Cisco IOS XR Modular Quality of Service Command Reference for the Cisco XR 12000 Series Router, Release 4.1
Quality of Service Commands on the Cisco IOS XR Software
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Quality of Service Commands on the Cisco IOS XR Software

Contents

Quality of Service Commands on the Cisco IOS XR Software

This module lists quality of service (QoS) commands in alphabetical order. For detailed information about QoS concepts, configuration tasks, and examples, see the Cisco IOS XR Modular Quality of Service Configuration Guide for the Cisco XR 12000 Series Router.

bandwidth (QoS)

To specify the minimum bandwidth allocated to a class belonging to a policy map, use the bandwidth command in policy map class configuration mode. To remove the bandwidth specified for a class, use the no form of this command.

bandwidth { rate [units] | percent percentage-value }

no bandwidth { rate [units] | percent percentage-value }

Syntax Description

rate

Minimum bandwidth, in the units specified, to be assigned to the class. Range is from 1 to 4294967295. For 16 kbps granularity on 2.5 Gbps IP Services Engine (Engine 3) line cards, the maximum value is 1.05 gbps.

units

Specifies the units for the bandwidth. Values can be:

  • bps—bits per second
  • gbps—gigabits per second
  • kbps—kilobits per second (default)
  • mbps—megabits per second

percent percentage-value

Specifies the amount of guaranteed bandwidth, based on an absolute percentage of available bandwidth. Range is from 1 to 100.

Command Default

The default units is kbps.

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.3.0

The ability to select the units for the bandwidth was added.

The range of bandwidth values was changed from 8 to 4000000 to 1 to 4294967295.

Release 3.3.1

Minimum rate value changed from 128 kbps to 256 kbps.

Release 3.9.0

The granularity of the rates specified was changed to 8 kbps.

Usage Guidelines

You must be in a user group associated with a task group that includes the proper task IDs. The command reference guides include the task IDs required for each command. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The bandwidth command is used to specify the minimum guaranteed bandwidth allocated for traffic matching a particular class. Bandwidth may be defined as a specific value or may be set as a percentage of the interface bandwidth.

The actual bandwidth used is calculated in multiples of 8 kbps, the minimum bandwidth rate. The configured value is rounded down to a multiple of 8 kbps.

Line card Type

Ingress Granularity

Egress Granularity

2.5 Gbps IP Services Engine (Engine 3)**Exceptions: 1-Port OC-48c POS ISE                         4-Port OC-12c POS ISE

16 kbps64 kbps64 kbps

16 kbps64 kbps64 kbps

10 Gbps IP Services Engine (Engine 5)

32 kbps

32 kbps

Multirate 10G IP Services Engines (Engine 5+)

32 kbps

8 kbps

If a percentage value is set, the accuracy that can be expected is 1 percent.

The bandwidth command can be used only within egress service policies. Use within an ingress policy is not supported.


Note


The bandwidth value takes into account the Layer 2 encapsulation that is applied to traffic leaving the interface. For POS/SDH transmission, the encapsulation is considered to be 4 bytes. For Ethernet, the encapsulation is 14 bytes; whereas for IEEE 802.1Q, the encapsulation is 18 bytes. The actual bandwidth assigned to a class can be seen in the output of the show qos interface command.


Be careful when specifying bandwidth guarantees close to 100 percent, because the Layer 2 encapsulation considered does not include the entire Layer 2 header. This can lead to oversubscription, particularly in the case of small packet sizes.

For bundled interfaces, bandwidth can be configured only as a percentage.

A policy map can have a single bandwidth statement per class. Both percentage and actual value bandwidth configurations can be used within a policy map.

The bandwidth command does not specify how the bandwidth is to be shared. Instead it specifies how much bandwidth is guaranteed per class, by setting the number of tokens that are assigned to the token bucket of a particular class. For configured behavior to work correctly, you must ensure that the sum of the bandwidths plus any priority traffic is not greater than the bandwidth of the interface itself. If the interface is oversubscribed, unpredictable behavior results.

The bandwidth of the interface is set to be that of the physical interface, unless a hierarchical policy is defined that reduces the bandwidth available to the traffic. The following example shows a hierarchical policy being used to shape traffic to the specified value. The child policy then determines how the shaped bandwidth should be apportioned between the specified classes:

policy-map parent
  class match_all
  shape average 1000000
  bandwidth 1000000
    service-policy child

policy-map child
  class gold
    bandwidth percent 20
  class silver
    bandwidth percent 40
  class default
    bandwidth percent 40

Note


The bandwidth command is part of the parent policy. In this instance, the bandwidth command not only sets the minimum bandwidth for the class but also resets the reference point for the bandwidth percent statements in the child policy.


For main interface service policies:

  • If bandwidth is configured in the parent class, parent minimum bandwidth is used as a reference for the child bandwidth percentages.
  • If bandwidth is not configured in the parent class, the implicit minimum bandwidth, which is a portion of the total unallocated bandwidth allocated to the class based on the explicit or implicit bandwidth remaining, is used as a reference.Implicit bandwidth remaining is an equal share of unallocated bandwidth among all queuing classes without either bandwidth or bandwidth remaining actions.

For subinterface policies:

  • If bandwidth is configured in the parent class, parent minimum bandwidth is used as a reference for child bandwidth percentages.
  • If bandwidth remaining is configured in the parent class, bandwidth-remaining-percent * interface-rate is used as a reference.
  • If bandwidth is not configured in the parent class, shape rate is used as a reference.

In the following example, the hierarchical policy is attached to the main interface, and the parent classes are a mix of bandwidth and shape only classes:

policy-map hqos
 class c1
   bandwidth percent 40
    service-policy child
 class c2
   shape average 500000000
    service-policy child

The reference for the child policy in class c2 is the implicit bandwidth of class c2 bounded by the shape rate of class c2. Therefore, the reference = (60 percent * interface bandwidth) / 3 bounded by 500000000 kbps.

In the following example, the hierarchical policy is a class-default only parent shape configured on subinterfaces:

policy-map sub_int_hqos
 class c1ass-default
   shape average 40
    service-policy child

The class-default parent shape rate is used as reference.

When the percent keyword is used with the bandwidth command, the bandwidth of the interface is defined as being the Layer 2 capacity excluding the Gigabit Ethernet or POS encapsulation but including the High-Level Data Link Control (HDLC) flags, frame check sequence (FCS), and so on. These have to be included because they are applied per packet, and the system cannot predict how many packets of a particular packet size are being sent out.

For example, the following policy is applied to an OC-192 interface:

policy-map oc-192
  class c1
  bandwidth percent 50

The resulting bandwidth reservation for class c1 is 4,792,320 kbps. This equates to 50 percent of the OC-192 bandwidth excluding the GE or POS overhead.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to guarantee 50 percent of the interface bandwidth to a class called class1 and 10 percent of the interface bandwidth to a class called class2:

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# bandwidth percent 50
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# class class2
RP/0/0/CPU0:router(config-pmap-c)# bandwidth percent 10

Related Commands

Command

Description

class (policy-map)

Specifies the name of the class whose policy you want to create or change.  

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

queue-limit

Specifies or modifies the maximum number of packets the queue can hold for a class policy configured in a policy map.  

random-detect precedence

Configures the Weighted Random Early Detection (WRED) thresholds for packets with a particular IP precedence.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

show qos interface

Displays QoS information for a specific interface.  

bandwidth remaining

To specify how to allocate leftover bandwidth to various classes, use the bandwidth remaining command in policy map class configuration mode. To return to the system defaults, use the no form of this command.

bandwidth remaining percent percentage-value

no bandwidth remaining percent percentage-value

Syntax Description

percent percentage-value

Specifies the amount of guaranteed bandwidth, based on an absolute percentage of the available bandwidth. Range is from 1 to 100.

Command Default

No bandwidth is specified.

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Usage Guidelines

You must be in a user group associated with a task group that includes the proper task IDs. The command reference guides include the task IDs required for each command. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The bandwidth remaining command is used to set the Modified Deficit Round Robin (MDRR) weight for the particular class.

When applied within an egress service policy, the command is used to define how any unallocated bandwidth should be apportioned. It typically is used in conjunction with the bandwidth command. In such a combination, if the minimum bandwidth guarantees are met, the remaining bandwidth is shared in the ratio defined by the bandwidth remaining command in the class configuration in the policy map.

The available bandwidth is equally distributed among those queueing classes that do not have the remaining bandwidth explicitly configured.


Note


On egress, the actual bandwidth of the interface is determined to be the Layer 2 capacity excluding the Layer 2 encapsulation, but including the HDLC flags, FCS, and so on. These have to be included because they are applied per packet, and the system cannot predict how many packets of a particular packet size are being sent out.


On egress, if the bandwidth remaining command is not present, then the bandwidth is shared equally among the configured queueing classes present in the policy-map. When attempting precise calculations of expected MDRR behavior, you must bear in mind that because you are dealing with the bandwidth remaining on the link, you must convert the values to the bandwidth remaining percentages on the link, based upon the packet sizes of the traffic within the class. If the packet sizes are the same in all the classes, then the defined ratio is enforced precisely and predictably on the link.

The bandwidth remaining command is not supported on ingress.

Task ID

Task ID

Operations

qos

read, write

Examples

In the following example, a class called class1 is guaranteed 50 percent of the interface bandwidth and a class called class2 is guaranteed 10 percent of the interface bandwidth. The remaining bandwidth of 40 percent is shared by classes class1 and class2 in a 20:80 ratio: class class1 receives 20 percent of the 40 percent, and class class2 receives 80 percent of the 40 percent.

RP/0/0/CPU0:router(config)#policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# bandwidth percent 50
RP/0/0/CPU0:router(config-pmap-c)#bandwidth remaining percent 20
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)#class class2
RP/0/0/CPU0:router(config-pmap-c)# bandwidth percent 10
RP/0/0/CPU0:router(config-pmap-c)# bandwidth remaining percent 80
  

child-conform-aware

To prevent the parent policer from dropping any ingress traffic that conforms to the maximum rate specified in the child policer, use the child-conform-aware command in policy map police configuration mode. To remove this action from the policy map, use the no form of this command.

child-conform-aware

no child-conform-aware

Syntax Description

This command has no keywords or arguments.

Command Default

The child-conform-aware command is not configured.

Command Modes

Policy map police configuration

Command History

Release

Modification

Release 3.8.0

This command was introduced.

Usage Guidelines

You must be in a user group associated with a task group that includes the proper task IDs. The command reference guides include the task IDs required for each command. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

In hierarchical policing, traffic is policed first at the child policer level and then at the parent policer level. It is possible for traffic that conforms to the maximum rate specified by the child policer to be dropped by the parent policer.

In enhanced hierarchical ingress policing, the child-conform-aware command prevents the parent policer from dropping any ingress traffic that conforms to the maximum rate specified in the child policer.

Task ID

Task ID

Operations

qos

read, write

Examples

This example shows parent and child policy maps in which two classes are defined in the child policy. In class AF1, the exceed action is set to an action other than to drop traffic.

If the child-conform-aware command were not configured in the parent policy, the parent policer would drop traffic that matches the conform rate of the child policer but exceeds the conform rate of the parent policer.

The child-conform-aware command prevents the parent policer from dropping any ingress traffic that conforms to the maximum rate specified in the child policer.

RP/0/0/CPU0:router(config)# policy-map parent
RP/0/0/CPU0:router(config-pmap)# class class-default
RP/0/0/CPU0:router(config-pmap-c)# service-policy child
RP/0/0/CPU0:router(config-pmap-c)# police rate percent 50
RP/0/0/CPU0:router(config-pmap-c-police)# child-conform-aware
RP/0/0/CPU0:router(config-pmap-c-police)# conform-action transmit
RP/0/0/CPU0:router(config-pmap-c-police)# exceed-action drop

RP/0/0/CPU0:router(config)# policy-map child
RP/0/0/CPU0:router(config-pmap)# class EF
RP/0/0/CPU0:router(config-pmap-c)# police rate 1 mbps
RP/0/0/CPU0:router(config-pmap-c-police)# conform-action set mpls experimental imposition 4
RP/0/0/CPU0:router(config-pmap-c-police)# exceed-action drop
RP/0/0/CPU0:router(config-pmap-c-police)# exit
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# class AF1
RP/0/0/CPU0:router(config-pmap-c)# police rate percent 50
RP/0/0/CPU0:router(config-pmap-c-police)# conform-action set mpls experimental imposition 3
RP/0/0/CPU0:router(config-pmap-c-police)# conform-action set mpls experimental imposition 2

Related Commands

Command

Description

exceed-action

Configures the action to take on packets that exceed the rate limit.  

police rate

Configures traffic policing and enters policy map police configuration mode.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

class (policy-map)

To specify the name of the class whose policy you want to create or change, use the class command in policy map configuration mode. To remove a class from the policy map, use the no form of this command.

class [ type qos ] { class-name | class-default }

no class [ type qos ] { class-name | class-default }

Syntax Description

type qos

(Optional) Specifies a quality-of-service (QoS) class.

class-name

Name of the class for which you want to configure or modify policy.

class-default

Configures the default class.

Command Default

No class is specified.

Type is QoS when not specified.

Command Modes

Policy map configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.6.0

The type qos keywords were added.

Usage Guidelines

You must be in a user group associated with a task group that includes the proper task IDs. The command reference guides include the task IDs required for each command. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Policy Map Configuration Mode

Within a policy map, the class (policy-map) command can be used to specify the name of the class whose policy you want to create or change. The policy map must be identified first.

To identify the policy map (and enter the required policy map configuration mode), use the policy-map command before you use the class (policy-map) command. After you specify a policy map, you can configure the policy for new classes or modify the policy for any existing classes in that policy map.

Class Characteristics

The class name that you specify in the policy map ties the characteristics for that class—that is, its policy—to the class map and its match criteria, as configured using the class-map command.

The class-default keyword is used for configuring default classes. It is a reserved name and cannot be used with user-defined classes. It is always added to the policy map (type qos) even if the class is not configured. For example, the following configuration shows that the class has not been configured, but the running configuration shows ‘class class-default’.

RP/0/0/CPU0:router(config)# policy-map pm1 
RP/0/0/CPU0:router(config-pmap)# end-policy-map 
RP/0/0/CPU0:router(config)# end 
!
RP/0/0/CPU0:router# show running-config 
!
policy-map pm1
 class class-default
 !        
 end-policy-map
!
  

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to create a policy map called policy1, which is defined to shape class1 traffic at 30 percent and default class traffic at 20 percent.

RP/0/0/CPU0:router(config)# class-map class1
RP/0/0/CPU0:router(config-cmap)# match precedence ipv4 3
!
RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:routerconfig-pmap-c)# shape average percent 30
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# class class-default
RP/0/0/CPU0:router(config-pmap-c)# shape average percent 20
  

The default class is used for packets that do not satisfy configured match criteria for class1. Class1 must be defined before it can be used in policy1, but the default class can be directly used in a policy map, as the system defines it implicitly.

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

class-map

To define a traffic class and the associated rules that match packets to the class, use the class-map command in global configuration mode. To remove an existing class map from the router, use the no form of this command.

class-map [ type qos ] [match-all] [match-any] class-map-name

no class-map [ type qos ] [match-all] [match-any] class-map-name

Syntax Description

type qos

(Optional) Specifies a quality-of-service (QoS) class-map.

match-all

(Optional) Specifies a match on all of the match criteria.

match-any

(Optional) Specifies a match on any of the match criteria. This is the default.

class-map-name

Name of the class for the class map. The class name is used for the class map and to configure policy for the class in the policy map. The class name can be a maximum of 63 characters, must start with an alphanumeric character, and in addition to alphanumeric characters, can contain any of the following characters: . _ @ $ % + | # : ; - =

Command Default

Type is QoS when not specified.

Command Modes

Global configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.6.0

The type qos keywords were added.

Release 3.7.0

Support was added for the character ‘=’ in the class-map-name argument. The argument accepts a maximum of 63 characters.

Usage Guidelines

You must be in a user group associated with a task group that includes the proper task IDs. The command reference guides include the task IDs required for each command. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The class-map command specifies the name of the class for which you want to create or modify class map match criteria. Use of this command enables class map configuration mode in which you can enter any match command to configure the match criteria for this class. Packets arriving on the interface are checked against the match criteria configured for a class map to determine if the packet belongs to that class.

The following commands can be used in a class map:

  • match access-group
  • match atm
  • match [not] cos
  • match destination-address
  • match [not] discard-class
  • match [not] dscp
  • match frame-relay dlci
  • match [not] mpls experimental topmost
  • match [not] precedence
  • match precedence
  • match [not] protocol
  • match [not] qos-group
  • match source-address
  • match vlan
  • match vpls

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to specify class101 as the name of a class and defines a class map for this class. The packets that match the access list 101 are matched to class class101.

RP/0/0/CPU0:router(config)# class-map class101
RP/0/0/CPU0:router(config-cmap)# match access-group ipv4 101

Related Commands

Command

Description

class (policy-map)

Specifies the name of the class whose policy you want to create or change.  

match access-group

Identifies a specified access control list (ACL) number as the match criteria for a class map.  

match atm

Enables packet matching on the basis of the ATM operations, administration, and maintenance (OAM) or cell loss priority (CLP).  

match cos

Identifies specified class of service (CoS) values as a match criteria in a class map.  

match dscp

Identifies specific IP differentiated services code point (DSCP) values as match criteria for a class map.  

match mpls experimental topmost

Identifies specific three-bit experimental (EXP) field values in the topmost Multiprotocol Label Switching (MPLS) label as match criteria for a class map.  

match precedence

Identifies IP precedence values as match criteria.  

match qos-group

Identifies specific quality-of-service (QoS) group values as match criteria in a class map.  

match source-address

Identifies a specific source MAC address as match criterion in a class map.  

match vlan

Identifies selected VLAN IDs as the match criteria for a class map.  

match vpls

Identifies selected virtual private LAN service (VPLS) fields as the match criteria for a class map.  

clear qos counters interface

To clear QoS counters for a specified interface, use the clear qos counters interface command in EXEC mode.

clear qos counters interface type interface-path-id [ input | output ]

Syntax Description

type

Interface type. For more information, use the question mark (?) online help function.

interface-path-id

Either a physical interface instance or a virtual interface instance as follows:

  • Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.
    • rack : Chassis number of the rack.
    • slot : Physical slot number of the modular services card or line card.
    • module : Module number. A physical layer interface module (PLIM) is always 0.
    • port : Physical port number of the interface.
    Note   

    In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RSP0RP0 or RP1) and the module is CPU0. Example: interface MgmtEth0/RSP0RP1/CPU0/0.

  • Virtual interface instance. Number range varies depending on interface type.

For more information about the syntax for the router, use the question mark (?) online help function.

input

(Optional) Clears input QoS counters that are attached to the specified interface.

output

(Optional) Clears output QoS counters that are attached to the specified interface.

Command Default

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.9.0

The interface keyword was added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The clear qos counters interface command clears all input and output QoS counters that are attached to a specified interface, unless the input or output keyword is specified. If the input or output keyword is specified, only counters attached to the interface in a specified direction are cleared.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to clear QoS counters attached to Gigabit Ethernet interface 0/1/0/9:

RP/0/0/CPU0:router# clear qos counters interface gigabitethernet 0/1/0/9

The following example shows how to clear output QoS counters attached to POS interface 0/7/0/3:

RP/0/0/CPU0:router# clear qos counters interface pos 0/7/0/3 output

compress header ip

To enable IP header compression for a policy map class, use the compress header ip command in policy map class configuration mode. To disable header compression, use the no form of this command.

compress header ip

no compress header ip

Syntax Description

This command has no keywords or arguments.

