Cisco Nexus 7000 Series Installation manual

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Cisco Nexus 7000 Series NX-OS Quality of
Service Command Reference, Release 5.x
October 2010
Text Part Number: OL-23378-01

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Cisco Nexus 7000 Series NX-OS Quality of Service Command Reference, Release 5.x
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© 2008–2010 Cisco Systems, Inc. All rights reserved.

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CONTENTS
New and Changed Information v
Preface vii
Audience vii
Organization vii
Document Conventions vii
Related Documentation viii
Obtaining Documentation and Submitting a Service Request ix
Cisco Nexus 7000 Series NX-OS Quality of Service Commands QOS-1
bandwidth (QoS) QOS-2
bandwidth remaining QOS-5
class (policy map type qos) QOS-7
class type queuing (policy map type queuing) QOS-9
class-map type qos QOS-11
class-map type queuing match-any QOS-13
clear qos statistics QOS-14
default (table map) QOS-16
description QOS-17
from (table map) QOS-18
match access-group QOS-19
match class-map QOS-20
match cos (class map type qos) QOS-21
match cos (class map type queuing) QOS-23
match discard-class QOS-25
match dscp QOS-26
match ip rtp QOS-28
match packet length QOS-29
match precedence QOS-30
match protocol QOS-32
match qos-group QOS-34
police (QoS) QOS-36

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Contents
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police aggregate QOS-39
policy-map type qos QOS-41
policy-map type queuing QOS-43
priority (queuing) QOS-45
qos shared-policer QOS-47
qos statistics QOS-50
queue-limit QOS-51
random-detect QOS-53
random-detect cos-based QOS-56
service-policy QOS-58
set cos (policy map type qos) QOS-60
set cos (policy map type queuing) QOS-61
set discard-class QOS-63
set dscp (QoS) QOS-64
set precedence (QoS) QOS-66
set qos-group QOS-68
set table QOS-69
shape QOS-71
show class-map type qos QOS-73
show class-map type queuing QOS-75
show policy-map QOS-77
show policy-map interface QOS-79
show policy-map interface brief QOS-82
show policy-map vlan QOS-84
show qos shared-policer QOS-86
show queuing interface QOS-87
show running-config ipqos QOS-89
show table-map QOS-94
table-map QOS-96

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v
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New and Changed Information
This chapter provides release-specific information for each new and changed feature in the Cisco Nexus
7000 Series NX-OS Quality of Service Command Reference, Release 5.x.
To check for additional information about Cisco NX-OS Release 5.1(1), see the Cisco Nexus 7000 Series
NX-OS Release Notes, Release 5.x available at the following Cisco website:
http://www.cisco.com/en/US/docs/switches/datacenter/sw/5_x/nx-os/release/notes/51_nx-os_release_
note.html
Table 1 summarizes the new and changed features for the Cisco Nexus 7000 Series NX-OS Quality of
Service Command Reference, Release 5.x.
Ta b l e 1 New and Changed Features for Release 5.1(1)
Feature Description
Changed in
Release Where Documented
Network QoS Policy Added the ability to define the characteristics
of each CoS value by configuring a network
qos policy.
5.1(1) class-map type network-qos
match-any,
congestion-control,
match cos (class map type
network-qos),
mtu,
pause,
policy-map type network-qos,
qos copy policy-map,
show class-map type
network-qos,
show policy-map system type
network-qos,
show policy-map type
network-qos,
show qos dcbxp
Priority Flow Control Added the ability to configure priority flow
control to avoid frame loss due to congestion.
5.1(1) priority-flow-control mode,
show interface
priority-flow-control
Match IPv6 Added the ability to match match IPv6 as well
as IPv4 ACLs.
4.1(2) match access-group

