode and corresponding configuration.

Related command: queue-scheduler.

Example

# Display the global queue scheduling mode.

<H3C> display queue-scheduler

Queue scheduling mode: strict-priority

1.1.6  line-rate

Syntax

line-rate { inbound | outbound } target-rate

undo line-rate{ inbound | outbound }

View

Ethernet port view

Parameter

inbound: Limits the rate of inbound packets.

outbound: Limits the rate of outbound packets.

target-rate: Total rate (in Kbps) to limit both the inbound and outbound packets on the port, with the granularity of rate limit being 64 Kbps. If the number you input is in the range of N*64 to (N+1)*64 (N is a natural number), the switch will set the value to (N+1)*64 Kbps automatically. The target rate range for fast Ethernet ports and Gigabit Ethernet ports respectively is:

l           Fast Ethernet port: 64 to 99,968

l           Gigabit Ethernet port: 64 to 1,000,000

Description

Use the line-rate command to limit the rate of the packets on the port.

Use the undo line-rate command to cancel the rate limit configuration on the port.

The granularity of rate limit is 64 Kbps.

Example

# Limit the rate of inbound packets on Ethernet1/0/1 to 128 Kbps.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] interface Ethernet 1/0/1

[H3C-Ethernet1/0/1] line-rate inbound 128

1.1.7  priority

Syntax

priority priority-level

undo priority

View

Ethernet port view

Parameter

priority-level: Priority level of the port, ranging from 0 to 7.

Description

Use the priority command to configure the priority of Ethernet port.

Use the undo priority command to restore the default port priority.

By default, the switch uses the port priority instead of the 802.1p priority carried by a packet.

After this command is configured, the switch will replace the packet 802.1p priority with the priority of the receiving port, according to which the packet will be put into the corresponding egress queue.

Example

# Set the priority of Ethernet1/0/1 port to 6.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] interface Ethernet 1/0/1

[H3C-Ethernet1/0/1] priority 6

1.1.8  priority trust

Syntax

priority trust

undo priority

View

Ethernet port view

Parameter

None

Description

Use the priority trust command to configure the system to use the packet 802.1p priority instead of the port priority.

Use the undo priority command to configure the system not to use packet 802.1p priority.

By default, the system replaces the priority carried by a packet with the port priority.

Example

# Configure the system to use the packet priority on Ethernet1/0/1.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] interface Ethernet 1/0/1

[H3C-Ethernet1/0/1] priority trust

1.1.9  protocol-priority protocol-type

Syntax

protocol-priority protocol-type protocol-type { ip-precedence ip-precedence | dscp dscp-value }

undo protocol-priority protocol-type protocol-type

View

System view

Parameter

protocol-type protocol-type: Specifies the protocol type. Only TELNET, SNMP, ICMP and OSPF are supported currently.

ip-precedence ip-precedence: Specifies the IP precedence, in the range of 0 to 7. You can enter the keywords as shown in Table 1-1 .

Table 1-1 Description on IP precedence values

Keyword	IP precedence value (decimal)	IP precedence value (binary)
routine	0	000
priority	1	001
immediate	2	010
flash	3	011
flash-override	4	100
critical	5	101
internet	6	110
network	7	111

 

dscp dscp-value: Specifies the DSCP priority, in the range of 0 to 63. You can also enter the keywords listed in Table 1-2.

Table 1-2 Description on DSCP values

Keyword	DSCP value (decimal)	DSCP value (binary)
ef	46	101110
af11	10	001010
af12	12	001100
af13	14	001110
af21	18	010010
af22	20	010100
af23	22	010110
af31	26	011010
af32	28	011100
af33	30	011110
af41	34	100010
af42	36	100100
af43	38	100110
cs1	8	001000
cs2	16	010000
cs3	24	011000
cs4	32	100000
cs5	40	101000
cs6	48	110000
cs7	56	111000
be (default)	0	000000

 

Description

Use the protocol-priority command to set the global traffic priority for a specific protocol type.

Use the undo protocol-priority command to cancel the settings.