Command Default

By default, IP header compression is disabled.

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 4.0.0

This command was introduced.

Usage Guidelines

You must be in a user group associated with a task group that includes the proper task IDs. The command reference guides include the task IDs required for each command. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to enable IP header compression for a policy map class:

RP/0/0/CPU0:router(config)#class-map class1
RP/0/0/CPU0:router(config-cmap)# match access-group ipv4 customer1
RP/0/0/CPU0:router(config-cmap)# exit
RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# compress header ip
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

service-policy (interface)

Attachs a policy map to an input interface or output interface to be used as the service policy for that interface.  

conform-action

To configure the action to take on packets that conform to the rate limit, use the conform-action command in policy map police configuration mode. To remove a conform action from the policy-map, use the no form of this command.

conform-action [ drop | set options | transmit ]

no conform-action [ drop | set options | transmit ]

Syntax Description

drop

(Optional) Drops the packet.

set options

(Optional) Configures the specified packet properties. Replace options with one of the following keywords or keyword arguments:

  • atm-clp value —Sets the cell loss priority (CLP) bit.
  • cos value —Sets the class of service value. Range is 0 to7.
  • cos [inner]value —Sets the class of service value. Range is 0 to 7.
  • dei—Sets the drop eligible indicator (DEI). Can be 0 or 1.
  • discard-class value —Sets the discard class value. Range is 0 to 7.
  • dscp value —Sets the differentiated services code point (DSCP) value and sends the packet. See Table 1 for a list of valid values.
  • dscp [tunnel] value —Sets the differentiated services code point (DSCP) value and sends the packet. See Table 1 for a list of valid values. With the tunnel keyword, the DSCP is set in the outer header.
  • mpls experimental {topmost | imposition} value —Sets the experimental (EXP) value of the Multiprotocol Label Switching (MPLS) packet topmost label or imposed label. Range is 0 to 7.
  • precedence precedence —Sets the IP precedence and sends the packet See Table 2 for a list of valid values.
  • precedence [tunnel] precedence —Sets the IP precedence and sends the packet. See Table 1 for a list of valid values. With the tunnel keyword, the precedence is set in the outer header.
  • qos-group value —Sets the QoS group value.
  • srp-priority value —Sets the Spatial Reuse Protocol (SRP) priority. Range is 0 to 7.

transmit

(Optional) Transmits the packets.

Command Default

By default, if no action is configured on a packet that conforms to the rate limit, the packet is transmitted.

Command Modes

Policy map police configuration

Command History

Release

Modification

Release 3.4.0

This command was introduced.

Release 3.4.1

The set qos-group keyword was added.

Release 3.7.0

Multi-action policer set action for the conform-action command was added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

For more information regarding the traffic policing feature, see the police rate command.

The conform-action command can be used to set values for MPLS packets in the ingress direction. The values can be set in the following combinations:

  • experimental, qos-group, and discard class values, or
  • experimental and qos-group values, or
  • experimental and discard class values

Note


The multi-action policer sets cannot be used for IP packets.


  • Ingress and egress
  • Layer 2 subinterfaces
  • Layer 2 main interfaces
  • Layer 3 main interfaces

Task ID

Task ID

Operations

qos

read, write

Examples

In the following example for MPLS, traffic policing is configured to set the MPLS experimental bit for packets that conform to the rate limit:

RP/0/0/CPU0:router(config)# class-map class
RP/0/0/CPU0:router(config-cmap)# match mpls experimental topmost 0
RP/0/0/CPU0:router(config-cmap)# exit

RP/0/0/CPU0:router(config)# policy-map child
RP/0/0/CPU0:router(config-pmap)# class prec1
RP/0/0/CPU0:router(config-pmap-c)# police rate 100000000 peak-rate 3125000 peak-burst 3125000 
RP/0/0/CPU0:router(config-pmap-c-police)# conform-action set mpls experimental imp 1
RP/0/0/CPU0:router(config-pmap-c-police)# conform-action set qos-group 1
RP/0/0/CPU0:router(config-pmap-c-police)# exit
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit

RP/0/0/CPU0:router(config)# interface gigabitethernet 0/1/0/9
RP/0/0/CPU0:router(config-if) service-policy input policy1

Related Commands

Command

Description

child-conform-aware

Prevents the parent policer from dropping any ingress traffic that conforms to the maximum rate specified in the child policer.  

conform-color

(Used for SIP 700 cards only.) Configures preclassification of ingress Layer 2 Frame Relay packets that have been previously marked as not discard eligible on an upstream node. These previously-marked packets are analyzed and preclassified by the color-aware policer on the ingress interface as part of the 2-rate 3-color (2R3C) traffic policing feature.  

exceed-action

Configures the action to take on packets that exceed the rate limit.  

police rate

Configures traffic policing and enters policy map police configuration mode.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

violate-action

Configures the action to take on packets that violate the rate limit.  

end-class-map

To end the configuration of match criteria for the class and to exit class map configuration mode, use the end-class-map command in class map configuration mode.

end-class-map

Syntax Description

This command has no keywords or arguments.

Command Default

No default behavior or values

Command Modes

Class map configuration

Command History

Release

Modification

Release 3.6.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to end the class map configuration and exit class map configuration mode:

RP/0/0/CPU0:router(config)# class-map class101
RP/0/0/CPU0:router(config-cmap)# match access-group ipv4 101
RP/0/0/CPU0:router(config-cmap)# end-class-map 
RP/0/0/CPU0:router(config)# 

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

end-policy-map

To end the configuration of a policy map and to exit policy map configuration mode, use the end-policy-map command in policy map configuration mode.

end-policy-map

Syntax Description

This command has no keywords or arguments.

Command Default

No default behavior or values

Command Modes

Policy map configuration

Command History

Release

Modification

Release 3.6.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to end the policy map configuration and exit policy map configuration mode.

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# police
 cir

 250
RP/0/0/CPU0:router(config-pmap-c)# set precedence 3
RP/0/0/CPU0:router(config-pmap)# end-policy-map 
RP/0/0/CPU0:router(config)#

Related Commands

Command

Description

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

exceed-action

To configure the action to take on packets that exceed the rate limit, use the exceed-action command in policy map police configuration mode. To remove an exceed action from the policy-map, use the no form of this command.

exceed-action [ drop | set options | transmit ]

no exceed-action [ drop | set options | transmit ]

Syntax Description

drop

(Optional) Drops the packet.

set options

Configures the specified packet properties. Replace options with one of the following keywords or keyword arguments:

  • atm-clp value —Sets the cell loss priority (CLP) bit.
  • cos [inner] value —Sets the class of service value. Range is 0 to 7.
  • cos value —Sets the class of service value. Range is 0 to 7.
  • dei —Sets the drop eligible indicator (DEI). Can be 0 or 1.
  • discard-class value —Sets the discard class value. Range is 0 to 7.
  • dscp value —Sets the differentiated services code point (DSCP) value and sends the packet. See Table 1 for a list of valid values.
  • dscp [tunnel] value —Sets the differentiated services code point (DSCP) value and sends the packet. See Table 1 for a list of valid values. With the tunnel keyword, the DSCP is set in the outer header.
  • fr-de value —Sets the Frame Relay discard eligible (DE) bit on the Frame Relay frame then transmits that packet. In congested environments, frames with the DE bit set to 1 are discarded before frames with the DE bit set to 0. The frame relay DE bit has only one bit and has only two settings, 0 or 1. The default DE bit setting is 0.
  • mpls experimental {topmost | imposition} value —Sets the experimental (EXP) value of the Multiprotocol Label Switching (MPLS) packet topmost label or imposed label. Range is 0 to 7.
  • precedence precedence —Sets the IP precedence and sends the packet. See Table 1 for a list of valid values.
  • precedence [tunnel] precedence —Sets the IP precedence and sends the packet. See Table 1 for a list of valid values. With the tunnel keyword, the precedence is set in the outer header.
  • qos-group value —Sets the QoS group value.
  • qos-group value —Sets the QoS group value. Range is 0 to 63.
  • srp-priority value —Sets the Spatial Reuse Protocol (SRP) priority. Range is 0 to 7

transmit

(Optional) Transmits the packets.

Command Default

By default, if no action is configured on a packet that exceeds the rate limit, the packet is dropped.

Command Modes

Policy map police configuration

Command History

Release

Modification

Release 3.4.0

This command was introduced.

Release 3.4.1

The set qos-group keyword was added.

Release 3.7.0

Multi-action policer set action for the exceed-action command was supported.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

For more information regarding the traffic policing feature, see the police rate command.

The exceed-action command can be used to set values for MPLS packets in the following combinations:

  • experimental, qos-group, and discard class values, or
  • experimental and qos-group values, or
  • experimental and discard class values

Note


The multi-action policer sets cannot be used for IP packets.


  • Ingress and egress
  • Layer 2 subinterfaces
  • Layer 2 main interfaces
  • Layer 3 main interfaces

Task ID

Task ID

Operations

qos

read, write

Examples

In the following example for MPLS, traffic policing is configured to drop traffic that exceeds the rate limit:

RP/0/0/CPU0:router(config)# class-map class1
RP/0/0/CPU0:router(config-cmap)# match mpls experimental topmost 0
RP/0/0/CPU0:router(config-cmap)# exit

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# police rate 250 kbps burst 50
RP/0/0/CPU0:router(config-pmap-c-police)# exceed-action drop
RP/0/0/CPU0:router(config-pmap-c-police)# exit
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit

RP/0/0/CPU0:router(config)# interface pos 0/5/0/0
RP/0/0/CPU0:router(config-if) service-policy input policy1

Related Commands

Command

Description

conform-action

Configures the action to take on packets that conform to the rate limit.  

exceed-color

(Used for SIP 700 cards only.) Configures preclassification of ingress Layer 2 Frame Relay packets that have been previously marked as discard eligible on an upstream node. These previously-marked packets are analyzed and preclassified by the color-aware policer on the ingress interface as part of the 2-rate 3-color (2R3C) traffic policing feature.  

police rate

Configures traffic policing and enters policy map police configuration mode.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

violate-action

Configures the action to take on packets that violate the rate limit.  

hw-module mrq-polling

To configure the threshold values for polling of MRQ counters, use the hw-module mrq-polling command in global configuration mode. To revert to the default threshold values for MRQ polling, use the no form of this command.

hw-module mrq-polling { max-threshold | min-threshold } threshold value location node-id

no hw-module mrq-polling { max-threshold | min-threshold } threshold value location node-id

Syntax Description

max-threshold

Configures the maximum threshold value for the polling of MRQ counters.

min-threshold

Configures the minimum threshold value for the polling of MRQ counters.

threshold value

Threshold value. For Multirate 10G IP Services Engines (Engine 5+) line cards, range is 1 to 16384. For 2.5 Gbps IP Services Engine (Engine 3) line cards, range is 1 to 2048.

location

Configures threshold values for MRQ polling, for a designated node.

node-id

Location of node to be configured. The node-id argument is entered in the rack/slot/module notation.

Command Default

The default minimum threshold is 25 percent of the available MRQ counters, 4096 for Engine 5+ line cards, 512 for Engine 3 line cards. The default maximum threshold is 75 percent of the available MRQ counters, 12288 for Engine 5+ line cards, 1536 for Engine 3 line cards.

Command Modes

Global configuration mode

Command History

Release

Modification

Release 4.0.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

This command is supported on 2.5 Gbps IP Services Engine (Engine 3) line cards and Multirate 10G IP Services Engines (Engine 5+) line cards.

The maximum threshold value should always exceed the minimum threshold value. Attempting to commit a configuration with threshold values which do not meet this criteria will result in an error.

Task ID

Task ID

Operation

drivers

read, write

root-lr

read, write

Examples

The following example demonstrates how to configure the maximum threshold value for MRQ polling as 2000, at location 0/2/CPU0:

RP/0/0/CPU0:router# configure terminal
Wed Aug 11 01:21:51.378 UTC
RP/0/0/CPU0:router(config)# 
RP/0/0/CPU0:router(config)# hw-module mrq-polling max-threshold 2000 location 0/2/CPU0
RP/0/0/CPU0:router(config)# commit
RP/0/0/CPU0:router : config[65809]: %MGBL-CONFIG-6-DB_COMMIT : Configuration committed by user 'root'. Use 'show configuration commit changes 1000000015' to view the changes. 
RP/0/0/CPU0:router(config)# 

The following example demonstrates how to configure the default maximum threshold value for MRQ polling, at location 0/2/CPU0:

RP/0/0/CPU0:router# configure terminal
Wed Aug 11 01:21:51.378 UTC
RP/0/0/CPU0:router(config)# 
RP/0/0/CPU0:router(config)# no hw-module mrq-polling max-threshold 2000 location 0/2/CPU0
RP/0/0/CPU0:router(config)# commit
RP/0/0/CPU0:router : config[65809]: %MGBL-CONFIG-6-DB_COMMIT : Configuration committed by user 'root'. Use 'show configuration commit changes 1000000016' to view the changes. 
RP/0/0/CPU0:router(config)# 

hw-module qos acc-l2-with-additional

To account Layer 2 with additional bytes, use the hw-module qos acc-l2-with-additional command in global configuration mode. To account Layer 2 without additional bytes, use the no form of this command.

hw-module qos acc-l2-with-additional number of bytes location node-id

no hw-module qos acc-l2-with-additional number of bytes location node-id

Syntax Description

number of bytes

Number of additional bytes to be used for Layer 2 accounting.

location

Configures additional Layer 2 bytes for the designated node.

node-id

Location of node to be configured. The node-id argument is entered in the rack/slot/module notation.

Command Default

No additional bytes are used in Layer 2 accounting.

Command Modes

Global configuration mode

Command History

Release

Modification

Release 4.0.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

This command is supported on 10 Gbps IP Services Engine (Engine 5) line cards and Multirate 10G IP Services Engines (Engine 5+) line cards only.

Layer 2 accounting must be enabled on the location specified at node-id. The specified interface must not be configured using the service-policy (interface) command with the optional account nolayer2 keyword, as this disables Layer 2 accounting of the specified interface and enables Layer 3 accounting only.

This command configures all interfaces on the specified node to account Layer 2 using the specfified number of additional bytes.

Task ID

Task ID

Operation

qos

read, write

root-lr

read, write

Examples

The following example demonstrates how to configure Layer 2 accounting to use an additional 4 bytes, at location 0/2/CPU0:

RP/0/0/CPU0:router# configure terminal
RP/0/0/CPU0:router (config)# hw-module qos acc-l2-with-additional 4 location 0/2/CPU0
RP/0/0/CPU0:router (config)#

Related Commands

Command

Description

hw-module qos account layer2 encapsulation

Configures Layer 2 encapsulation header lengths on a node.  

service-policy (interface)

Attachs a policy map to an input interface or output interface to be used as the service policy for that interface.  

hw-module qos account layer2 encapsulation

To configure Layer 2 encapsulation header lengths on a node, use the hw-module qos account layer2 encapsulation command in global configuration mode. To disable this functionality, use the no form of this command.

hw-module qos account layer2 encapsulation { arpa | dot1q | length value } location node-id

no hw-module qos account layer2 encapsulation { arpa | dot1q | length value } location node-id

Syntax Description

arpa

Specifies the ARPA encapsulation size (14 bytes).

dot1q

Specifies the EEE 802.1q encapsulation size (18 bytes).

length value

Specifies the Layer 2 encapsulation length in bytes. Range is 1-50.

location node-id

Enables Layer 2 encapsulation header lengths for the designated node. The node-id argument is entered in the rack/slot/module notation.

Command Default

No default behavior or values

Command Modes

Global configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The default packet size for QoS accounting on 2.5 Gbps IP Services Engine (Engine 3) line cards is Layer 3 packet size. This command allows you to specify Layer 2 packet size for QoS accounting and to specify its length, which allows service providers to limit the amount of traffic that is passed to particular users.

This command applies only to the 4-Port Gigabit Ethernet ISE line card. If enabled, this command applies to all interfaces on the 4-port Gigabit Ethernet ISE line card. Ingress QoS traffic uses the actual Layer 2 encapsulation size of each packet. For example, if packets come from a dot1q interface the encapsulation size is 18 bytes. If packets come from a QinQ interface, the encapsulation size is 22 bytes. Egress QoS traffic uses the encapusulation size specified in this command regardless of the egress interface type.

Task ID

Task ID

Operations

qos

read, write

root-lr

read, write

Examples

The following example shows how to configure Layer 2 encapsulation header lengths to 25 on 0/1/CPU0:

RP/0/0/CPU0:router# configure
RP/0/0/CPU0:router(config)# hw-module qos account layer2 encapsulation length 25 0/1/CPU0

Related Commands

Command

Description

hw-module qos multicast

Enables multicast egress quality of service (QoS) on a node.  

hw-module qos queue-auto-defrag disable location

Disables automatic QoS queue defragmentation on a node.  

show hw-module multicast qos

Displays the multicast QoS group information.  

hw-module qos acl-deny enable

To deny access control lists (ACL) on a node, use the hw-module qos acl-deny enable command in global configuration mode. To disable this functionality, use the no form of this command.

hw-module qos acl-deny enable [ location node-id ]

no hw-module qos acl-deny enable [ location node-id ]

Syntax Description

location node-id

Denies ACLs for the designated node. The node-id argument is entered in the rack/slot/module notation.

Command Default

By default, this feature is disabled.

Command Modes

Global configuration

Command History

Release

Modification

Release 3.6.0

This command was introduced on the Cisco XR 12000 Series Router.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

For the hw-module qos acl-deny enable command to run effectively, you must reload the line card (LC).

Task ID

Task ID

Operations

qos-ea

write

Examples

The following example shows how to configure an acl-deny function on location 0/1/CPU0:

RP/0/0/CPU0:router# configure
RP/0/0/CPU0:router(config)# hw-mod qos acl-deny enable location 0/1/CPU0

Related Commands

Command

Description

show qos acl-deny enable

Displays the acl-deny information for a particular location.  

hw-module qos if-ref-bw

To enable the interface bandwidth as the Quality of Service (QoS) reference bandwidth, use the hw-module qos if-ref-bw command in global configuration mode. To revert to the default configuration, use the no form of this command.

hw-module qos if-ref-bw enable location node-id

no hw-module qos if-ref-bw enable location node-id

Syntax Description

enable

Enables interface bandwidth as the QoS reference bandwidth.

location

Configures node for which the QoS reference bandwidth is to be defined.

node-id

Node for which the QoS reference bandwidth is to be defined. The node-id argument is entered in the rack/slot/module notation.

Command Default

The class service rate is the default reference bandwidth.

Command Modes

Global configuration mode

Command History

Release

Modification

Release 4.0.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

New configuration will only take effect after a line card reload.

The QoS reference bandwidth is used for the conversion of time based values to equivalent packet based interpretation.