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New and Changed Information
Only similar values in
mutation mapping
Added the limitation to set only similar values
when a mutation map is created. For example,
you can set cos-cos or dscp-dscp; you cannot
set cos-dscp or dscp-precedence.
4.1(2) set table
The qos-dynamic
variable
Added the ability for the qos-dynamic
variable to list the class-map and policy-map
names that are already configured in a class.
4.2(1) class (policy map type qos)
Table 1 New and Changed Features for Release 5.1(1) (continued)
Feature Description
Changed in
Release Where Documented

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Preface
This preface describes the audience, organization, and conventions of the Cisco Nexus 7000 Series
NX-OS Quality of Service Command Reference, Release 5.x. It also provides information on how to
obtain related documentation.
This chapter includes the following sections:
• Audience, page vii
• Organization, page vii
• Document Conventions, page vii
• Related Documentation, page viii
• Obtaining Documentation and Submitting a Service Request, page ix
Audience
This publication is for experienced users who configure and maintain NX-OS devices.
Organization
This reference is organized as follows:
Document Conventions
Command descriptions use these conventions:
Chapter and Title Description
New and Changed Information Describes the new and changed information for
each Cisco NX-OS software release.
Cisco Nexus 7000 Series NX-OS Quality of
Service Commands
Describes the Cisco NX-OS quality of service
commands.
Convention Description
boldface font Commands and keywords are in boldface.

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Preface
Screen examples use these conventions:
This document uses the following conventions:
Note Means reader take note. Notes contain helpful suggestions or references to material not covered in the
manual.
Caution Means reader be careful. In this situation, you might do something that could result in equipment
damage or loss of data.
Tip Means the following information will help you solve a problem.
Related Documentation
Cisco NX-OS includes the following documents:
Release Notes
Cisco Nexus 7000 Series NX-OS Release Notes, Release 5.x
NX-OS Configuration Guides
Cisco Nexus 7000 Series NX-OS Getting Started with Virtual Device Contexts, Release 5.x
Cisco Nexus 7000 Series OTV Quick Start Guide
Cisco Nexus 7000 Series NX-OS Fundamentals Configuration Guide, Release 5.x
Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x
italic font Arguments for which you supply values are in italics.
[ ] Elements in square brackets are optional.
[ x| y| z] Optional alternative keywords are grouped in brackets and separated by vertical
bars.
string A nonquoted set of characters. Do not use quotation marks around the string or
the string will include the quotation marks.
screen font Terminal sessions and information that the switch displays are in screen font.
boldface screen
font
Information you must enter is in boldface screen font.
italic screen font Arguments for which you supply values are in italic screen font.
< > Nonprinting characters, such as passwords, are in angle brackets.
[ ] Default responses to system prompts are in square brackets.
!, # An exclamation point (!) or a pound sign (#) at the beginning of a line of code
indicates a comment line.

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Preface
Cisco Nexus 7000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.x
Cisco Nexus 7000 Series NX-OS Quality of Service Configuration Guide, Release 5.x
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 5.x
Cisco Nexus 7000 Series NX-OS Multicast Routing Configuration Guide, Release 5.x
Cisco Nexus 7000 Series NX-OS Security Configuration Guide, Release 5.x
Cisco Nexus 7000 Series NX-OS OTV Configuration Guide, Release 5.x
Cisco Nexus 7000 Series NX-OS Virtual Device Context Configuration Guide, Release 5.x
Cisco Nexus 7000 Series NX-OS FabricPath Configuration Guide, Release 5.x
Cisco Nexus 7000 Series NX-OS Software Upgrade and Downgrade Guide, Release 5.x
Cisco NX-OS Licensing Guide
Cisco Nexus 7000 Series NX-OS High Availability and Redundancy Guide, Release 5.x
Cisco Nexus 7000 Series NX-OS System Management Configuration Guide, Release 5.x
Cisco NX-OS XML Management Interface User Guide, Release 5.x
Cisco NX-OS System Messages Reference
Cisco Nexus 7000 Series NX-OS MIB Quick Reference
NX-OS Command References
Cisco Nexus 7000 Series NX-OS Command Reference Master Index, Release 5.x
Cisco Nexus 7000 Series NX-OS Fundamentals Command Reference, Release 5.x
Cisco Nexus 7000 Series NX-OS Interfaces Command Reference, Release 5.x
Cisco Nexus 7000 Series NX-OS Layer 2 Switching Command Reference, Release 5.x
Cisco Nexus 7000 Series NX-OS Quality of Service Command Reference, Release 5.x
Cisco Nexus 7000 Series NX-OS Unicast Routing Command Reference, Release 5.x
Cisco Nexus 7000 Series NX-OS Multicast Routing Command Reference, Release 5.x
Cisco Nexus 7000 Series NX-OS Security Command Reference, Release 5.x
Cisco Nexus 7000 Series NX-OS OTV Command Reference, Release 5.x
Cisco Nexus 7000 Series NX-OS Virtual Device Context Command Reference, Release 5.x
Cisco Nexus 7000 Series NX-OS FabricPath Command Reference, Release 5.x
Cisco Nexus 7000 Series NX-OS System Management Command Reference, Release 5.x
Other Software Document
Cisco Nexus 7000 Series NX-OS Troubleshooting Guide
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, submitting a service request, and gathering additional
information, see the monthly What’s New in Cisco Product Documentation, which also lists all new and
revised Cisco technical documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

