Cisco Nexus 1000V Quality of Service Configuration Guide, Release 4.2(1)SV2(2.1)
Monitoring QoS Statistics
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Monitoring QoS Statistics

Monitoring QoS Statistics

This chapter contains the following sections:

Information About QoS Statistics

Statistics are maintained for each policy, class action, and match criteria per interface. You can enable or disable the collection of statistics globally using the [no] qos statistics command. You can display statistics using the show policy-map interface command, and you can clear statistics based on an interface or policy map with the clear qos statistics command. Statistics are enabled by default and can be disabled globally.

Prerequisites for Monitoring QoS Statistics

You are logged in to the CLI in EXEC mode.

Enabling QoS Statistics

You can enable or disable QoS statistics for all interfaces on the device.


Note


By default, QoS statistics are enabled.


SUMMARY STEPS

    1.    switch# configure terminal

    2.    switch(config)# qos statistics

    3.    (Optional) switch(config)# show policy-map interface

    4.    (Optional) switch(config)# copy running-config startup-config


DETAILED STEPS
     Command or ActionPurpose
    Step 1switch# configure terminal 

    Enters global configuration mode.

     
    Step 2switch(config)# qos statistics 

    Enables QoS statistics on all interfaces.

     
    Step 3switch(config)# show policy-map interface  (Optional)

    Displays the status of the global statistics and the configured policy maps on all interfaces.

     
    Step 4switch(config)# copy running-config startup-config  (Optional)

    Saves the running configuration persistently through reboots and restarts by copying it to the startup configuration.

     

    This example shows how to enable QoS statistics:

    switch# configure terminal
    switch(config)# qos statistics
    switch(config)# show policy-map interface
    Global statistics status :   enabled
    
    Vethernet1
    
      Service-policy (qos) input:   policy1 
        policy statistics status:   enabled
    
        Class-map (qos):   class1 (match-all)
          1 packets 
          Match: access-group testacl1
          Match: packet length 3-6000
          set dscp af31 
    
        Class-map (qos):   class-default (match-any)
          1 packets 
    
      Service-policy (qos) output:   policy1 
        policy statistics status:   enabled
    
        Class-map (qos):   class1 (match-all)
          9 packets 
          Match: access-group testacl1
          Match: packet length 3-6000
          set dscp af31 
    
        Class-map (qos):   class-default (match-any)
          18645 packets 
    
    Vethernet2
    
      Service-policy (qos) output:   policy1 
        policy statistics status:   enabled
    
        Class-map (qos):   class1 (match-all)
          18636 packets 
          Match: access-group testacl1
          Match: packet length 3-6000
          set dscp af31 
    
        Class-map (qos):   class-default (match-any)
          19191 packets 
    
    Vethernet3
    
      Service-policy (qos) output:   policy1 
        policy statistics status:   enabled
    
        Class-map (qos):   class1 (match-all)
          9 packets 
          Match: access-group testacl1
          Match: packet length 3-6000
          set dscp af31 
    
        Class-map (qos):   class-default (match-any)
          18644 packets 
    
    Vethernet4
    
      Service-policy (qos) input:   1r2c 
        policy statistics status:   enabled
    
        Class-map (qos):   mat-dscp0 (match-all)
          568738560 packets 
          Match: dscp 0
          police cir 90 mbps bc 200 ms 
            conformed 37578738384 bytes, 0 bps action: set-dscp-transmit 10 
            violated 0 bytes, 0 bps action: drop 
    
      Service-policy (qos) output:   policy1 
        policy statistics status:   enabled
    
        Class-map (qos):   class1 (match-all)
          9 packets 
          Match: access-group testacl1
          Match: packet length 3-6000
          set dscp af31 
    
        Class-map (qos):   class-default (match-any)
          18642 packets 
    switch(config)# copy running-config startup-config

    Displaying QoS Statistics

    Before You Begin

    You know the interface for which statistics are needed.


    Note


    Statistics for individual interfaces are often the most useful.


    SUMMARY STEPS

      1.    switch# show policy-map [policy-map-name | interface [brief | ethernet interface_number | output type qos | port-channel number | vethernet interface_number | input type qos] | type qos]


    DETAILED STEPS
       Command or ActionPurpose
      Step 1switch# show policy-map [policy-map-name | interface [brief | ethernet interface_number | output type qos | port-channel number | vethernet interface_number | input type qos] | type qos] 

      Displays the specified statistics.

      To achieve the best result when your system has a large number of policies, use this command with specific arguments, such as specifying a particular interface or port channel.

      • Use the interface keyword with the following keywords to display the service policy on an interface:
        • brief—Displays a brief report of all policies attached to interfaces.
        • ethernet—Displays statistics for an Ethernet interface.
        • input type qos—Displays statistics for QoS input policies.
        • output type qos—Displays statistics for QoS output policies.
        • port-channel—Displays statistics for a port channel interface.
        • vethernet—Displays the statistics for a vEthernet interface.
      • Use the type qos keyword to display the type of policy map.
       