Task ID

Task ID

Operation

qos

read, write

root-lr

read, write

Examples

The following example shows how to enable the interface bandwidth as the QoS reference bandwidth, on location 0/3/cpu0:

RP/0/0/CPU0:router(config)# hw-module qos if-ref-bw enable location 0/3/cpu0
RP/0/0/CPU0:router(config)# commit
RP/0/0/CPU0:router:Aug 9 02:41:43.952 : qos_ea[238]: %QOS-QOSEA-6-INFO : QoSEA-Info: if-ref-bw config accepted, reload LC to take effect. 
RP/0/0/CPU0:router:Aug 9 02:41:44.537 : config[65809]: %MGBL-CONFIG-6-DB_COMMIT : Configuration committed by user 'root'. Use 'show configuration commit changes 1000000012' to view the changes. 
RP/0/0/CPU0:router(config)#

The following example shows how to enable the class service rate as the QoS reference bandwidth, on location 0/3/cpu0:

RP/0/0/CPU0:router(config)# no hw-module qos if-ref-bw enable location 0/3/cpu0
RP/0/0/CPU0:router(config)# commit
RP/0/0/CPU0:router:Aug 9 02:41:58.168 : qos_ea[238]: %QOS-QOSEA-6-INFO : QoSEA-Info: if-ref-bw config accepted, reload LC to take effect. 
RP/0/0/CPU0:router:Aug 9 02:41:58.669 : config[65809]: %MGBL-CONFIG-6-DB_COMMIT : Configuration committed by user 'root'. Use 'show configuration commit changes 1000000013' to view the changes. 
RP/0/0/CPU0:router(config)#

Related Commands

Command

Description

show qos if-ref-bw

Displays the Quality of Service (QoS) reference bandwidth.  

hw-module qos multicast

To enable multicast egress quality of service (QoS) on a node, use the hw-module qos multicast command in global configuration mode. To disable this functionality, use the no form of this command.

hw-module qos multicast [ location node-id ]

no hw-module qos multicast [ location node-id ]

Syntax Description

location node-id

Enables egress QoS for the designated node. The node-id argument is entered in the rack/slot/module notation.

Command Default

All multicast traffic is routed through the default queue.

Command Modes

Global configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Release 3.4.0

The enable keyword was deleted from the command syntax.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The hw-module qos multicast command enables multicast QoS, which means that general, system wide QoS applies to multicast traffic as well.


Note


The following commands apply to Cisco XR 12000 Series Router Engine 3 line cards only: hw-module qos multicast , hw-module qos multicast priorityq , and show hw-module qos multicast . For Engine 5 line cards, there is no requirement for a command to enable QoS. On Engine 5 line cards, multicast QoS behaves like unicast QoS (when a policy is attached to an interface).


If multicast QoS is disabled (which is the default value), all multicast traffic travels to the default queue. When multicast routes are configured with QoS enabled, there may be insufficient resources (PLU/TLU, MGIDs, and so on.) to support multicast QoS for all routes. In such cases, some multicast routes are unchanged and associated multicast traffic is routed to the default queue.

For complete information about QoS in Cisco IOS XR software, see the Cisco IOS XR Modular Quality of Service Configuration Guide.

Task ID

Task ID

Operations

qos

read, write

root-lr

read, write

Examples

The following example shows how to enable multicast QoS on location 0/1/CPU0:

RP/0/0/CPU0:router# configure
RP/0/0/CPU0:router(config)# hw-module qos multicast location 0/1/CPU0

Related Commands

Command

Description

show hw-module multicast qos

Displays the multicast QoS group information.  

hw-module qos multicast priorityq disable

To divert multicast traffic slated for the priority queue to the default queue, use the hw-module qos multicast priorityq disable command in global configuration mode. To disable this functionality, use the no form of this command.

hw-module qos multicast priorityq disable location node-id

no hw-module qos multicast priorityq disable location node-id

Syntax Description

location node-id

Assigns a QoS priority value for the designated node. The node-id argument is entered in the rack/slot/module notation.

Command Default

By default, all multicast traffic is routed to the priority queue (as defined by the QoS policy).

Command Modes

Global configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.


Note


The following commands apply to Engine 3 line cards only: hw-module qos multicast , hw-module qos multicast priorityq disable , and show hw-module qos multicast . For Engine 5 line cards, there is no requirement for a command to enable QoS. On Engine 5 line cards, multicast QoS behaves like unicast QoS (when a policy is attached to an interface).


For complete information about QoS in Cisco IOS XR software, see the Cisco IOS XR Modular Quality of Service Configuration Guide.

Task ID

Task ID

Operations

qos

read, write

root-lr

read, write

Examples

The following example shows how to divert multicast traffic slated for the priority queue to the default queue on 0/1/CPU0:

RP/0/0/CPU0:router# hw-module qos multicast priorityq disable 0/1/CPU0

Related Commands

Command

Description

hw-module qos multicast

Enables multicast egress quality of service (QoS) on a node.  

show hw-module multicast qos

Displays the multicast QoS group information.  

hw-module qos pol-gran location

To override the default policer granularity, use the hw-module qos pol-gran location command in global configuration mode. To return to the default policer granularity, use the no form of this command.

hw-module qos pol-gran granularity location interface-path-id

no hw-module qos pol-gran granularity location interface-path-id

Syntax Description

granularity

Policer granularity in kbps. Valid values are from 8 kbps to 64 kbps.

interface-path-id

Physical location of the Shared Interface Processor (SIP). Naming notation is rack/slot/module and a slash between values is required as part of the notation.

  • rack —Chassis number of the rack.
  • slot —Physical slot number of the modular services card or line card.
  • module —Module number. A physical layer interface module (PLIM) is always 0.

Command Default

Default policer granularity values are:

  • Cisco 12000 SIP-401—64 kbps
  • Cisco 12000 SIP-501—64 kbps
  • Cisco 12000 SIP-601—64 kbps

Command Modes

Global configuration

Command History

Release

Modification

Release 3.8.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The police rate you set should be a multiple of the policer granularity. For example, if the police rate is set to 72 kbps but the default policer granularity is 64 kbps, the effective police rate is 64 kbps. To get an actual police rate of 72 kbps, configure the policer granularity to 8 kbps. Because 72 is a multiple of 8, the police rate will be exactly 72 kbps.

Policer granularity values, whether default or configured, apply to the SIP and to all SPAs that are installed on the SIP.

Task ID

Task ID

Operations

qos

read, write

root-lr

read, write

Examples

The following example shows how to set the policer granularity to 8 on location 0/1/CPU0:

RP/0/0/CPU0:router# configure
RP/0/0/CPU0:router(config)# hw-module qos pol-gran 8 location 0/1/CPU0

Related Commands

Command

Description

show qos pol-gran location

Displays policer granularity for a SPA Interface Processor.  

hw-module qos queue-auto-defrag disable location

To disable automatic QoS queue defragmentation on a node, use the hw-module qos queue-auto-defrag disable location command in global configuration mode. To disable this functionality, use the no form of this command.

hw-module qos queue-auto-defrag disable location node-id

no hw-module qos queue-auto-defrag disable location node-id

Syntax Description

node-id

Specifies the node in the rack/slot/module notation.

Command Default

No default behavior or values

Command Modes

Global configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Release 3.5.0

The enable keyword was removed.

Release 3.9.0

Added usage guidelines to refer to the hw-module queue-defrag location command for information on manually defragmenting QoS queues.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

When policies are frequently added and removed in large-scale configurations, the line card might not have enough free contiguous QoS queues to accommodate a new policy—even though there are enough free queues on the line card. Defragmentation solves this problem by moving the minimum number of queues to make all occupied queues contiguous.

There is the potential for packet loss during QoS queue defragmentation. However, if you disable automatic defragmentation, you could get an error while trying to applying a policy map because there are not enough queues available on the line card.

To avoid packet loss during defragmentation or running out of available queues, schedule a maintenance window and manually defragment the QoS queues using the hw-module queue-defrag location command.

Task ID

Task ID

Operations

qos

read, write

root-lr

read, write

Examples

The following example shows how to disable automatic QoS queue defragmentation on location 0/1/CPU0. Automatic defragmentation is disabled for all interfaces on location 0/1/CPU0.

RP/0/0/CPU0:router# configure
RP/0/0/CPU0:router(config)# hw-module qos queue-auto-defrag disable location 0/1/CPU0

Related Commands

Command

Description

hw-module qos account layer2 encapsulation

Configures Layer 2 encapsulation header lengths on a node.  

hw-module qos multicast

Enables multicast egress quality of service (QoS) on a node.  

hw-module queue-defrag location

Manually defragment the QoS queues on a node.  

show hw-module multicast qos

Displays the multicast QoS group information.  

hw-module queue-defrag location

To manually defragment the QoS queues on a node, use the hw-module queue-defrag location command in EXEC mode.

hw-module queue-defrag location node-id

Syntax Description

node-id

Specifies the node in the rack/slot/module notation.

Command Default

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

When policies are frequently added and removed in large-scale configurations, the line card might not have enough free contiguous QoS queues to accommodate a new policy—even though there are enough free queues on the line card. Defragmentation solves this problem by moving the minimum number of queues to make all occupied queues contiguous.

You can manually defragment the QoS queues on a node regardless of whether automatic defragmentation is enabled. If automatic defragmentation is disabled, you could get an error while trying to applying a policy map because there are not enough free contiguous queues available on the line card. In this case, use the hw-module queue-defrag location command to defragment the queues on the node.

To determine the number of occupied QoS queues and the level of fragmentation on a node, use the show controllers egressq enaq location command.

Task ID

Task ID

Operations

sysmgr

execute

root-lr

read

Examples

The following example shows how to manually defragment QoS queues on location 0/1/CPU0. QoS queues are defragmented for all the interfaces on location 0/1/CPU0.

RP/0/0/CPU0:router# hw-module queue-defrag location 0/1/CPU0

Related Commands

Command

Description

hw-module qos queue-auto-defrag disable location

Disables automatic QoS queue defragmentation on a node.  

show controllers egressq enaq location

Displays information about QoS queue fragmentation on a node, use the show controllers egressq enaq location command in EXEC mode.  

hw-module sanity

To configure sanity checking of ingress and egress queueing ASICs, use the hw-module sanity command in global configuration mode. To revert to the default sanity checking configuration, use the no form of this command.

hw-module sanity { egressq | ingressq } { action action | threshold threshold-value | timer seconds } location node-id

no hw-module sanity { egressq | ingressq } { action action | threshold threshold-value | timer seconds } location node-id

Syntax Description

egressq

Configures sanity checking of egress queueing ASIC.

ingressq

Configures sanity checking of ingress queuing ASIC.

action

Configures action performed when buffer has depleted completely.

action

Action to be performed when buffer has depleted completely. Valid values are

  • recarve—Recarve performed as recovery.
  • none—No action performed as recovery.
  • reload—Reload of line card performed as recovery.

threshold

Configures remaining buffer threshold value. Warning printed on the console when the remaining buffer threshold value is reached.

threshold-value

Buffer threshold value, as a percentage. Range: 1 to 100.

timer

Configures time lapse between successive sanity checks.

seconds

Time lapse between successive sanity checks, in seconds.

location

Configures sanity checking for a designated node.

node-id

Node for which sanity checking is to be configured. The node-id argument is entered in the rack/slot/module notation.

Command Default

Action: pcds. Threshold: 5. Timer: 60

Command Modes

Global configuration mode

Command History

Release

Modification

Release 4.0.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

This command is supported on 10 Gbps IP Services Engine (Engine 5) line cards and Multirate 10G IP Services Engines (Engine 5+) line cards only.

Use of the no form of this command, with the keyword action , configures the action as none. The default action, pcds, is equivalent to the user configurable action, none. When action is set as pcds or none, a warning is printed on the console when the buffer threshold value is reached, but no action is performed as recovery when the buffer has depleted completely.

Task ID

Task ID

Operation

drivers

read, write

root-lr

read, write

Examples

The following example shows how to configure sanity checking of the ingress queuing ASIC at 30 second intervals on location 0/2/CPU0, to print a warning on the console when the buffer has depleted to 7 percent and to perform a line card reload when the buffer has depleted completely.

RP/0/0/CPU0:router# configure terminal
RP/0/0/CPU0:router(config)# hw-module sanity ingressq timer 30 location 0/2/CPU0
RP/0/0/CPU0:router(config)# hw-module sanity ingressq action reload location 0/2/CPU0
RP/0/0/CPU0:router(config)# hw-module sanity ingressq threshold 7 location 0/2/CPU0
RP/0/0/CPU0:router(config)#

Related Commands

Command

Description

show controllers sanity

Displays information about sanity checking of ingress and egress queueing ASICs.  

match access-group

To identify a specified access control list (ACL) number as the match criteria for a class map, use the match access-group command in class map configuration mode. To remove ACL match criteria from a class map, use the no form of this command.

match access-group { ipv4 | ipv6 } access-group-name

no match access-group { ipv4 | ipv6 } access-group-name

Syntax Description

ipv4

Specifies the name of the IPv4 access group to be matched.

ipv6

Specifies the name of the IPv6 access group to be matched.

access-group-name

ACL whose contents are used as the match criteria against which packets are checked to determine if they belong to this class.

Command Default

By default, if neither IPv6 nor IPv4 is specified as the match criteria for a class map, IPv4 addressing is used.

Command Modes

Class map configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.2.2

Support for IPv6 ACLs with source port matching was added in MQC policy maps.

Release 3.3.0

No modification.

Release 3.3.1

Support for IPv4 ACLs with source port matching was added in MQC policy maps.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

For class-based features (such as marking, Modified Deficit Round Robin [MDRR], and policing), you define traffic classes based on match criteria, including ACLs and input interfaces. Packets satisfying the match criteria for a class constitute the traffic for that class.

The match access-group command specifies an ACL whose contents are used as the match criteria against which packets are checked to determine if they belong to the class specified by the class map.

To use the match access-group command, you must first enter the class-map command to specify the name of the class whose match criteria you want to establish. You can specify up to eight IPv4 and IPv6 ACLs in a match statement.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to specify a class map called map1 and configures map1 to be used as the match criteria for this class:

RP/0/0/CPU0:router(config)# class-map map1
RP/0/0/CPU0:router(config-cmap)# match access-group ipv4 map1

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

match atm

To enable packet matching on the basis of the ATM operations, administration, and maintenance (OAM) or cell loss priority (CLP), use the match atm command in class-map configuration mode. To disable packet matching, use the no form of this command.

match atm { clp [clp-bit-value] | oam }

no match atm { clp [clp-bit-value] | oam }

Syntax Description

clp

Configures the ATM CLP bit to be matched. Use either 0 or 1 for clp-bit-value .

clp-bit-value

(Optional) Value for the ATM CLP bit. Choose either 0 or 1 as the bit value. If you do not specify a bit value, the default value of 1 is used.

oam

Configures the ATM OAM to be matched.

Command Default

Packets are not matched on the basis of the ATM CLP or OAM.

Command Modes

Class map configuration

Command History

Release

Modification

Release 3.8.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The match atm command is supported on policy maps that are attached to ATM main interfaces, ATM subinterfaces, or ATM permanent virtual circuits (PVCs). However, policy maps (containing the match atm command) that are attached to these types of ATM interfaces can be input policy maps only.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to specify a class map called map1 and configures map1 to be used as the match criteria for this class:

RP/0/0/CPU0:router(config)#class-map map1
RP/0/0/CPU0:router(config-cmap)# match atm oam

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

match access-group

Identifies a specified access control list (ACL) number as the match criteria for a class map.  

match cos

Identifies specified class of service (CoS) values as a match criteria in a class map.  

match dscp

Identifies specific IP differentiated services code point (DSCP) values as match criteria for a class map.  

match mpls experimental topmost

Identifies specific three-bit experimental (EXP) field values in the topmost Multiprotocol Label Switching (MPLS) label as match criteria for a class map.  

match precedence

Identifies IP precedence values as match criteria.  

match qos-group

Identifies specific quality-of-service (QoS) group values as match criteria in a class map.  

match source-address

Identifies a specific source MAC address as match criterion in a class map.  

match vlan

Identifies selected VLAN IDs as the match criteria for a class map.  

match cos

To identify specified class of service (CoS) values as a match criteria in a class map, use the match cos command in class map configuration mode. To remove a specified CoS class value from the matching criteria for a class map, use the no form of this command.

match cos cos-value [ cos-value1 . .. cos-value7 ]

no match cos cos-value [ cos-value1 . .. cos-value7 ]

Syntax Description

cos-value

Class-of-service identifier that specifies the exact value from 0 to 7. Up to eight CoS identifiers can be specified to match packets.

Command Default

No match criteria are specified.

Command Modes

Class map configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The match cos command specifies a class of service that is used as the match criteria against which packets are checked to determine if they belong to the class specified by the class map.

To use the match cos command, you must first enter the class-map command to specify the name of the class whose match criteria you want to establish. If you specify more than one match cos command in a class map, the values of subsequent match statements are added to the first match cos command.

The match cos command is not supported on an output service policy attached to a Layer 3 interface (POS interface or routed VLAN subinterface).

The match cos command is supported on egress Layer 2 interfaces, Layer 2 subinterfaces, and Layer 3 physical interfaces. Layer 3 physical interfaces are supported, because it is possible for a Layer 3 interface to have underlying Layer 2 subinterfaces. This command is supported only on the ingress ethernet subinterface.

  • Ingress and egress
  • Layer 2 main interfaces and subinterfaces
  • Layer 3 main interfaces

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to configure the service policy called policy1 and attach service policy policy1 to an interface. In this example, class map cos146 evaluates all packets entering Gigabit Ethernet subinterface 0/1/0/0.100 for class of service values of 1, 4, or 6. If the incoming packet has been marked with any of these CoS values, the packet is queued to the class queue with the bandwidth setting of 300 kbps.

RP/0/0/CPU0:router(config)# class-map cos146
RP/0/0/CPU0:router(config-cmap)# match cos 1 4 6
RP/0/0/CPU0:router(config-cmap)# exit

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class cos146
RP/0/0/CPU0:router(config-pmap-c)# bandwidth 300
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit

RP/0/0/CPU0:router(config)# interface

 gigabitethernet 0/1/0/0.100
RP/0/0/CPU0:router(config-if)# service-policy

 output
 policy1

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

match access-group

Identifies a specified access control list (ACL) number as the match criteria for a class map.  

match atm

Enables packet matching on the basis of the ATM operations, administration, and maintenance (OAM) or cell loss priority (CLP).  

match dscp

Identifies specific IP differentiated services code point (DSCP) values as match criteria for a class map.  

match mpls experimental topmost

Identifies specific three-bit experimental (EXP) field values in the topmost Multiprotocol Label Switching (MPLS) label as match criteria for a class map.  

match precedence

Identifies IP precedence values as match criteria.  

match qos-group

Identifies specific quality-of-service (QoS) group values as match criteria in a class map.  

match source-address

Identifies a specific source MAC address as match criterion in a class map.  

match vlan

Identifies selected VLAN IDs as the match criteria for a class map.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

set cos

Sets the Layer 2 class of service (CoS) value of an outgoing packet.  

match dscp

To identify specific IP differentiated services code point (DSCP) values as match criteria for a class map, use the match dscp command in class map configuration mode. To remove a DSCP value from a class map, use the no form of this command.

match dscp [ ipv4 | ipv6 ] dscp-value [ dscp-value1 . .. dscp-value7 ]

no match dscp [ ipv4 | ipv6 ] dscp-value [ dscp-value1 . .. dscp-value7 ]

Syntax Description

ipv4

(Optional) Specifies the IPv4 DSCP value.

ipv6

(Optional) Specifies the IPv6 DSCP value.

dscp-value

IP DSCP value identifier that specifies the exact value or a range of values. Range is 0 to 63. Up to eight IP DSCP values can be specified to match packets. Reserved keywords can be specified instead of numeric values. Table 1 describes the reserved keywords.