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Preface
Subscribe to the What’s New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed
and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free
service and Cisco currently supports RSS version 2.0.

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QOS-1
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Cisco Nexus 7000 Series NX-OS Quality of
Service Commands
This chapter describes the Cisco NX-OS quality of service (QoS) commands.

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Cisco Nexus 7000 Series NX-OS Quality of Service Commands
bandwidth (QoS)
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bandwidth (QoS)
To allocate a minimum percentage of the interface bandwidth to a queue and configure the bandwidth
on both ingress and egress queues, use the bandwidth command. To remove a bandwidth configuration,
use the no form of this command.
bandwidth {rate[bps | kbps | mbps | gbps] | percent percent}
no bandwidth {rate[bps | kbps | mbps | gbps] | percent percent}
Syntax Description
Defaults None
Command Modes Policy map type queuing class configuration
SupportedUserRoles network-admin
vdc-admin
Command History
Usage Guidelines You can use the system-defined ingress or egress queue class for the type of module to which you want
toapply the policy map. For more information about system-defined type queuing class maps, see
Table 1.
rate Bandwidth rate. The range is from 1 to 10000000000.
bps (Optional) Specifies the units of bits per second.
kbps (Optional) Specifies the units of 1000 bits per second.
mbps (Optional) Specifies the units of megabits per second.
gbps (Optional) Specifies the units of gigabits per second.
percent Specifies the percentage of bandwidth of the underlying link rate.
percent Percent value in the range from 1 to 100.
Release Modification
4.0 This command was introduced.
Ta b l e 1 System-Defined Type queuing Class Maps
Class Map Queue Name Description Default CoS Values
1 Gigabit Module Ingress: 2 queues with 4 thresholds per queue
2q4t-in-q1 Ingress queue 1 of 2q4t type 5-7
2q4t-in-q-default Ingress default queue of 2q4t type 0-4
1 Gigabit Module Egress: 1 strict priority queue and 3 normal queues with 4 thresholds per
queue