      This example shows how to display QoS statistics:

      switch (config)# show policy-map interface port-channel 1
      
      Global statistics status :   enabled
      
      port-channel1
      
        Service-policy (qos) input:   2rate3clr 
          policy statistics status:   enabled
      
          Class-map (qos):   class1 (match-all)
            14 packets 
            Match: access-group testacl1
            Match: packet length 3-6000
            police cir 300 kbps bc 200 ms pir 750 kbps be 200 ms 
              conformed 1260 bytes, 4384 bps action: set-cos-transmit 4 
              exceeded 0 bytes, 0 bps action: set dscp dscp table cir-markdown-map 
              violated 0 bytes, 0 bps action: set dscp dscp table pir-markdown-map 
      
      switch(config-if)# show policy-map interface vethernet 1
      
      
      Global statistics status :   enabled
      
      Vethernet1
      
        Service-policy (qos) input:   policy1 
          policy statistics status:   enabled
      
          Class-map (qos):   class1 (match-all)
            1 packets 
            Match: access-group testacl1
            Match: packet length 3-6000
            set dscp af31 
      
          Class-map (qos):   class-default (match-any)
            1 packets 
      
        Service-policy (qos) output:   policy1 
          policy statistics status:   enabled
      
          Class-map (qos):   class1 (match-all)
            9 packets 
            Match: access-group testacl1
            Match: packet length 3-6000
            set dscp af31 
      
          Class-map (qos):   class-default (match-any)
            19074 packets 
      

      Clearing QoS Statistics

      SUMMARY STEPS

        1.    switch # clear qos statistics [interface {ethernet interface_number | port-channel number | vethernet interface_number | output type qos | input type qos}]


      DETAILED STEPS
         Command or ActionPurpose
        Step 1switch # clear qos statistics [interface {ethernet interface_number | port-channel number | vethernet interface_number | output type qos | input type qos}]  

        Clears the specified QoS statistics.

         

        This example shows how to clear QoS statistics:

        switch(config)# clear qos statistics interface port-channel 1
        switch# show policy-map interface port-channel 1
        Global statistics status : enabled
        port-channel1
        Service-policy (qos) input: 2rate3clr
        policy statistics status: enabled
        Class-map (qos): class1 (match-all)
        0 packets
        Match: access-group testacl1
        Match: packet length 3-6000
        police cir 300 kbps bc 200 ms pir 750 kbps be 200 ms
        conformed 0 bytes, 0 bps action: set-cos-transmit 4
        exceeded 0 bytes, 0 bps action: set dscp dscp table cir-markdown-map
        violated 0 bytes, 0 bps action: set dscp dscp table pir-markdown-map
        switch#

        Configuration Example for QoS Statistics

        This example shows how to display statistics for policy maps that are configured on interfaces:

        switch(config)# show policy-map interface
        
        Global statistics status :   enabled
        
        Vethernet3
        
          Service-policy (qos) input:   new-policy 
            policy statistics status:   enabled
        
            Class-map (qos):   class-default (match-any)
              59610700 packets 
              set prec 5
        
        Vethernet5
        
          Service-policy (qos) output:   new-policer 
            policy statistics status:   enabled
        
            Class-map (qos):   new-class (match-all)
              344661013 packets 
              Match: precedence 5
              police cir 900 mbps bc 200 ms 
                conformed 505953339796 bytes, 899924196 bps action: transmit 
                violated 12285218014 bytes, 22283000 bps action: drop 

        This example shows how to display the status of the global statistics and the configured policy maps on a specific interface:

        switch(config)# show policy-map interface vethernet 3
        
        Global statistics status :   enabled
        
        Vethernet3
        
          Service-policy (qos) input:   policy-protoacl
            policy statistics status:   enabled
        
            Class-map (qos):   class-protoacl (match-any)
              132 packets 
              Match: access-group protoacl
                132 packets 
              set qos-group 100

        Standards

        No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.

        MIBs

        MIBS MIBs Link
        CISCO-PROCESS-MIB

        To locate and download MIBs, go to the following URL: http:/​/​www.cisco.com/​public/​sw-center/​netmgmt/​cmtk/​mibs.shtml

        RFCs

        No RFCs are supported by this feature.

        Technical Assistance

        Description

        Link

        Technical Assistance Center (TAC) home page, contains 30,000 pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.

        http:/​/​www.cisco.com/​cisco/​web/​support/​index.html

        Feature History for QoS Statistics

        This section provides the QoS statistics release history.

        Feature Name

        Release

        Feature Information

        QoS Statistics

        4.0

        This feature was introduced