Command Default

Matching on both IP Version 4 (IPv4) and IPv6 packets is the default.

Command Modes

Class map configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.3.0

The ipv6 and ipv4 keywords were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The match dscp command specifies a DSCP value that is used as the match criteria against which packets are checked to determine if they belong to the class specified by the class map.

To use the match dscp command, you must first enter the class-map command to specify the name of the class whose match criteria you want to establish. If you specify more than one match dscp command in a class map, only the last command entered applies.

The match dscp command examines the higher-order six bits in the type of service (ToS) byte of the IP header. Only one of the eight values is needed to yield a match (OR operation).

The command supports only eight IP DSCP values. If you try to configure more match statements after all the eight values are matched, the statements get rejected.

The IP DSCP value is used as a matching criterion only. The value has no mathematical significance. For instance, the IP DSCP value 2 is not greater than 1. The value simply indicates that a packet marked with the IP DSCP value of 2 should be treated differently than a packet marked with an IP DSCP value of 1. The treatment of these marked packets is defined by the user through the setting of QoS policies in policy map class configuration mode.

The reserved keywords listed in the following table can be specified instead of numeric values.

Table 1 IP DSCP Reserved Keywords

DSCP Value

Reserved Keyword

0

default

10

AF11

12

AF12

14

AF13

18

AF21

20

AF22

22

AF23

26

AF31

28

AF32

30

AF33

34

AF41

36

AF42

38

AF43

46

EF

8

CS1

16

CS2

24

CS3

32

CS4

40

CS5

48

CS6

56

CS7

ipv4

ipv4 dscp

ipv6

ipv6 dscp

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to configure the service policy called policy1 and attach service policy policy1 to an interface. In this example, class map dscp14 evaluates all packets entering Packet-over-SONET/SDH (POS) interface 0/1/0/0 for an IP DSCP value of 14. If the incoming packet has been marked with the IP DSCP value of 14, the packet is queued to the class queue with the bandwidth setting of 300 kbps.

RP/0/0/CPU0:router(config)# class-map dscp14
RP/0/0/CPU0:router(config-cmap)# match dscp ipv4 14
RP/0/0/CPU0:router(config-cmap)# exit

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class dscp14
RP/0/0/CPU0:router(config-pmap-c)# bandwidth 300
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit

RP/0/0/CPU0:router(config)# interface pos 0/1/0/0
RP/0/0/CPU0:router(config-if)# service-policy output policy1

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

set dscp

Marks a packet by setting the IP differentiated services code point (DSCP) in the type of service (ToS) byte.  

match atm

Enables packet matching on the basis of the ATM operations, administration, and maintenance (OAM) or cell loss priority (CLP).  

match cos

Identifies specified class of service (CoS) values as a match criteria in a class map.  

match precedence

Identifies IP precedence values as match criteria.  

match qos-group

Identifies specific quality-of-service (QoS) group values as match criteria in a class map.  

match source-address

Identifies a specific source MAC address as match criterion in a class map.  

match vlan

Identifies selected VLAN IDs as the match criteria for a class map.  

set dscp

Marks a packet by setting the IP differentiated services code point (DSCP) in the type of service (ToS) byte.  

match fr-de

To match packets on the basis of the Frame Relay discard eligibility (DE) bit setting, use the match fr-de command in class-map configuration mode. To remove the match criterion, use the no form of this command.

match fr-de fr-de-bit-value

no match fr-de fr-de-bit-value

Syntax Description

not

(Optional) Negates the specified match result.

fr-de-bit-value

Specifies the Frame Relay DE bit. Value can be 0 or 1.

Command Default

Packets are not matched on the basis of the Frame Relay DE bit setting.

Command Modes

Class map configuration

Command History

Release

Modification

Release 3.8.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

This match criterion can be used under a subinterface (L2 PVC) using the service-policy command, and it is supported in the ingress direction only. This match criterion can also be used in hierarchical policy maps.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to create a class called match-fr-de and match packets on the basis of the Frame Relay DE bit setting. Packets match Frame Relay DE bit 1.

RP/0/0/CPU0:router(config)# class-map match-fr-d
RP/0/0/CPU0:router(config-cmap)# match fr-de 1
RP/0/0/CPU0:routerrouter(config-cmap)# end

Related Commands

Command

Description

set fr-de

Changes the discard eligible (DE) bit setting in the address field of a Frame Relay frame to 1 for all traffic leaving an interface.  

match frame-relay dlci

To specify a Frame Relay packet data-link connection identifier (DLCI) number or number range as a match criterion in a class map, use the match frame-relay dlci command in class map configuration mode. To remove a previously specified DLCI number as a match criterion, use the no form of this command.

match frame-relay dlci [ Dlci | StartDlci-EndDlci ]

no match frame-relay dlci [ Dlci | StartDlci-EndDlci ]

Syntax Description

Dlci

A DLCI number associated with the packet. Range is from 16 to 1007.

StartDlci-EndDlci

A DLCI number range from 16 to 1007. Numbers are separated by a hyphen.

Command Default

No DLCI number is specified.

Command Modes

Class map configuration

Command History

Release

Modification

Release 3.4.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The match criterion for the match frame-relay dlci command can be used only on hierarchical policy maps.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to create the fr-dlci class map, and specify the Frame Relay DLCI number range 100-200 as a match criterion. Packets with DLCIs matching this criterion are placed in fr-dlci. In this example, class map fr-dlci evaluates all packets entering Packet-over-SONET/SDH (POS) interface 0/1/0/0.1 for DLCIs in the range from 100 through 200. If the incoming packet has been marked with the DLCI in the range from 100 through 200, the packet is queued to the class queue with the bandwidth setting of 300 kbps.

RP/0/0/CPU0:router(config)# class-map fr-dlci
RP/0/0/CPU0:router(config-cmap)# match frame-relay dlci 100-200
RP/0/0/CPU0:router(config-cmap)# end
RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class fr-dlci
RP/0/0/CPU0:router(config-pmap-c)# bandwidth 300
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit

RP/0/0/CPU0:router(config)# interface pos 0/1/0/0.1
RP/0/0/CPU0:router(config)# service-policy output policy1

RP/0/0/CPU0:router(config)# interface pos 0/1/0/0.1 point-to-point pvc 16
RP/0/0/CPU0:router(config-subif)# pvc 16
RP/0/0/CPU0:router(config-fr-vc)# service-policy output policy1

Related Commands

match mpls experimental topmost

To identify specific three-bit experimental (EXP) field values in the topmost Multiprotocol Label Switching (MPLS) label as match criteria for a class map, use the match mpls experimental topmost command in class map configuration mode. To remove experimental field values from the class map match criteria, use the no form of the command.

match mpls experimental topmost exp-value [ exp-value1 ...exp-value7 ]

no match mpls experimental topmost exp-value [ exp-value1 ...exp-value7 ]

Syntax Description

exp-value

Experimental value that specifies the exact value from 0 to 7. Up to eight experimental values can be specified to match MPLS headers.

Command Default

No default behavior or values

Command Modes

Class map configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.3.0

The not keyword was added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The match mpls experimental topmost command is used by the class map to identify MPLS experimental values matching on a packet.

To use the match mpls experimental topmost command, you must first enter the class-map command to specify the name of the class whose match criteria you want to establish. If you specify more than one match mpls experimental topmost command in a class map, the new values are added to the existing match statement.

This command examines the three experimental bits contained in the topmost label of an MPLS packet. Up to eight experimental values can be matched in one match statement. For example, match mpls experimental topmost 2 4 5 7 returns matches for experimental values of 2, 4, 5, and 7. Only one of the four values is needed to yield a match (OR operation).

The experimental values are used as a matching criterion only. The value has no mathematical significance. For instance, the experimental value 2 is not greater than 1. The value indicates that a packet marked with the experimental value of 2 should be treated differently than a packet marked with the EXP value of 1. The treatment of these different packets is defined by the user through the setting of QoS policies in policy map class configuration mode.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to configure the service policy called policy1 and attach service policy policy1 to an interface. In this example, class map mplsmap1 evaluates all packets entering GigabitEthernet interface 0/1/0/9 for an MPLS experimental value of 1. If the incoming packet has been marked with the MPLS experimental value of 1, the packet is queued to the class queue with the bandwidth setting of 300 kbps.

RP/0/0/CPU0:router(config)# class-map mplsmap1
RP/0/0/CPU0:router(config-cmap)# match mpls experimental topmost 1
RP/0/0/CPU0:router(config-cmap)# exit
RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class mplsmap1
RP/0/0/CPU0:router(config-pmap-c)# bandwidth 300
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit
RP/0/0/CPU0:router(config)# interface gigabitethernet 0/1/0/9
RP/0/0/CPU0:router(config-if)# service-policy input output policy1
  

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

match dscp

Identifies specific IP differentiated services code point (DSCP) values as match criteria for a class map.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

set mpls experimental

 

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

match precedence

To identify IP precedence values as match criteria, use the match precedence command in class map configuration mode. To remove precedence values from a class map, use the no form of this command.

match precedence [ ipv4 | ipv6 ] precedence-value [ precedence-value1 ... precedence-value7 ]

no match precedence [ ipv4 | ipv6 ] precedence-value [ precedence-value1 ... precedence-value7 ]

Syntax Description

ipv4

(Optional) Specifies the IPv4 precedence value.

ipv6

(Optional) Specifies the IPv6 precedence value.

precedence-value

An IP precedence value identifier that specifies the exact value. Range is from 0 to 7. Reserved keywords can be specified instead of numeric values. Table 1 describes the reserved keywords.

Up to eight precedence values can be matched in one match statement.

Command Default

Matching on both IP Version 4 (IPv4) and IPv6 packets is the default.

Command Modes

Class map configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The match precedence command specifies a precedence value that is used as the match criteria against which packets are checked to determine if they belong to the class specified by the class map.

To use the match precedence command, you must first enter the class-map command to specify the name of the class whose match criteria you want to establish. If you specify more than one match precedence command in a class map, only the last command entered applies.

The match precedence command examines the higher-order three bits in the type of service (ToS) byte of the IP header. Up to eight precedence values can be matched in one match statement. For example, match precedence ipv4 0 1 2 3 4 5 6 7 returns matches for IP precedence values of 0, 1, 2, 3, 4, 5, 6, and 7. Only one of the eight values is needed to yield a match (OR operation).

The precedence values are used as a matching criterion only. The value has no mathematical significance. For instance, the precedence value 2 is not greater than 1. The value simply indicates that a packet marked with the precedence value of 2 is different than a packet marked with the precedence value of 1. The treatment of these different packets is defined by the user through the setting of QoS policies in policy map class configuration mode.

The following table lists the IP precedence value number and associated name in descending order of importance.

Table 2 IP Precedence Values and Names

Value

Name

0

routine

1

priority

2

immediate

3

flash

4

flash-override

5

critical

6

internet

7

network

ipv4

ipv4 precedence

ipv6

ipv6 precedence

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to configure the service policy called policy1 and attach service policy policy1 to an interface. In this example, class map ipprec5 evaluates all packets entering GigabitEthernet interface 0/1/0/9 for a precedence value of 5. If the incoming packet has been marked with the precedence value of 5, the packet is queued to the class queue with the bandwidth setting 300 kbps.

RP/0/0/CPU0:router# configure
RP/0/0/CPU0:router(config)# class-map ipprec5
RP/0/0/CPU0:router(config-cmap)# match precedence ipv4 5	
RP/0/0/CPU0:router(config-cmap)# exit
RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class ipprec5
RP/0/0/CPU0:router(config-pmap-c)# bandwidth 300
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit
RP/0/0/CPU0:router(config)# interface gigabitethernet 0/1/0/9
RP/0/0/CPU0:router(config-if)# service-policy output policy1
  

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

set precedence

Sets the precedence value in the IP header.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

match qos-group

To identify specific quality-of-service (QoS) group values as match criteria in a class map, use the match qos-group command in class map configuration mode. To remove a specific QoS group value from the matching criteria for a class map, use the no form of this command.

match qos-group [ qos-group-value 1 ... qos-group-value7 ]

no match qos-group

Syntax Description

qos-group-value

QoS group value identifier that specifies the exact value from 0 to 31 or a range of values from 0 to 31. Up to eight values can be entered in one match statement.

Command Default

No match criteria are specified.

Command Modes

Class map configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Release 3.4.0

The qos-group-value argument was deleted from the no match command.

Release 3.7.0

Up to eight values or ranges on a single match statement, and up to 32 values or ranges specified on up to eight match statements for qos-group-value , were supported.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The match qos-group command sets the match criteria for examining QoS groups marked on the packet. Up to eight QoS group values can be matched in one match statement. For example, match qos-group 4 9 11 15 16 21 30 31 returns matches for QoS group values of 4, 9, 11, 15, 16, 21, 30, and 31. Only one of the eight values is needed to yield a match (OR operation).

The match qos-group command is used on the ingress match to support QoS Policy Propagation using BGP (QPPB). To use this command, you must first enter the class-map command to specify the name of the class whose match criteria you want to establish. If you specify more than one match qos-group command in a class map, the subsequent match statements are added to the first match qos-group command.

The QoS group value is used as a matching criterion only. The value has no mathematical significance. For instance, the QoS group value 2 is not greater than 1. The value simply indicates that a packet marked with the QoS group value of 2 should be treated differently than a packet marked with a QoS group value of 1. The treatment of these different packets is defined using the service-policy command in policy map class configuration mode.

The QoS group setting is limited in scope to the local router. Typically, the QoS group is set on the local router and is used in conjunction with WRED or MDRR to give differing levels of service based on the group identifier.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows a service policy called policy1 attached to an interface. In this example, class map qosgroup5 will evaluate all packets leaving GigabitEthernet 0/1/0/9 for a QoS group value of 5. If the packet has been marked with the QoS group value of 5, the packet is queued to the class queue with the bandwidth setting 300 kbps.

RP/0/0/CPU0:router(config)# class-map qosgroup5
RP/0/0/CPU0:router(config-cmap)# match qos-group 5
RP/0/0/CPU0:router(config-cmap)# exit
RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class qosgroup5
RP/0/0/CPU0:router(config-pmap-c)# bandwidth 300
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit
RP/0/0/CPU0:router(config)# interface gigabitethernet 0/1/0/9
RP/0/0/CPU0:router(config-if)# service-policy output policy1
  

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

set discard-class

Sets the discard class and Quality of Service (QoS) group identifiers on IP Version 4 (IPv4) or Multiprotocol Label Switching (MPLS) packets.  

set qos-group

Sets the quality of service (QoS) group identifiers on packets.  

match vlan

To identify selected VLAN IDs as the match criteria for a class map, use the match vlan command in class map configuration mode. To remove VLAN ID match criteria from a class map, use the no form of this command.

match vlan vlanid [ vlanid1 ... vlanid7 ]

no match vlan vlanid [ vlanid1 ... vlanid7 ]

Syntax Description

vlanid

VLAN identifier that specifies the exact value from 1 to 4094 or a range of values from 1 to 4094. Up to eight values can be specified in a match statement.

Command Default

No match criteria are specified.

Command Modes

Class map configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Release 3.4.0

Changed the range value from 0 to 8096. to 1 to 4094.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The match vlan command specifies a VLAN ID that is used as the match criteria against which packets are checked to determine if they belong to the class specified by the class map.

To use the match vlan command, you must first enter the class-map command to specify the name of the class whose match criteria you want to establish. If you specify more than one match vlan command in a class map, up to eight values of the subsequent match statements are added to the first match vlan command, exceeding which, the statement is rejected.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to configure the service policy called policy1 and attach service policy policy1 to an interface. In this example, class map vlan1 evaluates all packets entering Gigabit Ethernet interface 0/1/0/0 for VLAN IDs of 1234, 1698, and all the VLAN IDs in the range 3000 to 4000. If the incoming packet has been marked with any of these VLAN IDs, the packet is queued to the class queue with the bandwidth setting of 300 kbps.

RP/0/0/CPU0:router(config)# class-map vlan1  
RP/0/0/CPU0:router(config-cmap)# match vlan 1234 1698 3000-4000          
RP/0/0/CPU0:router(config-cmap)# exit 
RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class vlan1
RP/0/0/CPU0:router(config-pmap-c)# bandwidth 300 
RP/0/0/CPU0:router(config-pmap-c)# exit  
RP/0/0/CPU0:router(config-pmap)# exit
RP/0/0/CPU0:router(config)# interface gigabitethernet 0/1/0/0
RP/0/0/CPU0:router(config-if)# service-policy output policy1
  

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

police rate

To configure traffic policing and enter policy map police configuration mode, use the police rate command in policy map class configuration mode. To remove traffic policing from the configuration, use the no form of this command.

police rate { value [units] | percent percentage } [ burst burst-size [burst-units] ] [ peak-rate { value [units] | percent percentage } ] [ peak-burst peak-burst [burst-units] ]

no police rate { value [units] | percent percentage } [ burst burst-size [burst-units] ] [ peak-rate { value [units] | percent percentage } ] [ peak-burst peak-burst [burst-units] ]

Syntax Description

value

Committed information rate (CIR). Range is from 1 to 4294967295. For 8 kbps granularity the maximum value is 2.1 gbps, for 16 kbps granularity the maximum value is 4.2gbps, and for 32kbps granularity the maximum value is 8.4gbps.

units

(Optional) Unit of measurement for the CIR. Values can be:

  • bps —bits per second (default)
  • gbps —gigabits per second
  • kbps —kilobits per second
  • mbps —megabits per second

percent percentage

Specifies the police rate as a percentage of the CIR. Range is from 1 to 100. See the Usage Guidelines for information on how to use this keyword.

burst burst-size

(Optional) Specifies the burst size (in the specified burst-units ). Range is from 1 to 4294967295.

burst-units

(Optional) Unit of measurement for the burst values. Values can be:

  • bytes —bytes (default)
  • gbytes —gigabytes
  • kbytes —kilobytes
  • mbytes —megabytes
  • ms —milliseconds
  • us —microseconds

peak-rate value

(Optional) Specifies the Peak Information Rate (PIR) in the specified units . Range is from 1 to 4294967295.

peak-burst peak-burst

(Optional) Specifies the peak burst size in the specified burst-units . Range is from 1 to 4294967295.

Command Default

No restrictions on the flow of data are applied to any interface.

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.2

This command was introduced without the pir and violate-action keywords.

Release 3.3.0

The command name was changed from police cir to police rate .

The keywords bc , be , and pir were changed to burst , peak-burst , and peak-rate , respectively.

The units argument was added.

The default units for the rate, peak rate, and burst rate changed from kbps to bps.

The keywords mpls experimental imposition were added to the action argument.

Release 3.4.0

This command now enters policy-map police configuration mode.

The conform-action , exceed-action and violate-action keywords changed into commands within the policy-map police configuration mode.

The cos and transmit keywords were added to the action argument. The atm-clp keyword was added.