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Cisco Nexus 7000 Series NX-OS Quality of Service Commands
bandwidth (QoS)
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Note After you use this command in a specified policy map, you cannot use the priority or shape command
in the same policy map.
This command does not require a license.
Examples This example shows how to specify a bandwidth rate for a queue:
switch(config)# policy-map type queuing my_policy1
switch(config-pmap-que)# class type queuing 1p7q4t-out-pq1
switch(config-pmap-c-que)# bandwidth 10 mbps
This example shows how to remove a bandwidth rate for a queue:
switch(config)# policy-map type queuing my_policy1
1p3q4t-out-pq1 1Egress priority queue of 1p3q4t type 5-7
1p3q4t-out-q2 Egress queue 2 of 1p3q4t type –
1p3q4t-out-q3 Egress queue 3 of 1p3q4t type –
1p3q4t-out-q-default Egress default queue of 1p3q4t type 0-4
10 Gigabit Module Ingress: 8 queues with 2 thresholds per queue
8q2t-in-q1 Ingress queue 1 of 8q2t type 5-7
8q2t-in-q2 Ingress queue 2 of 8q2t type –
8q2t-in-q3 Ingress queue 3 of 8q2t type –
8q2t-in-q4 Ingress queue 4 of 8q2t type –
8q2t-in-q5 Ingress queue 5 of 8q2t type –
8q2t-in-q6 Ingress queue 6 of 8q2t type –
8q2t-in-q7 Ingress queue 7 of 8q2t type –
8q2t-in-q-default Ingress default queue of 8q2t type 0-4
10 Gigabit Module Egress: 1 strict priority queue and 7 normal queues with 4 thresholds per
queue
1p7q4t-out-pq1 1Egress priority queue of 1p7q4t type 5-7
1p7q4t-out-q2 Egress queue 2 of 1p7q4t type –
1p7q4t-out-q3 Egress queue 3 of 1p7q4t type –
1p7q4t-out-q4 Egress queue 4 of 1p7q4t type –
1p7q4t-out-q5 Egress queue 5 of 1p7q4t type –
1p7q4t-out-q6 Egress queue 6 of 1p7q4t type –
1p7q4t-out-q7 Egress queue 7 of 1p7q4t type –
1p7q4t-out-q-default Egress default queue of 1p7q4t type 0-4
1. These are either priority or normal queues. If you use the priority keyword in your configuration, these are used as priority
queues. Otherwise, they are used as normal queues.
Table 1 System-Defined Type queuing Class Maps (continued)
Class Map Queue Name Description Default CoS Values

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Cisco Nexus 7000 Series NX-OS Quality of Service Commands
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switch(config-pmap-que)# class type queuing 1p7q4t-out-pq1
switch(config-pmap-c-que)# no bandwidth 10 mbps
Related Commands Command Description
bandwidth remaining Configures the bandwidth remaining on the interface in a queue.
show class-map Displays class maps.
show policy-map Displays policy maps and statistics.

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Cisco Nexus 7000 Series NX-OS Quality of Service Commands
bandwidth remaining
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bandwidth remaining
To configure the percentage of the bandwidth remaining on the interface after other allocations are
configured on both ingress and egress queues, use the bandwidth remaining command. To remove the
remaining bandwidth allocation, use the no form of this command.
bandwidth remaining percent {percent}
no bandwidth remaining percent {percent}
Syntax Description
Defaults None
Command Modes Policy map type queuing class configuration
SupportedUserRoles network-admin
vdc-admin
Command History
Usage Guidelines You can use the system-defined ingress or egress queue class for the type of module to which you want
toapply the policy map. For more information about system-defined type queuing class maps, see
Table 1. You can use this command with the priority command.
For more information on using this command, see the Cisco Nexus 7000 Series NX-OS Quality of Service
Configuration Guide, Release 5.x.
This command does not require a license.
Examples This example shows how to set the bandwidth remaining for the specified queue:
switch(config)# policy-map type queuing my_policy1
switch(config-pmap-que)# class type queuing 1p7q4t-out-pq1
switch(config-pmap-c-que)# bandwidth remaining percent 25
This example shows how to remove the bandwidth remaining for the specified queue:
switch(config)# policy-map type queuing my_policy1
switch(config-pmap-que)# class type queuing 1p7q4t-out-pq1
switch(config-pmap-c-que)# no bandwidth remaining percent 25
percent Percentage of remaining bandwidth on the underlying link. Valid values are
from 0 to 100.
Release Modification
4.0 This command was introduced.

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bandwidth remaining
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Related Commands Command Description
bandwidth Allocates a minimum percentage of the interface bandwidth to a queue.
show class-map Displays class maps.
show policy-map Displays policy maps and statistics.