Example

# Set the IP precedence of SNMP protocol packets to 3.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] protocol-priority protocol-type snmp ip-precedence 3

1.1.10  qos cos-local-precedence-map

Syntax

qos cos-local-precedence-map cos0-map-local-prec cos1-map-local-prec cos2-map-local-prec cos3-map-local-prec cos4-map-local-prec cos5-map-local-prec cos6-map-local-prec cos7-map-local-prec

undo qos cos-local-precedence-map

View

System view

Parameter

cos0-map-local-prec: Local precedence to which CoS 0 is to be mapped, in the range of 0 to 7.

cos1-map-local-prec: Local precedence to which CoS 1 is to be mapped, in the range of 0 to 7.

cos2-map-local-prec: Local precedence to which CoS 2 is to be mapped, in the range of 0 to 7.

cos3-map-local-prec: Local precedence to which CoS 3 is to be mapped, in the range of 0 to 7.

cos4-map-local-prec: Local precedence to which CoS 4 is to be mapped, in the range of 0 to 7.

cos5-map-local-prec: Local precedence to which CoS 5 is to be mapped, in the range of 0 to 7.

cos6-map-local-prec: Local precedence to which CoS 6 is to be mapped, in the range of 0 to 7.

cos7-map-local-prec: Local precedence to which CoS 7 is to be mapped, in the range of 0 to 7.

Description

Use the qos cos-local-precedence-map command to configure the “CoS-to-local-precedence” mapping table.

Use the undo qos cos-local-precedence-map command to restore the default values.

The following is the default “CoS-to-local-precedence” mapping table.

Table 1-3 Default “CoS-to-local-precedence” mapping table

CoS value	Local precedence
0	2
1	0
2	1
3	3
4	4
5	5
6	6
7	7

 

Example

# Configure the “CoS-to-local-precedence” mapping table.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] qos cos-local-precedence-map 0 1 2 3 4 5 6 7

The following is the configured "CoS-to-local-precedence” mapping table.

Table 1-4 “CoS-to-local-precedence” mapping table

CoS value	Local precedence
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7

 

1.1.11  queue-scheduler

Syntax

I. In system view

queue-scheduler { strict-priority | wrr queue0-weight queue1-weight queue2-weight queue3-weight queue4-weight queue5-weight queue6-weight queue7-weight }

undo queue-scheduler

II. In Ethernet port view

queue-scheduler wrr queue0-weight queue1-weight queue2-weight queue3-weight queue4-weight queue5-weight queue6-weight queue7-weight

undo queue-scheduler

View

System view/Ethernet port view

Parameter

strict-priority: Indicates that the queue uses strict priority (SP) scheduling algorithm.

wrr: Indicates that the queue uses weighted round robin (WRR) scheduling.

queue0-weight queue1-weight queue2-weight queue3-weight queue4-weight queue5-weight queue6-weight queue7-weight: Indicates that the queue uses the WRR scheduling. The value ranges from 0 to 15. A value of 0 means the corresponding queue uses the SP scheduling.

Description

Use the queue-scheduler command to configure the queue scheduling mode.

Use the undo queue-scheduler command to restore the default value.

The queue scheduling algorithm defined by executing the queue-scheduler command in system view takes effect on all the ports of the switch. The queue scheduling algorithm defined by executing the queue-scheduler command in Ethernet port view takes effect on the current port only. If the weight of the WRR queue scheduling algorithm defined globally cannot satisfy the requirement of a port, you can modify the weight of the queue scheduling algorithm for this port in Ethernet port view of this port. On this port, the newly defined queue weight will replace the globally defined one. You cannot use the display queue-scheduler command to display the queue weight defined in Ethernet port view.

A port of the switch supports eight egress queues and you can configure a queue scheduling mode, which can be  SP, WRR, as needed to achieve the implementation of WRR+SP. For example, with WRR, if you set the weight of one or more queues to 0, the SP applies to the queue(s) and WRR apply to other queues.

By default, the WRR algorithm is selected for all outbound queues on a port, and their weight values are 1, 2, 3, 4, 5, 9, 13, and 15.

Related command: display queue-scheduler.

Example

# Set WRR as the queue scheduling mode, and set the weight value of each queue to 1, 2, 3, 4, 5, 6, 7, and 8, respectively.

<H3C> system-view

System View: return to User View with Ctrl+Z.

[H3C] interface Ethernet 1/0/1

[H3C-Ethernet1/0/1] queue-scheduler wrr 1 2 3 4 5 6 7 8