Release 3.6.0

The packets burst value option was removed.

Release 3.7.0

Hierarchical ingress policing was supported.

Release 3.9.0

The granularity of the police rate specified changed to 8 kbps.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The traffic policing feature works with a single-token bucket algorithm.

The police rate can set the DSCP, the precedence, or the discard class for IP packets, and experimental and discard-class values for MPLS packets.

For bundled interfaces, traffic policing can be configured only as a percentage.

Policing can be applied in both ingress and egress directions.

The parameters set by the action keywords are rounded by the hardware. To check the actual values programmed in the hardware use the show qos interface command.

For police rate commands, interpret the percent keyword in this way:

  • For a one-level policy, the percent keyword specifies the CIR as a percentage of the link rate. For example, the command police rate percent 35 configures the CIR as 35% of the link rate.
  • For a two-level policy, in the parent policy, the percent keyword specifies the parent CIR as a percentage of the link rate. In the child policy, the percent keyword specifies the child CIR as a percentage of the maximum policing or shaping rate of the parent. If traffic policing or shaping is not configured on the parent, the parent inherits the interface policing or shaping rate.

Note


Configured values take into account the Layer 2 encapsulation applied to traffic. This applies to both ingress and egress policing. For POS/SDH transmission, the encapsulation is considered to be 4 bytes. For Ethernet, the encapsulation is 14 bytes; whereas for 802.1Q, the encapsulation is 18 bytes.


If the burst value is not specifically configured, it is automatically set to equate to 250 msec-worth of the CIR value. For example, if a CIR value of 1000000 kbps is entered, the burst value is calculated to be 32000000 bytes. However, the maximum burst value supported is 16777215 bytes.

Hierarchical policing is also supported. In such a configuration, both parent and child policies have class-maps containing policing statements, as in this example:

!
policy-map child
 class gold
  police rate percent 50 
  conform-action set precedence immediate 
  exceed-action drop
 !
!
policy-map parent
 class match_all
  police rate 10000 kbps burst 15000 
  exceed-action drop
  service-policy child
 !

The router supports hierarchical ingress policing, which consists of a two-level hierarchical policy-map. The two levels are:

  • Parent level: Consists of a class-default or match-vlan class (in nCmD model) only and has policing with only transmit/drop actions.
  • Child level: Consists of a flat policy that can be configured with any action other than the queuing action. This level does not contain configurations that require a continuous bit support.

You can police the ingress interface while applying different classification submodels on the ingress interfaces. The order of the actions within the hierarchical policy-map is from child to parent as specified by the Modular Quality of Service command-line interface (MQC). This is with the exception of the queuing action (shape), which is executed after any police/set actions. If a police action is configured in a child policy, the child police action is executed before the parent police action.

The police action is invoked with only transmit/drop actions under the conform-action and exceed-action options specified for class-default traffic.

This example explains a hierarchical policer configuration:

!
policy-map parent
 class class-default

service-policy child
  police rate percent 50 
  conform-action transmit 
  exceed-action drop

 !

Task ID

Task ID

Operations

qos

read, write

Examples

Example

In this example for MPLS, traffic policing is configured with the average rate at 250 kbps, and the normal burst size at 50 bytes for all packets leaving GigabitEthernet interface 0/1/0/9:

RP/0/0/CPU0:router(config)# class-map class1            
RP/0/0/CPU0:router(config-cmap)# match mpls experimental topmost 0
RP/0/0/CPU0:router(config-cmap)# exit

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# police rate 250 kbps burst 50
RP/0/0/CPU0:router(config-pmap-c-police)#conform-action set mpls experimental topmost 4
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit

RP/0/0/CPU0:router(config)# interface gigabitethernet 0/1/0/9
RP/0/0/CPU0:router(config-if) service-policy input policy1
  

Related Commands

Command

Description

child-conform-aware

Prevents the parent policer from dropping any ingress traffic that conforms to the maximum rate specified in the child policer.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

policy-map

To create or modify a policy map that can be attached to one or more interfaces to specify a service policy, use the policy-map command in global configuration mode. To delete a policy map, use the no form of this command.

policy-map [ type qos ] policy-name

no policy-map [ type qos ] policy-name

Syntax Description

type qos

(Optional) Specifies a quality-of-service (QoS) policy map.

policy-name

Name of the policy map.

Command Default

A policy map does not exist until one is configured. Because a policy map is applied to an interface, no restrictions on the flow of data are applied to any interface until a policy map is created.

Type is QoS when not specified.

Command Modes

Global configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.3.0

Maximum number of classes permitted per policy map was increased to 32.

Release 3.6.0

The type qos keywords were added.

Maximum number of classes permitted per policy map was increased to 512.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the policy-map command to specify the name of the policy map to be created, added to, or modified before you can configure policies for classes whose match criteria are defined in a class map. Entering the policy-map command enables policy map configuration mode in which you can configure or modify the class policies for that policy map.

You can configure class policies in a policy map only if the classes have match criteria defined for them. Use the class-map and match commands to configure the match criteria for a class. Because you can configure a maximum of 512 classes in one policy map, no policy map can contain more than 512 class policies. The maximum number of 512 classes per policy includes the implicit default class and its child policies.

A single policy map can be attached to multiple interfaces concurrently.

Task ID

Task ID

Operations

qos

read, write

Examples

The following examples show how to create a policy map called policy1 and configures two class policies included in that policy map. The policy map is defined to contain policy specification for class1 and the default class (called class-default) to which packets that do not satisfy configured match criteria are directed. Class1 specifies policy for traffic that matches access control list 136.

RP/0/0/CPU0:router(config)# class-map class1
RP/0/0/CPU0:router(config-cmap)# match access-group ipv4 136

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# police cir 250
RP/0/0/CPU0:router(config-pmap-c)# set precedence 3
RP/0/0/CPU0:router(config-pmap-c)# exit

RP/0/0/CPU0:router(config-pmap)# class class-default
RP/0/0/CPU0:router(config-pmap-c)# queue-limit 1000000 bytes
  

Related Commands

Command

Description

class (policy-map)

Specifies the name of the class whose policy you want to create or change.  

class-map

Defines a traffic class and the associated rules that match packets to the class.  

priority (QoS)

To assign a priority to a class of traffic belonging to a policy map, use the priority command in policy map class configuration mode. To remove a previously specified priority for a class, use the no form of this command.

priority [ level priority-level ]

no priority

Syntax Description

level priority-level

(Optional) Sets the class priority level value. Value can be 1. Default level is 1. Level 1 traffic has higher priority.

Command Default

If a priority action is not configured in a class, traffic in that class is not serviced with strict priority.

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.9.0

The level keyword was added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The priority command configures low-latency queueing (LLQ), providing strict priority queueing (PQ). Strict PQ allows delay-sensitive data such as voice to be dequeued and sent before packets in other queues are dequeued. When a class is marked as high priority using the priority command, we recommend that you configure a policer to limit the priority traffic. This policer ensures that the priority traffic does not starve all other traffic on the line card, which protects low-priority traffic from starvation. Use the police rate to explicitly configure the policer.

The priority command sets up classes based on a variety of criteria (not just User Datagram Protocol [UDP] ports) and assigns a priority to them.

The bandwidth and priority commands cannot be used in the same class, within the same policy map. These commands can be used together in the same policy map, but only when the priority class has the policer limit configured .

There cannot be a WRED action along with a priority configuration in the same class. Only one class under a policy map can have a priority action configured.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to configure priority queuing for the policy map named policy1:

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1

RP/0/0/CPU0:router(config-pmap-c)# priority level 1

Related Commands

Command

Description

bandwidth (QoS)

Specifies the minimum bandwidth allocated to a class belonging to a policy map.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

queue-limit

To specify or modify the maximum number of packets the queue can hold for a class policy configured in a policy map, use the queue-limit command in policy map class configuration mode. To remove the queue packet limit from a class, use the no form of this command.

queue-limit { value [unit] | atm-clp atm-value atm-unit tail-value [tail-unit] }

no queue-limit

Syntax Description

value

Maximum threshold for tail drop in bytes. Range is from 1 to 4294967295.

unit

(Optional) Units for the queue limit value. Values can be:

  • cells —cells (ATM subinterfaces only)
  • ms —milliseconds
  • packets —packets (default)
  • us —microseconds
Note   

When the specified units is packets, packets are assumed to be 256 bytes in size.

atm-clp

Specifies an ATM cell loss priority (CLP)-based queue limit.

atm-value

Maximum threshold for the ATM CLP value. Range is from 1 to 4294967295.

atm-unit

ATM CLP unit. Values can be:

  • cells —cells
  • ms —milliseconds
  • us —microseconds

tail-value

Maximum threshold for tail drop. Range is from 1 to 4294967295.

tail-unit

(Optional) Tail drop unit. Values can be:

  • cells —cells
  • ms —milliseconds
  • packets —packets (default)
  • us —microseconds

Command Default

100 milliseconds: maximum threshold for tail drop

10 milliseconds: maximum threshold for high-priority queues

Maximum threshold units are in packets.


Note


The default queue limit is 200 ms. Default queue limits are calculated considering 200 ms of data and assuming an average packet size of 256 bytes.


Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.3.0

Command name changed from queue-limit bytes to queue-limit .

Command order modified to place value before units.

The units argument was added.

Default units was changed from bytes to packets.

Release 3.6.0

The value range of 1 to 1000000000 has changed to 1 to 4294967295.

The cells unit keyword and argument were added.

The default threshold for tail drop changed from 200 milliseconds to 100 milliseconds.

Release 3.8.0

The atm-clp keyword was added for supporting the virtual circuit (VC) queuing on the segmentation and reassembly (SAR) in the egress direction.

Two discard threshold settings, CLP1 and CLP0+1, were supported using an extension to the queue-limit modular QoS CLI (MQC) configuration.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Packets satisfying the match criteria for a class accumulate in the queue reserved for the class until they are serviced by the scheduling mechanism. The queue-limit command defines the maximum threshold for a class. When that threshold is reached, enqueued packets to the class queue result in tail drop (packet drop). Tail drop is a congestion avoidance technique that drops packets when an output queue is full, until congestion is eliminated.

Use the show qos interface command to display the queue limit and other policer values.

Queue Limit Default Values

The following default values are used when queue-limit is not configured in the class:

  • If QoS is not configured:
    • The queue limit is 16384 packets for the class default and priority queues when no actions are configured.
  • If QoS is configured and Weighted Random Early Detection (WRED) is not configured:
    • Queue limit is 200 ms at the guaranteed service rate of the queue for non-priority queues.
    • When priority is configured with policing with an exceed action of DROP: queue limit = (rate_kpbs) * 200 / 8, where rate_kbps = (Police Be + Police Bc) * 8 / 1000, and Bc is conformed police rate, Be is exceeded police rate
    • When priority configured with policing with an exceed action other than DROP: queue limit = (rate_kpbs) * 200 / 8, where rate_kbps = police rate.
    • When priority configured without policing: queue limit = (rate_kpbs) * 200 / 8, where rate_kbps = interface rate / 2 for flat policies, and rate_kbps = parent shape rate / 2 for hierarchicalpolicies.
  • If QoS is configured and WRED is configured:
    • Queue limit is two times the WRED maximum threshold. The maximum threshold is an explicitly configured value.
    • If more than one WRED profile is configured in the class, the maximum threshold is the maximum for all profiles.
    • When the queue-limit is configured in time units, the guaranteed service rate is used to compute the queue limit.

When the queue limit is configured in time units, the guaranteed service rate of the class is used to calculate the queue limit in bytes. For example: time_unit in ms * guaranteed_service_rate in kbps / 8 is equivalent to queue-limit in bytes.

The following restrictions apply to queue limits:

  • The maximum queue limit is 262143 bytes.
  • Only time-based units are allowed on bundle targets.

Guaranteed Service Rate

The guaranteed service rate is defined as the service rate of the queue when all queues are backlogged and derived as:

minimum_bandwidth + (bandwidth_remaining_percent * unallocated_bandwidth)

The following example shows the guaranteed service rate calculation:

policy-map sample_policy
  class c1
    bandwidth percent 30
    bandwidth remaining percent 40
  class c2
    bandwidth percent 20
  class class-default
  

guaranteed service rate of c1 = 30 percent LR + (40 percent * 50 percent * LR)

guaranteed service rate of c2 = 20 percent LR + (30 percent * 50 percent * LR)

guaranteed service rate of class-default = 30 percent * 50 percent * LR

  • Where LR is line rate of the target on which service policy "sample_policy" is attached.
  • 50 percent is unallocated bandwidth.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to set the queue limit for a class to 1000000 packets for policy map policy1:

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# queue-limit 1000000
  

Related Commands

Command

Description

class (policy-map)

Specifies the name of the class whose policy you want to create or change.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

show qos interface

Displays QoS information for a specific interface.  

random-detect

To enable random early detection (RED), use the random-detect command in policy map class configuration mode. To remove RED, use the no form of this command.

random-detect { discard-class value | dscp value | exp value | precedence value | min-threshold [units] max-threshold [units] }

no random-detect [ discard-class value | dscp value | exp value | precedence value | min-threshold [units] max-threshold [units] ]

Syntax Description

discard-class value

Discard-class based WRED.

dscp value

DSCP-based WRED.

exp value

MPLS Experimental-based WRED.

precedence value

Precedence-based WRED. Values can be:

  • 0 or routine
  • 1 or priority
  • 2 or immediate
  • 3 or flash
  • 4 or flash-override
  • 5 or critical
  • 6 or internet
  • 7 or network

min-threshold

Minimum threshold in number of packets. The value range of this argument is from 0 to 1073741823 in bytes.

max-threshold

Maximum threshold the units specified. The value range of this argument is from the value of the min-threshold argument or 23, whichever is larger, to 1073741823. When the average queue length exceeds the maximum threshold, RED drops all packets with the specified discard class value.

units

(Optional) Units for the threshold values. Values can be:

  • cells—cells (ATM subinterfaces only)
  • ms —milliseconds
  • packets —packets (default)
  • us —microseconds

Command Default

Default unit for max-threshold and min-threshold is packets .

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Release 3.6.0

The cells unit was added.

The default keyword was removed.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The RED congestion avoidance technique takes advantage of the congestion control mechanism of TCP. By randomly dropping packets before periods of high congestion, RED tells the packet source to decrease its transmission rate. Assuming the packet source is using TCP, it decreases its transmission rate until all the packets reach their destination, indicating that the congestion is cleared. You can use RED as a way to cause TCP to slow transmission of packets. TCP not only pauses, but it also restarts quickly and adapts its transmission rate to the rate that the network can support.

RED distributes losses in time and maintains normally low queue depth while absorbing traffic bursts. When enabled on an interface, RED begins dropping packets when congestion occurs at a rate you select during configuration.

When time units are used, the guaranteed service rate is used to compute thresholds.

The default values for RED are calculated as follows:

default min_threshold = 0.03 * B

default max_threshold = 0.1 * B

where B is the bandwidth for the queue. When all the queues are congested, the bandwidth for the queue is equal to the guaranteed service rate of the queue.

The mark probability is always set to 1.

When the value of the units argument is packets, packets are assumed to be 256 bytes in size.

For the random-detect command to take effect, you must configure the shape average , bandwidth (QoS) , or bandwidth remaining commands in the user-defined policy map class. This dependency is not applicable to the class default for the policy map class.

Weighted Random Early Detection

The following restrictions apply to Weighted Random Early Detection (WRED):

  • For thresholds in time units, the guaranteed service rate is used to calculate the thresholds in bytes.
  • Default RED minimum threshold—30 ms at the guaranteed service rate.
  • Default RED maximum threshold—100 ms as the guaranteed service rate.

For bundles, queue limit and WRED thresholds are supported in time units only.


Note


RED is enabled when you configure any of the supported random-detect commands.


Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to enable RED using a minimum threshold value of 1000000 and a maximum threshold value of 2000000:

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# random-detect 1000000 2000000
  

Related Commands

Command

Description

random-detect precedence

Configures the Weighted Random Early Detection (WRED) thresholds for packets with a particular IP precedence.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

random-detect discard-class

To configure the Weighted Random Early Detection (WRED) thresholds for packets with a specific discard class value, use the random-detect discard-class command in policy map class configuration mode. To return the thresholds to the default for the discard class, use the no form of this command.

random-detect discard-class discard-value min-threshold [units] max-threshold [units]

no random-detect discard-class discard-value min-threshold [units] max-threshold [units]

Syntax Description

discard-value

Discard class value. Valid values are from 0 to 7. Up to eight values can be entered separated by commas.

min-threshold

Minimum threshold in number of packets. The value range of this argument is from 0 to 1073741823 in bytes.

max-threshold

Maximum threshold in number of packets. The value range of this argument is from the value of the min-threshold argument to 1073741823. When the average queue length exceeds the maximum threshold, WRED drops all packets with the specified discard class value.

units

(Optional) Units for the threshold values. Values can be:

  • cells—cells
  • ms—milliseconds
  • packets—packets (default)
  • us—microseconds

Command Default

Default unit for max-threshold and min-threshold is packets .

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Release 3.4.0

The units argument was added to allow specifying the units of the thresholds.

The discard-value min-threshold max-threshold arguments were deleted form the no random-detect discard-class command.

Release 3.6.0

The discard-value argument can accept up to eight values separated by commas.

The cells unit was added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

For the random-detect discard-class command to take effect, you must configure the shape average, bandwidth (QoS), or bandwidth remaining commands in the user-defined policy map class. This dependency is not applicable to the class default for the policy map class.

WRED is a congestion avoidance mechanism that slows traffic by randomly dropping packets when congestion exists. WRED is most useful with protocols like TCP that respond to dropped packets by decreasing the transmission rate.

When you configure the random-detect discard-class command on an interface, packets are given preferential treatment based on the discard class of the packet.

When the value of the units argument is packets, packets are assumed to be 256 bytes in size.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to set the discard class values for discard class 3 to a minimum byte threshold of 1000000 and a maximum byte threshold of 2000000:

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# random-detect discard-class 3 1000000 2000000
  

Related Commands

Command

Description

class (policy-map)

Specifies the name of the class whose policy you want to create or change.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

random-detect precedence

Configures the Weighted Random Early Detection (WRED) thresholds for packets with a particular IP precedence.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

random-detect dscp

To configure the Weighted Random Early Detection (WRED) thresholds for packets with a specific differentiated services code point (DSCP) value, use the random-detect dscp command in policy map class configuration mode. To return the thresholds to the default for the DSCP value, use the no form of this command.

random-detect dscp dscp-value min-threshold [units] max-threshold [units]

no random-detect dscp dscp-value min-threshold [units] max-threshold [units]

Syntax Description

dscp-value

DSCP value. Up to eight dscp-values (any combination of numbers, ranges, and reserved keywords) can be used separated by commas. The following arguments are supported:

  • Number from 0 to 63 that sets the DSCP value.
  • Range of DSCP values. Range is from 0 to 63.
  • Reserved keywords can be specified instead of numeric values. Table 1 describes the reserved keywords.

min-threshold

Minimum threshold in number of packets. The value range of this argument is from 0 to 1073741823. When the average queue length reaches the minimum threshold, WRED randomly drops some packets with the specified DSCP value.

max-threshold

Maximum threshold in number of packets. The value range of this argument is from the value of the min-threshold argument to 1073741823. When the average queue length exceeds the maximum threshold, WRED drops all packets with the specified DSCP value.

units

(Optional) Units for the threshold values. Values can be:

  • cells—cells
  • ms—milliseconds
  • packets—packets (default)
  • us—microseconds

Command Default

Match packets with default DSCP (000000).