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Cisco Nexus 7000 Series NX-OS Quality of Service Commands
class (policy map type qos)
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class (policy map type qos)
To add a reference to an existing qos class map in a policy map and enter the class mode, use the class
command. To remove a class from the policy map, use the no form of this command.
class [type qos] {class-map-name | qos-dynamic | class-default} [insert-before [type qos]
before-class-map-name]
no class {class-map-name | class-default}
Syntax Description
Defaults None
Command Modes Policy map type qos configuration
SupportedUserRoles network-admin
vdc-admin
Command History
Usage Guidelines Policy actions in the first class that matches the traffic type are performed.
This command does not require a license.
Examples This example shows how to add a reference to a class map at the end of a policy map:
switch(config)# policy-map my_policy1
switch(config-pmap)# class traffic_class2
switch(config-pmap-c-qos)#
type qos (Optional) Specifies the component type, which is qos for this class. By
default, the type is qos.
class-map-name Reference to a class map.
qos-dynamic Specifies already configured class maps.
class-default Specifies the reserved class name that matches all traffic not classified in
other classes in a policy map.
insert-before
before-class-map-name
(Optional) Specifies the position of this class in the policy. If not specified,
the class is placed at the end of the classes in the policy. Policy actions in
the first class that matches the traffic type are performed.
Release Modification
4.0 This command was introduced.
4.2(1) The qos-dynamic variable was added.

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class (policy map type qos)
QOS-8
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This example shows how to add a reference to a class map before an existing class map reference in a
policy map:
switch(config)# policy-map my_policy1
switch(config-pmap-qos)# class insert-before traffic_class2 traffic_class1
switch(config-pmap-c-qos)#
This example shows how to add a reference to the class-default class map in a policy map:
switch(config)# policy-map my_policy1
switch(config-pmap-qos)# class class-default
switch(config-pmap-c-qos)#
This example shows how to remove a class map reference in a policy map:
switch(config)# policy-map my_policy1
switch(config-pmap)# no class traffic_class1
switch(config-pmap)#
Related Commands Command Description
show class-map qos Displays class maps.
show policy-map Displays policy maps and statistics.

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Cisco Nexus 7000 Series NX-OS Quality of Service Commands
class type queuing (policy map type queuing)
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class type queuing (policy map type queuing)
To add a reference to an existing queuing class map in a policy map and enter the class mode, use the
class type queuing command. To remove a class from the policy map, use the no form of this command.
class type queuing class-map-name
no class type queuing class-map-name
Syntax Descriptionn
Defaults None
Command Modes policy map type queuing configuration
SupportedUserRoles network-admin
vdc-admin
Command History
Usage Guidelines Policy actions in the first class that matches the traffic type are performed.
This command does not require a license.
Examples This example shows how to add a reference to a class map at the end of a type queuing policy map:
switch(config)# policy-map type queuing my_policy1
switch(config-pmap-que)# class type queuing 8q2t-in-q4
switch(config-pmap-c-que)#
This example shows how to add a reference to a class map before an existing class map reference in a
type queuing policy map:
switch(config)# policy-map type queuing my_policy1
switch(config-pmap-que)# class type queuing 8q2t-in-q4 insert-before type queuing
8q2t-in-q2
switch(config-pmap-c-que)#
This example shows how to remove a class map reference in a type queuing policy map:
switch(config)# policy-map type queuing my_policy1
switch(config-pmap-que)# no class type queuing 8q2t-in-q4
switch(config-pmap-que)#
class-map-name Reference to a system-defined class map. For a list of the system-defined
type queuing class maps, see Table 1.
Release Modification
4.0 This command was introduced.

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Cisco Nexus 7000 Series NX-OS Quality of Service Commands
class type queuing (policy map type queuing)
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Related Commands Command Description
show class-map
queuing
Displays class maps.
show policy-map Displays policy maps and statistics.