Default unit for max-threshold and min-threshold is packets.

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.4.0

The units argument was added to allow specifying the units of the thresholds.

The dscp-value min-threshold max-threshold arguments were deleted from the no random-detect dscp command.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

WRED is a congestion avoidance mechanism that slows traffic by randomly dropping packets when congestion exists. WRED is most useful with protocols like TCP that respond to dropped packets by decreasing the transmission rate.

For the random-detect dscp command to take effect, you must configure the shape average , bandwidth (QoS) , or bandwidth remaining commands in the user-defined policy map class. This dependency is not applicable to the class default for the policy map class.

Reserved keywords can be specified instead of numeric values. See Table 1 for the list of keywords.

When the value of the units argument is packets, packets are assumed to be 256 bytes in size.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows that for packets with DSCP AF11, the WRED minimum threshold is 1,000,000 bytes and the maximum threshold is 2,000,000 bytes:

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# random-detect dscp AF11 1000000 2000000

Related Commands

Command

Description

class (policy-map)

Specifies the name of the class whose policy you want to create or change.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

random-detect precedence

Configures the Weighted Random Early Detection (WRED) thresholds for packets with a particular IP precedence.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

random-detect exp

To configure the Weighted Random Early Detection (WRED) thresholds for packets marked with a specific MPLS experimental (EXP) bit value, use the random-detect exp command in policy map class configuration mode. To return the value to the default, use the no form of this command.

random-detect exp exp-value min-threshold [units] max-threshold [units]

no random-detect exp exp-value min-threshold [units] max-threshold [units]

Syntax Description

exp-value

MPLS experimental value. Valid values are from 0 to 7. Up to eight values can be entered separated by commas.

min-threshold

Minimum threshold in number of packets. The value range of this argument is from 0 to 1073741823 in bytes.

max-threshold

Maximum threshold in units specified. The value range of this argument is from the value of the min-threshold argument to 1073741823. When the average queue length exceeds the maximum threshold, WRED drops all packets with the specified experimental value.

units

(Optional) Units for the threshold values. Values can be:

  • cells—cells
  • ms—milliseconds
  • packets—packets (default)
  • us—microseconds

Command Default

Default unit for max-threshold and min-threshold is packets .

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Release 3.4.0

The exp-value min-threshold max-threshold arguments were deleted form the no random-detect exp command.

Release 3.6.0

The exp-value argument can accept up to eight values separated by commas.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

For the random-detect exp command to take effect, you must configure the shape average , bandwidth (QoS) , or bandwidth remaining commands in the user-defined policy map class. This dependency is not applicable to the class default for the policy map class.

WRED is a congestion avoidance mechanism that slows traffic by randomly dropping packets when congestion exists. WRED is most useful with protocols like TCP that respond to dropped packets by decreasing the transmission rate.

When the value of the units argument is packets, packets are assumed to be 256 bytes in size.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows that for Multiprotocol Label Switching (MPLS) packets with an EXP field value of 4, the WRED minimum threshold is 1,000,000 bytes and the maximum threshold is 2,000,000 bytes:

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# random-detect exp 4 1000000 20000

Related Commands

Command

Description

class (policy-map)

Specifies the name of the class whose policy you want to create or change.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

random-detect dscp

Configures the Weighted Random Early Detection (WRED) thresholds for packets with a specific differentiated services code point (DSCP) value.  

random-detect precedence

Configures the Weighted Random Early Detection (WRED) thresholds for packets with a particular IP precedence.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

random-detect precedence

To configure the Weighted Random Early Detection (WRED) thresholds for packets with a particular IP precedence, use the random-detect precedence command in policy map class configuration mode. To return the thresholds to the default for the precedence, use the no form of this command.

random-detect precedence precedence-value min-threshold [units] max-threshold [units]

no random-detect precedence precedence-value min-threshold [units] max-threshold [units]

Syntax Description

precedence-value

An IP precedence value identifier that specifies the exact value. Range is from 0 to 7. Reserved keywords can be specified instead of numeric values. Table 1 describes the reserved keywords. Up to eight values or reserved keywords can be entered separated by commas.

min-threshold

Minimum threshold in number of packets. Range is from 0 to 1073741823 in bytes.

max-threshold

Maximum threshold in the units specified. Range is from the value of the min-threshold argument to 1073741823. When the average queue length exceeds the maximum threshold, WRED drops all packets with the specified precedence value.

units

(Optional) Units for the threshold values. Values can be:

  • cells—cells
  • ms—milliseconds
  • packets—packets (default)
  • us—microseconds

Command Default

Default unit for max-threshold and min-threshold is packets.

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.3.0

The units argument was added to allow specifying the units of the thresholds.

Release 3.4.0

The precedence-value min-threshold max-threshold arguments were deleted from the no random-detect precedence command.

Release 3.6.0

The precedence-value argument can accept up to eight values or reserved keywords separated by commas.

The cells unit keword and argument were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

For the random-detect precedence command to take effect, you must configure the shape average, bandwidth (QoS), or bandwidth remaining commands in the user-defined policy map class. This dependency is not applicable to the class default for the policy map class.

WRED is a congestion avoidance mechanism that slows traffic by randomly dropping packets when congestion exists. WRED is most useful with protocols like TCP that respond to dropped packets by decreasing the transmission rate.

When you configure the random-detect command on an interface, packets are given preferential treatment based on the IP precedence of the packet. Use the random-detect precedence command to adjust the treatment for different precedences.

When the value of the units argument is packets, packets are assumed to be 256 bytes in size.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows that for packets with precedence 3, the WRED minimum threshold is 1,000,000 bytes and maximum threshold is 2,000,000 bytes:

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)#random-detect precedence 3 1000000 2000000
  

Related Commands

Command

Description

bandwidth (QoS)

Specifies the minimum bandwidth allocated to a class belonging to a policy map.  

class (policy-map)

Specifies the name of the class whose policy you want to create or change.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

random-detect dscp

Configures the Weighted Random Early Detection (WRED) thresholds for packets with a specific differentiated services code point (DSCP) value.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

service-policy (interface)

To attach a policy map to an input interface or output interface to be used as the service policy for that interface, use the service-policy command in the appropriate configuration mode. To remove a service policy from an input or output interface, use the no form of the command.

service-policy { input | output } policy-map [ account nolayer2 ]

no service-policy { input | output } policy-map [ account nolayer2 ]

Syntax Description

input

Attaches the specified policy map to the input interface.

output

Attaches the specified policy map to the output interface.

policy-map

Name of a service policy map (created using the policy-map command) to be attached.

account nolayer2

(Optional) Turns off layer 2 QoS-specific accounting and enables Layer 3 QoS accounting.

Command Default

No service policy is specified.

Command Modes

Interface configuration

Layer 2 transport configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.4.0

The pre-decrypt, post-decrypt, and pre-encrypt keywords were added for IPSec.

Release 3.5.0

The pre-decrypt, post-decrypt, and pre-encrypt keywords were removed.

Release 3.6.0

The command was supported in Layer 2 transport configuration mode.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

You can attach a single policy map to one or more interfaces to specify the service policy for those interfaces. The class policies composing the policy map are then applied to packets that satisfy the class map match criteria for the class. To apply a new policy to an interface, you must remove the previous policy. A new policy cannot replace an existing policy.

The default packet size for QoS accounting on 10 Gbps IP Services Engine (Engine 5) and Multirate 10G IP Services Engines (Engine 5+) line cards is Layer 2 packet size. The account nolayer2 option allows you to specify a Layer 3 packet size for QoS accounting. This option is enabled in a policy map and applies to a specific interface. It does not apply to any other interface on the line card or to any other line card on the router.

Less traffic passes through the network using Layer 2 packet size than using Layer 3 packet size. The account nolayer2 option allows service providers to tailor the amount of traffic that is passed to particular users, and to use QoS accounting based on Layer 3 packet size.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows policy map policy1 applied to Packet-over-SONET/SDH (POS) interface 0/2/0/0:

RP/0/0/CPU0:router(config)# class-map class1
RP/0/0/CPU0:router(config-cmap)# match precedence ipv4 1
RP/0/0/CPU0:router(config-cmap)# exit
RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# set precedence 2
RP/0/0/CPU0:router(config-pmap)# exit
RP/0/0/CPU0:router(config)# interface pos 0/2/0/0
RP/0/0/CPU0:router(config-if)# service-policy output policy1
  

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

service-policy (policy map class)

Uses a service policy as a QoS policy within a policy map.  

service-policy (policy map class)

To use a service policy as a QoS policy within a policy map (called a hierarchical service policy), use the service-policy command in policy map class configuration mode. To disable a particular service policy as a QoS policy within a policy map, use the no form of this command.

service-policy [ type qos ] policy-map-name

no service-policy [ type qos ] policy-map-name

Syntax Description

type qos

(Optional) Specifies a QoS service policy.

policy-map-name

Name of the predefined policy map to be used as a QoS policy. The name can be a maximum of 40 alphanumeric characters.

Command Default

No service policy is specified.

Type is QoS when not specified.

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Release 3.6.0

The type qos keywords were added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The service-policy (policy-map class) command creates hierarchical service policies in policy-map class configuration mode.

This command is different from the service-policy (interface) command used in interface configuration mode.

The child policy is the previously defined service policy that is being associated with the class default of the parent policy-map. The new service policy using the preexisting service policy is the parent policy.

The service-policy (policy-map class) command has the following restrictions:

  • The priority command cannot be used in the parent policy; it can only be used in the child policy.
  • The bandwidth command cannot be used in the parent policy.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to create a hierarchical service policy in the service policy called parent:

RP/0/0/CPU0:router(config)# policy-map child
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# priority
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit
RP/0/0/CPU0:router(config)# policy-map parent
RP/0/0/CPU0:router(config-pmap)# class class-default
RP/0/0/CPU0:router(config-pmap-c)# shape average 10000000
RP/0/0/CPU0:router(config-pmap-c)# service-policy child

Related Commands

Command

Description

bandwidth (QoS)

Specifies the minimum bandwidth allocated to a class belonging to a policy map.  

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

priority (QoS)

Assigns a priority to a class of traffic belonging to a policy map.  

service-policy (interface)

Attachs a policy map to an input interface or output interface to be used as the service policy for that interface.  

set atm-clp

To set the cell loss priority (CLP) bit when a policy map is configured, use the set atm-clp command in policy map class configuration mode. To remove a specific CLP bit setting, use the no form of this command.

set atm-clp

no set atm-clp

Syntax Description

This command has no keywords or arguments.

Command Default

The CLP bit is automatically set to 0 when Cisco routers convert IP packets into ATM cells for transmission through Multiprotocol Label Switching (MPLS)-aware ATM networks.

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.4.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The set atm-clp command sets the CLP bit within the packet. After the CLP bit is set, other QoS services such as Modified Deficit Round Robin (MDRR) and Weighted Random Early Detection (WRED) can operate on the bit settings.

A policy map containing the set atm-clp command can be attached as an output policy only. The set atm-clp command does not support packets that originate from the router.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example illustrates setting the CLP bit using the set atm-clp command in the policy map:

RP/0/0/CPU0:router(config)# class-map c1
RP/0/0/CPU0:router(config-cmap)# match precedence ipv4 0 1
RP/0/0/CPU0:router(config-cmap)# exit

RP/0/0/CPU0:router(config)# policy-map atm-clp-set
RP/0/0/CPU0:router(config-pmap)# class c1
RP/0/0/CPU0:router(config-pmap-c)# set atm-clp
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit

RP/0/0/CPU0:router(config)# interface atm 0/2/0/0.1
RP/0/0/CPU0:router(config-subif)# pvc 10/100
RP/0/0/CPU0:router(config-atm-vc)# service-policy output atm-clp-set
RP/0/0/CPU0:router(config-atm-vc)# end

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

service-policy (interface)

Attachs a policy map to an input interface or output interface to be used as the service policy for that interface.  

set cos

To set the Layer 2 class of service (CoS) value of an outgoing packet, use the set cos command in policy map class configuration mode. To remove a specific CoS value setting, use the no form of this command.

set cos cos-value

no set cos cos-value

Syntax Description

cos-value

Specific IEEE 802.1Q CoS value from 0 to 7.

Command Default

No Layer 2 CoS value of an outgoing packet is set.

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Use the set cos command to mark a packet that is being sent to a switch. Switches can leverage Layer 2 header information, including a CoS value marking.

For Layer 3, the set cos command can be used only in service policies that are attached in the output direction of an interface. Packets entering an interface cannot be set with a CoS value.

Task ID

Task ID

Operations

qos

read, write

Examples

In the following example, the policy map called cos-set is created to assign different CoS values for different service classes, and then is attached to the output Gigabit Ethernet VLAN subinterface 0/1/0/9.100.

RP/0/0/CPU0:router(config)# policy-map cos-set
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# set cos 1
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# class class2
RP/0/0/CPU0:router(config-pmap-c)# set cos 2
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit
RP/0/0/CPU0:router(config)# interface gigabitethernet 0/1/0/9.100
RP/0/0/CPU0:router(config-if)# service-policy output cos-set
  

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

service-policy (interface)

Attachs a policy map to an input interface or output interface to be used as the service policy for that interface.  

set discard-class

To set the discard class and Quality of Service (QoS) group identifiers on IP Version 4 (IPv4) or Multiprotocol Label Switching (MPLS) packets, use the set discard-class command in policy map class configuration mode. To leave the discard-class values unchanged, use the no form of this command.

set discard-class discard-class-value

no set discard-class discard-class-value

Syntax Description

discard-class-value

Discard class ID. An integer from 0 to 7, to be marked on the packet.

Command Default

No group ID is specified.

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The set discard-class command associates a discard class ID with a packet. After the discard class and QoS group IDs are set, other QoS services such as Modified Deficit Round Robin (MDRR) and Weighted Random Early Detection (WRED) can operate on the bit settings.

Discard-class indicates the discard portion of the per hop behavior (PHB). The set discard-class command is typically used in Pipe mode. Discard-class is required when the input PHB marking is used to classify packets on the output interface.

The discard-class values can be used to specify the type of traffic that is dropped when there is congestion.


Note


Marking of the discard class and the QoS group has only local significance on a node.


Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to set the discard class value to 5 for packets that match the MPLS experimental bits 1:

RP/0/0/CPU0:router(config)# class-map cust1
RP/0/0/CPU0:router(config-cmap)# match mpls experimental topmost 1
RP/0/0/CPU0:router(config-cmap)# exit
RP/0/0/CPU0:router(config)# policy-map policy2
RP/0/0/CPU0:router(config-pmap)# class cust1
RP/0/0/CPU0:router(config-pmap-c)# set discard-class 5
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit
RP/0/0/CPU0:router(config)# interface gigabitethernet 0/1/0/9
RP/0/0/CPU0:router(config-if)# service-policy input policy2
  

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

service-policy (interface)

Attachs a policy map to an input interface or output interface to be used as the service policy for that interface.  

set dscp

To mark a packet by setting the IP differentiated services code point (DSCP) in the type of service (ToS) byte, use the set dscp command in policy-map class configuration mode. To remove a previously set DSCP value, use the no form of this command.

set dscp [tunnel] dscp-value

no set dscp [tunnel] dscp-value

Syntax Description

tunnel

(Optional) Sets the DSCP on the outer IP header. This command is available for IPSec in the egress direction.

dscp-value

Number from 0 to 63 that sets the DSCP value. Reserved keywords can be specified instead of numeric values. Table 1 describes the reserved keywords.

Command Default

No default behavior or values

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.8.0

The tunnel keyword is supported for QoS in a Multicast Virtual Private Network (mVPN) enabled network that requires both conditional and unconditional marking of DSCP bits on the tunnel header.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

After the DSCP bit is set, other quality-of-service (QoS) services can then operate on the bit settings.

Conditional marking marks the DSCP values on the tunnel header as a policer action. Unconditional marking marks the DSCP tunnel as a policy action. Both conditional and unconditional markings are supported only in the ingress direction.

The network gives priority (or some type of expedited handling) to marked traffic. Typically, you set the DSCP value at the edge of the network (or administrative domain); data then is queued based on the DSCP value. Modified Deficit Round Robin (MDRR) can speed up handling for high DSCP traffic at congestion points. Weighted Random Early Detection (WRED) ensures that high DSCP traffic has lower loss rates than other traffic during times of congestion.

Reserved keywords can be specified instead of numeric values. Table 1 describes the reserved keywords.

Task ID

Task ID

Operations

qos

read, write

Examples

In the following example, the DSCP ToS byte is set to 8 in the policy map called policy1. All packets that satisfy the match criteria of class1 are marked with the DSCP value of 8. The network configuration determines how packets are marked.

RP/0/0/CPU0:router (config)# policy-map policy1 
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# set dscp 8
  

Related Commands

Command

Description

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

service-policy (interface)

Attachs a policy map to an input interface or output interface to be used as the service policy for that interface.  

set precedence

Sets the precedence value in the IP header.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

set fr-de

To change the discard eligible (DE) bit setting in the address field of a Frame Relay frame to 1 for all traffic leaving an interface, use the set fr-de command in policy map configuration mode. To remove the DE bit setting, use the no form of this command.

set fr-de [fr-de-bit-value]

no set fr-de [fr-de-bit-value]

Syntax Description

not

(Optional) Negates the specified match result.

fr-de-bit-value

(Optional) Specifies the Frame Relay DE bit. Value can be 0 or 1. Value can be 1.

Command Default

The default value is 0.

Command Modes

Policy map configuration

Command History

Release

Modification

Release 3.8.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

To disable this command in a traffic policy, use the no set fr-de command in policy map configuration mode of the traffic policy.

If the DE bit is already set to 1, no changes are made to the frame.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to set the DE bit using the set fr-de command in the traffic policy. The router sets the DE bit of outbound packets belonging to the ip-precedence class.

RP/0/0/CPU0:router(config)# class-map ip-precedence
RP/0/0/CPU0:router(config-cmap)# match precedence 0 1
RP/0/0/CPU0:router(config-cmap)# exit
RP/0/0/CPU0:router(config)# policy-map set-de
RP/0/0/CPU0:router(config-pmap)# class ip-precedence
RP/0/0/CPU0:router(config-pmap-c)# set fr-de 1
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit
RP/0/0/CPU0:router(config)# interface serial 1/0/0
RP/0/0/CPU0:router(config-if)# no ip address
RP/0/0/CPU0:router(config-if)# encapsulation frame-relay
RP/0/0/CPU0:router(config-if)# interface serial 1/0/0.1
RP/0/0/CPU0:router(config-subif)# ip address 10.1.1.1 255.255.255.252
RP/0/0/CPU0:router(config-subif)# no ip directed-broadcast
RP/0/0/CPU0:router(config-subif)# service-policy output set-de
  

Related Commands

Command

Description

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

set mpls experimental

To set the experimental (EXP) value of the Multiprotocol Label Switching (MPLS) packet topmost or imposition labels, use the set mpls experimental command in policy map configuration mode. To leave the EXP value unchanged, use the no form of this command.

set mpls experimental { imposition | topmost } exp-value

no set mpls experimental { imposition | topmost } exp-value

Syntax Description

imposition

Specifies to set the EXP value of the imposition label.

topmost

Specifies to set the EXP value of the topmost label.

exp-value

Value of the MPLS packet label. Range is 0 to 7.

Command Default

No MPLS experimental value is set

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.3.0

Added the imposition keyword and changed overall command name from set mpls experimental topmost to set mpls experimental.

Release 3.4.0

Added the range for the exp-value argument.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

After the MPLS experimental bits are set, other QoS services such as Modified Deficit Round Robin (MDRR) and Weighted Random Early Detection (WRED) then operate on the bit settings.

The network gives priority (or some type of expedited handling) to the marked traffic through the application of MDRR or WRED at points downstream in the network. Typically, the MPLS experimental value is set at the edge of the network (or administrative domain) and queueing is acted on it thereafter. MDRR can speed up handling for high-priority traffic at congestion points. WRED ensures that high-priority traffic has lower loss rates than other traffic during times of congestion.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to set the MPLS experimental to 5 for packets that match access list 101:

RP/0/0/CPU0:router(config)# class-map class1
RP/0/0/CPU0:router(config-cmap)# match access-group ipv4 acl101
RP/0/0/CPU0:router(config-cmap)# exit

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# set mpls experimental  imposition 5
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit

RP/0/0/CPU0:router(config)# interface  gigabitithernet 0/3/0/2
RP/0/0/CPU0:router(config-if)# service-policy  input policy1
  

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

service-policy (interface)

Attachs a policy map to an input interface or output interface to be used as the service policy for that interface.  

set precedence

To set the precedence value in the IP header, use the set precedence command in policy map class configuration mode. To leave the precedence value unchanged, use the no form of this command.

set precedence [tunnel] value

no set precedence [tunnel] value

Syntax Description

tunnel

(Optional) Sets the IP precedence on the outer IP header. This command is available on Layer 3 interfaces in the ingress direction.

value

Number or name that sets the precedence bits in the IP header. Range is from 0 to 7. Reserved keywords can be specified instead of numeric values. Table 1 describes the reserved keywords.

Command Default

Marking is not configured.

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.8.0

The tunnel keyword is supported for QoS in a Multicast Virtual Private Network (mVPN) enabled network that requires both conditional and unconditional marking of precedence bits on the tunnel header.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Precedence can be set using a number or corresponding name. After IP Precedence bits are set, other QoS services such as Modified Deficit Round Robin (MDRR) and Weighted Random Early Detection (WRED) then operate on the bit settings.

Conditional marking marks the precedence values on the tunnel header as a policer action. Unconditional marking marks the precedence tunnel as a policy action. Both conditional and unconditional markings are supported only in an ingress direction. The tunnel keyword is available on Layer 3 interfaces in the ingress direction.

The network gives priority (or some type of expedited handling) to the marked traffic through the application of MDRR or WRED at points downstream in the network. IP precedence can be set at the edge of the network (or administrative domain) and have queueing act on it thereafter. MDRR can speed handling for high-precedence traffic at congestion points. WRED ensures that high-precedence traffic has lower loss rates than other traffic during times of congestion.

The mapping from keywords such as 0 (routine) and 1 (priority) to a precedence value is useful only in some instances. That is, the use of the precedence bit is evolving. You can define the meaning of a precedence value by enabling other features that use the value. In the case of high-end Internet QoS, IP precedences can be used to establish classes of service that do not necessarily correspond numerically to better or worse handling in the network.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example shows how to set the IP precedence to 5 (critical) for packets that match the access control list named customer1:

RP/0/0/CPU0:router(config)# class-map class1
RP/0/0/CPU0:router(config-cmap)# match access-group ipv4 customer1
RP/0/0/CPU0:router(config-cmap)# exit

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# set precedence 5
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit

RP/0/0/CPU0:router(config)# interface gigabitethernet 0/1/0/9
RP/0/0/CPU0:router(config-if)# service-policy output policy1
  

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

service-policy (interface)

Attachs a policy map to an input interface or output interface to be used as the service policy for that interface.  

set qos-group

To set the quality of service (QoS) group identifiers on packets, use the set qos-group command in policy map class configuration mode. To leave the QoS group values unchanged, use the no form of this command.

set qos-group qos-group-value

no set qos-group qos-group-value

Syntax Description

qos-group-value

QoS group ID. An integer from 0 to 31, to be marked on the packet.

Command Default

No group ID is specified.

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The set qos-group command associates a QoS group ID with a packet. After the QoS group ID is set, other QoS services, such as Modified Deficit Round Robin (MDRR) and Weighted Random Early Detection (WRED), can operate on the QoS group setting.

The QoS group setting is limited in scope to the local router. Typically, the QoS group is set on the local router and used in conjunction with WRED or MDRR to give differing levels of service based on the group identifier.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example sets the QoS group to 5 for packets that match the MPLS experimental bit 1:

RP/0/0/CPU0:router(config)# class-map class1
RP/0/0/CPU0:router(config-cmap)# match mpls experimental topmost 1
RP/0/0/CPU0:router(config-cmap)# exit

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# set qos-group 5
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit

RP/0/0/CPU0:router(config)# interface pos 0/7/0/0
RP/0/0/CPU0:router(config-if)# service-policy input policy1
  

Related Commands

Command

Description

class-map

Defines a traffic class and the associated rules that match packets to the class.  

match dscp

Identifies specific IP differentiated services code point (DSCP) values as match criteria for a class map.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

service-policy (interface)

Attachs a policy map to an input interface or output interface to be used as the service policy for that interface.  

shape average

To shape traffic to the indicated bit rate according to the algorithm specified, use the shape average command in policy map class configuration mode. To remove traffic shaping, use the no form of this command.

shape average { percent percentage | rate [units] }

no shape average { percent percentage | rate [units] }

Syntax Description

percent percentage

Specifies the interface bandwidth in percentage. Values can be from 1 to 100.

rate

Average shaping rate in the specified units. Values can be from 1 to 4294967295. For 16 kbps granularity on 2.5 Gbps IP Services Engine (Engine 3) line cards, the maximum shape rate is 1.05 gbps.

units

(Optional) Units for the bandwidth. Values can be:

  • bps—bits per second (default)
  • gbps—gigabits per second
  • kbps—kilobits per second
  • mbps—megabits per second

Command Default

units: bps

Command Modes

Policy map class configuration

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.3.0

The units and burst-units arguments were added.

Release 3.3.1

Minimum rate value changed from 128 kbps to 256 kbps.

Release 3.4.0

The burst-size option was removed.

Release 3.9.0

The granularity of the rates specified was changed from 64 kbps to 8 kbps.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

When you use the shape average command, egress shaping is done at the Layer 2 level and includes the Layer 2 header in the rate calculation. Ingress shaping is done at the Layer 3 level and does not include the Layer 2 header in the rate calculation. Shaping is performed in multiples of 256 kbps, the minimum shaping rate.

When using this command, egress and ingress shaping is performed in multiples of 8 kbps on the Layer 3 level.

Line card Type

Ingress Granularity

Egress Granularity

2.5 Gbps IP Services Engine (Engine 3)**Exceptions: 1-Port OC-48c POS ISE                         4-Port OC-12c POS ISE

16 kbps64 kbps64 kbps

16 kbps64 kbps64 kbps

10 Gbps IP Services Engine (Engine 5)

32 kbps

32 kbps

Multirate 10G IP Services Engines (Engine 5+)

32 kbps

8 kbps

For shape average commands in the child policy, the reference used for percentage parameters is relative to the maximum rate of the parent. If shaping or policing is not configured on the parent, then the parent inherits the interface rate.

For bundled interfaces, shape average can be configured only as a percentage.

If you have both shape and bandwidth configured for a class, ensure that the shape percent value is always greater than the percent value for bandwidth.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example sets traffic shaping to 50 milliseconds:

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# shape average percent 50
  

The following example shows how to set traffic shaping to 5,000,000 kbps:

RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# shape average 5000000 kbps
  

show controllers egressq enaq location

To display information about QoS queue fragmentation on a node, use the show controllers egressq enaq location command in EXEC mode.

show controllers egressq enaq location node-id

Syntax Description

node-id

Specifies the node in the rack/slot/module notation.

Command Default

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

When policies are frequently added and removed in large-scale configurations, the line card might not have enough free contiguous QoS queues to accommodate a new policy—even though there are enough free queues on the line card. Use this command to determine the number of occupied (used/enabled) QoS queues on a node and to see where the fragments are.

QoS queues are automatically defragmented unless the hw-module qos queue-auto-defrag disable location command is configured. You can manually defragment QoS queues using the hw-module queue-defrag location command.

Task ID

Task ID

Operations

interface

read

drivers

read

Examples

The following example displays information about QoS queue fragmentation on location 0/1/CPU0. There are 12 enabled (occupied/used) QoS queues on the node. Between queue number 7 and queue number 12, there is a gap; this is a fragment of four unoccupied queues.

There are 4096 QoS queues on 2.5 Gbps IP Services Engine (Engine 3) line cards and 8192 QoS queues on 10 Gbps IP Services Engine (Engine 5) line cards. For the purpose of this example, if there were 16 total queues on this line card and a new policy needed five free contiguous queues, the system would display an error because there are only four free contiguous queues.

RP/0/0/CPU0:router# show controllers egressq enaq location 0/1/CPU0

Wed Oct  7 21:57:34.531 eastern
Total enabled queues:12 
Total allocated ports:5

Queue#  Head    Tail    Length  Threshold       Type    Red avg Port/Slot
                        pkts    index

===========================================================================

0       0       0       0       63              oq      0       0
1       0       0       0       63              oq      0       0
2       0       0       0       63              oq      0       1
3       0       0       0       63              oq      0       1
4       0       0       0       63              oq      0       2
5       0       0       0       63              oq      0       2
6       0       0       0       63              oq      0       3
7       0       0       0       63              oq      0       3
12      0       0       0       63              oq      0       5
13      0       0       0       1               oq      0       5
14      0       0       0       63              oq      0       5
15      0       0       0       63              oq      0       5
  

The following example displays information for the same node after it has been defragmented.

RP/0/0/CPU0:router# show controllers egressq enaq location 0/1/CPU0

Wed Oct  7 22:04:45.420 eastern
Total enabled queues:12
Total allocated ports:5

Queue#  Head    Tail    Length  Threshold       Type    Red avg Port/Slot
                        pkts    index

===========================================================================

0       0       0       0       63              oq      0       0
1       0       0       0       63              oq      0       0
2       0       0       0       63              oq      0       1
3       0       0       0       63              oq      0       1
4       0       0       0       63              oq      0       2
5       0       0       0       63              oq      0       2
6       0       0       0       63              oq      0       3
7       0       0       0       63              oq      0       3
8       0       0       0       63              oq      0       5
9       0       0       0       1               oq      0       5
10      0       0       0       63              oq      0       5
11      0       0       0       63              oq      0       5
  

Related Commands

Command

Description

hw-module qos queue-auto-defrag disable location

Disables automatic QoS queue defragmentation on a node.  

hw-module queue-defrag location

Manually defragment the QoS queues on a node.  

show controllers sanity

To display information about sanity checking of ingress and egress queueing ASICs, use the show controllers sanity command in EXEC mode.

show controllers { egressq | ingressq } sanity location node-id

Syntax Description

egressq

Displays egress queueing ASIC sanity configuration.

ingressq

Dsiplays ingress queuing ASIC sanity configuration.

location

Displays sanity checking configuration for a designated node.

node-id

Node for which sanity checking information is to be displayed. The node-id argument is entered in the rack/slot/module notation.

Command Default

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 4.0.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

This command is supported on 10 Gbps IP Services Engine (Engine 5) line cards and Multirate 10G IP Services Engines (Engine 5+) line cards only.

Task ID

Task ID

Operation

sonet-sdh OR

dwdm OR

interface

read

read

read

drivers

read

Examples

The following example demonstrates how to display information on the sanity checking of the ingress queueing ASIC on location 0/2/CPU0:

RP/0/0/CPU0:router# show controllers ingressq sanity location 0/2/CPU0

Wait Timer:                     60
Buffer Threshold:               5
Sanity Action Set:              Recarve

The following table describes the significant fields shown in the display.

Table 3 show controllers sanity Field Descriptions

Field

Description

Wait Timer

Indicates the time lapse, in seconds, between successive sanity checks.

Buffer Threshold

Indicates the remaining buffer threshold value, as a percentage. A warning will be printed on the console when the buffer threshold value is reached.

Sanity Action Set

Indicates the action to be performed when the buffer has depleted completely.

  • recarve—Recarve performed as recovery.
  • none—No action performed as recovery.
  • reload—Reload of line card performed as recovery.
  • pcds—(Default) No action performed as recovery. Equivalent to the user configurable action, none.

Related Commands

Command

Description

hw-module sanity

Configures sanity checking of ingress and egress queueing ASICs.  

show hw-module multicast qos

To display the multicast QoS group information, use the show hw-module multicast qos command in EXEC mode.

show hw-module multicast qos [ group-info [port] location node-id | queue-info [ type instance ] location node-id | wred location node-id ]

Syntax Description

group-info

(Optional) Displays multicast QoS group information.

port

(Optional) Port number. Range is from 0 to 15.

location node-id

(Optional) Specifies multicast QoS group information for a designated node. The node-id argument is entered in the rack/slot/module notation.

queue-info

(Optional) Displays multicast QoS group queue information.

type

(Optional) Interface type. For more information, use the question mark (?) online help function.

instance

(Optional) Either a physical interface instance or a virtual interface instance:

  • Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.
    • rack: Chassis number of the rack.
    • slot: Physical slot number of the line card.
    • module: Module number. A physical layer interface module (PLIM) is always 0.
    • port: Physical port number of the interface.
    Note   

    In references to a Management Ethernet interface located on a Route Processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0. Example: interface MgmtEth0/RP1/CPU0/0.

  • Virtual interface instance. Number range varies depending on interface type.

For more information about the syntax for the router, use the question mark (?) online help function.

wred

(Optional) Displays multicast QoS Weighted Random Early Detection (WRED) information.

Command Default

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Release 3.4.0

Command syntax was changed from show hw-module qos multicast to show hw-module multicast qos.

Release 3.6.0

The wred keyword was added.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

If you do not enter a node-id argument, all configured interfaces are displayed.

Task ID

Task ID

Operations

multicast

read

Examples

The following sample output shows how to display QoS information about for Packet-over-SONET/SDH (POS) interface 0/7/0/3:

RP/0/0/CPU0:router# show hw-module multicast qos

POS 0/7/0/3 output: p1
Class c1
Matched        (packets/bytes) : 0/0
Marked (packets/bytes) : 0/0
  

The following table describes the significant fields shown in the display.

Table 4 show hw-module multicast qos Field Descriptions

Field

Description

POS 0/7/0/3 output: p1

POS output interface for policy p1.

Matched (packets/bytes): 0/0

Class c1 of policy p1 displays no matched packets and bytes.

Marked (packets/bytes): 0/0

Class c1 of policy p1 displays no marked packets and bytes.

Matched (packets/bytes): 10/1320

Class c2 of policy p1 displays 10 matched packets and 1320 matched bytes.

Related Commands

Command

Description

hw-module qos multicast

Enables multicast egress quality of service (QoS) on a node.  

show policy-map interface

To display policy configuration information for all classes configured for all service policies on the specified interface, use the show policy-map interface command in EXEC mode.

show policy-map interface type interface-path-id [ input | output [ member type interface-path-id ] ]

Syntax Description

type

Interface type. For more information, use the question mark (?) online help function.

interface-path-id

Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.

  • rack—Chassis number of the rack.
  • slot—Physical slot number of the line card.
  • module—Module number. A physical layer interface module (PLIM) is always 0.
  • port—Physical port number of the interface.
Note   

In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric (RP0 or RP1) and the module is CPU0.

Example: interface MgmtEth0/RP1/CPU0/0.

For more information about the syntax for the router, use the question mark (?) online help function.

input

(Optional) Displays per class statistics on inbound traffic for the specified policy map and interface.

output

(Optional) Displays per class statistics on outbound traffic for the specified policy map and interface.

member

(Optional) Specifies the bundle member’s interface.

Command Default

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.3.0

The combined, hw, and sw keywords were added.

Release 3.4.0

The combined, hw, and sw keywords were deleted.

The pre-decrypt, post-decrypt, pre-encrypt, and post-encrypt keywords were added.

Release 3.4.1

The combined, hw, and sw keywords were added.

Release 3.5.0

The show policy-map interface command output was updated to show when a policy is suspended on a multilink or T3 interface.

The pre-decrypt, post-decrypt, post-encrypt, and pre-decrypt keywords were removed.

Release 3.6.0

The combined, hw, and sw keywords were removed.

The member type interface-path-id keyword and arguments were added.

Release 3.9.0

The show policy-map interface command output was updated to show IPHC statistics.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The show policy-map interface command displays the statistics for classes in the service policy attached to an interface.

Task ID

Task ID

Operations

qos

read

Examples

The following sample output shows how to display policy statistics information for all classes on the TenGigE interface 0/6/1/0 that are in the output and input direction:

RP/0/0/CPU0:router# show policy-map interface tengige 0/6/1/0

TenGigE0/6/1/0 input: policy1

Class class1
  Classification statistics          (packets/bytes)     (rate - kbps)
    Matched             :                   0/0                    0
    Transmitted         :                   0/0                    0
    Total Dropped       :                   0/0                    0
  Policing statistics                (packets/bytes)     (rate - kbps)
    Policed(conform)    :                   0/0                    0
    Policed(exceed)     :                   0/0                    0
    Policed(violate)    :                   0/0                    0
    Policed and dropped :                   0/0
  Queueing statistics
    Queue ID                             : 44
    Taildropped(packets/bytes)           : 0/0
Class class-default
  Classification statistics          (packets/bytes)     (rate - kbps)
    Matched             :                   0/0                    0
    Transmitted         :                   0/0                    0
    Total Dropped       :                   0/0                    0
  Queueing statistics
    Queue ID                             : 44
    High watermark  (bytes)/(ms)         : 0/0
    Inst-queue-len  (bytes)/(ms)         : 0/0
    Avg-queue-len   (bytes)/(ms)         : 0/0
    Taildropped(packets/bytes)           : 0/0

TenGigE0/6/1/0 output: policy4

Class class1
  Classification statistics          (packets/bytes)     (rate - kbps)
    Matched             :                   0/0                    0
    Transmitted         :                   0/0                    0
    Total Dropped       :                   0/0                    0
  Policing statistics                (packets/bytes)     (rate - kbps)
    Policed(conform)    :                   0/0                    0
    Policed(exceed)     :                   0/0                    0
    Policed(violate)    :                   0/0                    0
    Policed and dropped :                   0/0
  Queueing statistics
    Queue ID                             : 51
    Taildropped(packets/bytes)           : 0/0
Class class-default
  Classification statistics          (packets/bytes)     (rate - kbps)
  Classification statistics          (packets/bytes)     (rate - kbps)
    Matched             :                   0/0                    0
    Transmitted         :                   0/0                    0
    Total Dropped       :                   0/0                    0
  Queueing statistics
    Queue ID                             : 51
    High watermark  (bytes)/(ms)         : 0/0
    Inst-queue-len  (bytes)/(ms)         : 0/0
    Avg-queue-len   (bytes)/(ms)         : 0/0
    Taildropped(packets/bytes)           : 0/0
  

The following sample output shows how to display policy statistics information for all classes on the Serial interface 0/0/3/0/3:0 that are in the output direction:

RP/0/0/CPU0:router# show policy-map interface Serial0/0/3/0/3:0 output

show policy-map int  Serial0/0/3/0/3:0  output
Mon May 18 22:06:14.698 UTC 
Serial0/0/3/0/3:0 output: p1
Class class-default
  Classification statistics          (packets/bytes)     (rate - kbps)
    Matched             :                   0/0                    0
    Transmitted         :                   0/0                    0
    Total Dropped       :                   0/0                    0
  Queueing statistics
    Queue ID                             : 0
    High watermark  (Unknown)            : 0
    Inst-queue-len  (packets)            : 0
    Avg-queue-len   (packets)            : 0
    Taildropped(packets/bytes)           : 0/0
  Compression Statistics
    Header ip rtp
    Sent Total       (packets)           : 880
    Sent Compressed  (packets)           : 877
    Sent full header (packets)           : 342
    Saved            (bytes)             : 31570
    Sent             (bytes)             : 24750
    Efficiency improvement factor        : 2.27
  

Note


In Classification Statistics, the total dropped packets are calculated based on the total number of policed-dropped packets and the queueing tail dropped packets. Currently, for ATM interfaces in the egress direction, the queueing tail dropped packets are not added to the classification total dropped packets.


The following table describes the significant fields shown in the display.

Table 5 show policy-map interface Field Descriptions

Field

Description

Classification statistics

Matched

Number of packets or bytes that matched this class.

Transmitted

Number of packets or bytes transmitted for this class.

Total Dropped

Number of packets or bytes dropped for this class.

Policing statistics

Policed(conform)

Number of packets or bytes that conformed to the police rate for this class.

Policed(exceed)

Number of packets or bytes that exceeded the police rate for this class.

Policed(violate)

Number of packets or bytes that violated the police rate for this class.

Policed and dropped

Number of packets or bytes dropped by the policer of this class.

Queueing statistics

Queue ID

Queue number of the packet in this class.

High watermark (bytes)/(ms)

Maximum length of the queue.

Inst-queue-len (bytes)/(ms)

Instantaneous length of the queue.

Avg-queue-len (bytes)/(ms)

Average length of the queue.

Taildropped (bytes)

Number of bytes taildropped for this queue.

Compression Statistics

Sent Total

Total number of packets sent.

Sent Compressed

Number of compressed packets sent.

Sent full header

Number of packets sent with a full header.

Saved

Number of bytes saved.

Sent

Number of bytes sent.

Efficiency improvement factor

Ratio of the packet’s original full size to the packet’s compressed size.

The following example shows sample output shows when a policy has been suspended on a multilink interface:

RP/0/0/CPU0:router# show policy-map interface Multilink 0/2/0/0/201 input

Multilink0/2/0/0/201 input: ps1 suspended by EA: No bandwidth 
  

show policy-map targets

To display information about the interfaces on which policy maps are applied, use the show policy-map targets command in EXEC mode.

show policy-map targets [ location node-id | pmap-name name | type performance-traffic [ location node-id | pmap-name name ] | type qos [ location node-id | pmap-name name ] ]

Syntax Description

location node-id

(Optional) Displays information about the interfaces on which policy maps are applied for the specified location. The node-id argument is entered in the rack/slot/module notation.

pmap-name name

(Optional) Displays information about the interfaces on which the specified policy map is applied.

type performance-traffic

(Optional) Displays information about the interfaces on which Realtime Application Flow Monitoring policy maps are applied.

type qos

(Optional) Displays information about the interfaces on which QoS policy maps are applied. This is the default type.

Command Default

The default QoS policy type is QoS.

Command Modes

EXEC

Command History

Release

Modification

Release 3.8.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

For a short period of time while a QoS policy is being modified, no QoS policy is active on the interface. For these reasons, modify QoS policies that affect the fewest number of interfaces at a time. Use the show policy-map targets command to identify the number of interfaces that will be affected during policy map modification.

Task ID

Task ID

Operations

qos

read

Examples

In this example, the Gigabit Ethernet interface 0/1/0/0 has one policy map attached as a main policy. Outgoing traffic on this interface will be affected if the policy is modified:

RP/0/0/CPU0:router# show policy-map targets

Fri Jul 16 16:38:24.789 DST
1) Policymap: policy1    Type: qos
     Targets (applied as main policy):
       GigabitEthernet0/1/0/0 output
     Total targets: 1

     Targets (applied as child policy):
     Total targets: 0
  

Related Commands

Command

Description

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.  

show qos acl-deny enable

To display the acl-deny information for a particular location, use the show qos acl-deny enable command in the root configuration mode. To disable this functionality, use the no form of this command.

show qos acl-deny enable [ location node-id ]

no show qos acl-deny enable [ location node-id ]

Syntax Description

location node-id

Displays the acl-deny function on a node. The node-id argument is entered in the rack/slot/module notation.

Command Default

No default behavior or values

Command Modes

Root configuration

Command History

Release

Modification

Release 3.6.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

This command displays the administration and operational states of the acl-deny function. The operational state dictates the current operational behavior while the administration state dictates the operational state after the next line card (LC) reload.

Task ID

Task ID

Operations

qos-ea

write

Examples

The following example shows how to display an acl-deny function on 0/0/CPU0:

RP/0/0/CPU0:router# F14-01
RP/0/0/CPU0:router# show qos acl-deny location 0/0/CPU0
  

show qos if-ref-bw

To display the Quality of Service (QoS) reference bandwidth, use the show qos if-ref-bw command in EXEC mode.

show qos if-ref-bw location node-id

Syntax Description

location

Configures node for which the QoS reference bandwidth is to be displayed.

node-id

Node for which the reference bandwidth is to be displayed. The node-id argument is entered in the rack/slot/module notation.

Command Default

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 4.0.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The QoS reference bandwidth is used for the conversion of time based values to equivalent packet based interpretation.

Task ID

Task ID

Operation

qos

read

Examples

The following example demonstrates how to display the QoS reference bandwidth on location 0/2/CPU0. In this example, the command output indicates that the interface reference bandwidth has been enabled as the QoS reference bandwidth:

RP/0/0/CPU0:router# show qos if-ref-bw location 0/2/CPU0

QOS reference BW configuration
Admin State:    Interface reference BW enable.
Oper State:     Interface reference BW enable.
  

The following table describes the significant fields shown in the display.

Table 6 show qos if-ref-bandwidth Field Descriptions

Field

Description

Admin State

Most recently configured QoS reference bandwidth

Oper State

QoS reference bandwidth currently applied to hardware

Related Commands

Command

Description

hw-module sanity

Configures sanity checking of ingress and egress queueing ASICs.  

show qos interface

To display QoS information for a specific interface, use the show qos interface command in EXEC mode.

show qos interface type interface-path-id { input | output } [ location node-id ]

Syntax Description

type

Interface type. For more information, use the question mark (?) online help function.

interface-path-id

Either a physical interface instance or a virtual interface instance as follows:

  • Physical interface instance. Naming notation is rack/slot/module/port and a slash between values is required as part of the notation.
    • rack : Chassis number of the rack.
    • slot : Physical slot number of the modular services card or line card.
    • module : Module number. A physical layer interface module (PLIM) is always 0.
    • port : Physical port number of the interface.
    Note   

    In references to a Management Ethernet interface located on a route processor card, the physical slot number is alphanumeric ( RSP0 RP0 or RP1 ) and the module is CPU0. Example: interface MgmtEth0/ RSP0 RP1 /CPU0/0.

  • Virtual interface instance. Number range varies depending on interface type.

For more information about the syntax for the router, use the question mark (?) online help function.

input

Attaches the specified policy map to the input interface.

output

Attaches the specified policy map to the output interface.

location node-id

(Optional) Displays detailed QoS information for the designated node. The node-id argument is entered in the rack/slot/module notation.

Command Default

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.2

This command was introduced.

Release 3.4.0

The pre-decrypt , post-decrypt , pre-encrypt , and post-encrypt keywords were added for IPSec.

Release 3.5.0

The show qos interface command output was updated to show when a policy is suspended on a multilink or T3 interface.

The pre-decrypt , post-decrypt , post-encrypt , and pre-decrypt keywords were removed.

Release 3.6.0

The command output now includes the following:

  • User-configured values are shown in parentheses.
  • Guaranteed service rate value.
  • Weight for each class.

Release 3.9.0

Updated to support three-level hierarchical policy maps.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The show qos interface command displays configuration for all classes in the service policy that is attached to an interface.

Use this command to check the actual values programmed in the hardware from the action keywords in the police rate command.

Task ID

Task ID

Operations

qos

read

Examples

The following sample output shows the L2VPN QoS information on a GigabitEthernet interface:

RP/0/0/CPU0:router# show qos interface GigabitEthernet 0/2/0/0 output

NOTE:- Configured values are displayed within parentheses
Interface GigE0_2_0_0  --   output policy
Total number of classes:   3
-------------------------------------------------------
Level1 class                      =   c1
Egressq Queue ID                  =   25 (LP queue)
Queue belongs to Group            =   9
Queue Max. BW.                    =   999936 kbps (10 %)
Queue Min. BW.                    =   0 kbps (default)
Weight                            =   10 (BWR not configured)
Shaper burst                      =   31248 bytes
Guaranteed service rate           =   1000000 kbps
TailDrop Threshold                =   12500000 bytes / 100 ms (default)
Policer not configured for this class
WRED not configured for this class

Level1 class                      =   c2
Egressq Queue ID                  =   26 (LP queue)
Queue belongs to Group            =   9
Queue Max. BW.                    =   10000128 kbps (default)
Queue Min. BW.                    =   2000128 kbps (20 %)
Weight                            =   10 (BWR not configured)
Guaranteed service rate           =   4666666 kbps
TailDrop Threshold                =   58333325 bytes / 100 ms (default)
Policer not configured for this class
WRED not configured for this class

Level1 class                      =   class-default
Egressq Queue ID                  =   9 (Group default LP queue)
Queue belongs to Group            =   9
Queue Max. BW.                    =   10000128 kbps (default)
Queue Min. BW.                    =   0 kbps (default)
Weight                            =   10 (BWR not configured)
Guaranteed service rate           =   1000000 kbps
TailDrop Threshold                =   12500000 bytes / 100 ms (default)

Policer slot #                    =   224
Policer committed rate            =   1000000 kbps (10 %)
Policer conform burst             =   2097120 bytes (default)
Policer conform action            =   Just TX
Policer exceed  action            =   DROP PKT
WRED not configured for this class
  

The following table describes the significant fields shown in the display.

Table 7 show QoS interface Field Descriptions

Field

Description

LEVEL1 class

Level 1 class identifier in hexadecimal format.

class name

Name that was assigned to this class with the class command.

Queue ID

Queue identifier.

Queue Min. BW

Minimum bandwidth allowed on this queue.

Queue Max. BW

Maximum bandwidth allowed on this queue.

Queue Max. Burst

Maximum burst size allowed on this queue.

Weight

Weight assigned to the specified class.

If no weight has been assigned, the show policy-map interface command output shows “No explicit weight assigned for this class.”

Queue Limit

Configured queue limit.

Policer average

Average Committed Information Rate (CIR) in bits per second (bps), gigabits per second (gbps), kilobits per second (KBits), or megabits per second (mbps).

Policer conform burst

Configured burst size, expressed in bytes, gigabytes (GB), kilobytes (KB), megabytes (MB), milliseconds (ms), or microseconds (us).

Policer excess burst

Programmed burst size for conforming cells, expressed in bytes, gigabytes (GB), kilobytes (KB), megabytes (MB), milliseconds (ms), or microseconds (us).

Policer conform action

Policer conform action.

Policer exceed action

Policer exceed action.

Policer violate

Indicates whether the device supports excess burst size configuration. In the example, excess burst size configuration is supported for transmitted cells only.

Policer exceed action value

Policer exceed action value.

Policer violate action

Policer violate action.

The following example shows a sample display of three-level QoS policy configuration information on a GigabitEthernet interface.

RP/0/0/CPU0:router# show qos interface gigabitethernet 0/0/0/0 output

Interface GigabitEthernet0_0_0_0  --   Direction: output
Policy                 :   3level-p
Total number of classes:   5
--------------------------------------------------------
LEVEL1 class: classid    =   0x1
class name               =   class-default
Queue Max. BW.           =   20 mbits/sec (19968 kbps)

    LEVEL2 class: classid    =   0x2
    class name               =   prec1
    queue ID                 =   6
    port ID                  =   0
    Queue Max. BW.           =   10 mbits/sec (9984 kbps)
    Queue Limit              =   1024 packets (1024 pkts)

           LEVEL3 class: classid    =   0x3
           class name               =   qosgrp2
           Policer average          = 3 mbits/sec (3008 kbps)
           Policer conform action   = Just TX
           Policer exceed action    = DROP PKT

           LEVEL3 class: classid    =   0x4
           class name               =   class-default
           Policer average          = 2 mbits/sec (2000 kbps)
           Policer conform action   = Just TX
           Policer exceed action    = DROP PKT

    LEVEL2 class: classid    =   0x5
    class name               =   class-default
    queue ID                 =   7
    port ID                  =   0
    Weight                   =   1
    Queue Limit              =   1024 packets (1024 pkts)
  

The following table describes the significant fields shown in the display.

Table 8 show QoS interface Field Descriptions (three-level policy)

Field

Description

LEVEL1 class

Level 1 class identifier in hexadecimal format.

LEVEL2 class

Level 2 class identifier in hexadecimal format.

LEVEL3 class

Level 3 class identifier in hexadecimal format.

class name

Name that was assigned to this class with the class command.

Queue ID

Queue identifier.

Queue Min. BW

Minimum bandwidth allowed on this queue.

Queue Max. BW

Maximum bandwidth allowed on this queue.

Queue Max. Burst

Maximum burst size allowed on this queue.

Weight

Weight assigned to the specified class.

If no weight has been assigned, the show policy-map interface command output shows “No explicit weight assigned for this class.”

Queue Limit

Configured queue limit.

Policer average

Average Committed Information Rate (CIR) in bits per second (bps), gigabits per second (gbps), kilobits per second (KBits), or megabits per second (mbps).

Policer conform burst

Configured burst size, expressed in bytes, gigabytes (GB), kilobytes (KB), megabytes (MB), milliseconds (ms), or microseconds (us).

Policer excess burst

Programmed burst size for conforming cells, expressed in bytes, gigabytes (GB), kilobytes (KB), megabytes (MB), milliseconds (ms), or microseconds (us).

Policer conform action

Policer conform action.

Policer exceed action

Policer exceed action.

Policer violate

Indicates whether the device supports excess burst size configuration. In the example, excess burst size configuration is supported for transmitted cells only.

Policer exceed action value

Policer exceed action value.

Policer violate action

Policer violate action.

show qos pol-gran location

To display policer granularity for a SPA Interface Processor, use the show qos pol-gran location command in EXEC mode.

show qos pol-gran location interface-path-id

Syntax Description

interface-path-id

Physical location of the Shared Interface Processor (SIP). Naming notation is rack/slot/module and a slash between values is required as part of the notation.

  • rack—Chassis number of the rack.
  • slot—Physical slot number of the modular services card or line card.
  • module—Module number. A physical layer interface module (PLIM) is always 0.

Command Default

No default behavior or values

Command Modes

EXEC

Command History

Release

Modification

Release 3.8.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

The show qos interface command displays policer granularity for a SPA Interface Processor and all of its installed SPAs. Use this command to verify the policer granularity configured using the hw-module qos pol-gran location command.

Task ID

Task ID

Operations

qos

read

Examples

The following sample output shows the configured (8 kbps) and default (64 kbps) policer granularity for the SIP at location 0/1/CPU0:

RP/0/0/CPU0:router# show qos pol-gran location 0/1/CPU0

QoS Policer Granularity Rate
Admin Value:     8 kbps
Oper Value:      64 kbps
  

The following table describes the significant fields shown in the display.

Table 9 show QoS pol-gran location Field Descriptions

Field

Description

Admin Value

Policer granularity configured using the hw-module qos pol-gran location command.

Oper Value

Default policer granularity for this SIP.

Related Commands

Command

Description

hw-module qos pol-gran location

Overrides the default policer granularity.  

switch-fabric service-policy

To configure a service policy for the switch fabric, use the switch-fabric service-policy command in global configuration mode. To remove a specified service policy from the switch fabric, use the no form of this command.

switch-fabric service-policy policy-map-name

no switch-fabric service-policy policy-map-name

Syntax Description

policy-map-name

Name of the predefined policy map to be used as a QoS policy. The name can be a maximum of 40 alphanumeric characters.

Command Default

No service policy is specified.

Command Modes

Global configuration

Command History

Release

Modification

Release 3.3.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

Task ID

Task ID

Operations

qos

read, write

Examples

The following example configures the service policy for policy map1.

RP/0/0/CPU0:router# configure
RP/0/0/CPU0:router(config)# switch-fabric service-policy map1
  

violate-action

To configure the action to take on packets that violate the rate limit, use the violate-action command in policy map police configuration mode. To remove a conform action from the policy-map, use the no form of this command.

violate-action drop

no violate-action drop

Syntax Description

drop

Drops the packet.

Command Default

No default behavior or values

Command Modes

Policy map police configuration

Command History

Release

Modification

Release 3.4.0

This command was introduced.

Usage Guidelines

To use this command, you must be in a user group associated with a task group that includes the proper task IDs. If you suspect user group assignment is preventing you from using a command, contact your AAA administrator for assistance.

For more information regarding the traffic policing feature refer to the police rate command.

The violate-action command can set the DSCP, the precedence, or the discard class for IP packets, and experimental and discard-class values for MPLS packets.

Task ID

Task ID

Operations

qos

read, write

Examples

In the following example for MPLS, traffic policing is configured to drop packets that violate the rate limit:

RP/0/0/CPU0:router(config)# class-map class1
RP/0/0/CPU0:router(config-cmap)# match mpls experimental topmost 0
RP/0/0/CPU0:router(config-cmap)# exit
RP/0/0/CPU0:router(config)# policy-map policy1
RP/0/0/CPU0:router(config-pmap)# class class1
RP/0/0/CPU0:router(config-pmap-c)# police rate 250 kbps burst 50 
RP/0/0/CPU0:router(config-pmap-c-police)# violate-action drop
RP/0/0/CPU0:router(config-pmap-c-police)# exit
RP/0/0/CPU0:router(config-pmap-c)# exit
RP/0/0/CPU0:router(config-pmap)# exit
RP/0/0/CPU0:router(config)# interface gigabitethernet 0/1/0/9
RP/0/0/CPU0:router(config-if) service-policy input policy1
  

Related Commands

Command

Description

conform-action

Configures the action to take on packets that conform to the rate limit.  

exceed-action

Configures the action to take on packets that exceed the rate limit.  

police rate

Configures traffic policing and enters policy map police configuration mode.  

policy-map

Creates or modifies a policy map that can be attached to one or more interfaces to specify a service policy.  

show policy-map interface

Displays policy configuration information for all classes configured for all service policies on the specified interface.