Contents

Flexible NetFlow Export over IPv4

The Flexible NetFlow Export over IPv4 feature allows IPv4 and IPv6 flow records to be exported to the collector over IPv4.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Information About Flexible NetFlow Export over IPv4

Flexible NetFlow Export over IPv4 Overview

Flow exporters are created as separate components in a router’s configuration. Exporters are assigned to flow monitors to export the data from the flow monitor cache to a remote system such as a NetFlow collector. Flow monitors can support more than one exporter. Each exporter can be customized to meet the requirements of the flow monitor or monitors in which it is used and the NetFlow collector systems to which it is exporting data.

The Flexible Netflow Export over IPv4 feature allows IPv4 and IPv6 flow records to be exported to the collector over IPv4.

How to Configure Flexible NetFlow Export over IPv4

Configuring a Flow Exporter for the Flow Monitor

Perform this optional task to configure a flow exporter for the flow monitor in order to export the data that is collected by Flexible NetFlow to a remote system for further analysis and storage.

Flow exporters are used to send the data that you collect with Flexible NetFlow to a remote system such as a NetFlow Collection Engine. Exporters use UDP as the transport protocol and use the Version 9 export format.


Note

Each flow exporter supports only one destination. If you want to export the data to multiple destinations, you must configure multiple flow exporters and assign them to the flow monitor.

You can export to a destination using either an IPv4 or IPv6 address.

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    flow exporter exporter-name

    4.    description description

    5.    destination {hostname | ip-address} [vrf vrf-name]

    6.    export-protocol {netflow-v5 | netflow-v9 | ipfix}

    7.    transport udp udp-port

    8.    exit

    9.    flow monitor flow-monitor-name

    10.    exporter exporter-name

    11.    end

    12.    show flow exporter exporter-name

    13.    show running-config flow exporter exporter-name


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable


    Example:
    Device> enable
     

    Enables privileged EXEC mode.

    • Enter your password if prompted.
     
    Step 2 configure terminal


    Example:
    Device# configure terminal
     

    Enters global configuration mode.

     
    Step 3 flow exporter exporter-name


    Example:
    Device(config)# flow exporter EXPORTER-1
     

    Creates a flow exporter and enters Flexible NetFlow flow exporter configuration mode.

    • This command also allows you to modify an existing flow exporter.
     
    Step 4 description description


    Example:
    Device(config-flow-exporter)# description Exports to datacenter
     

    (Optional) Creates a description for the flow exporter.

     
    Step 5 destination {hostname | ip-address} [vrf vrf-name]


    Example:
    Device(config-flow-exporter)# destination 172.16.10.2
     

    Specifies the hostname or IP address of the system to which the exporter sends data.

    Note   

    You can export to a destination using either an IPv4 or IPv6 address.

     
    Step 6 export-protocol {netflow-v5 | netflow-v9 | ipfix}


    Example:
    Device(config-flow-exporter)# export-protocol netflow-v9
     

    Specifies the version of the NetFlow export protocol used by the exporter.

    • Default: netflow-v9.
     
    Step 7 transport udp udp-port


    Example:
    Device(config-flow-exporter)# transport udp 65
     

    Configures UDP as the transport protocol and specifies the UDP port on which the destination system is listening for exported Flexible NetFlow traffic.

     
    Step 8 exit


    Example:
    Device(config-flow-exporter)# exit
     

    Exits Flexible NetFlow flow exporter configuration mode and returns to global configuration mode.

     
    Step 9 flow monitor flow-monitor-name


    Example:
    Device(config)# flow monitor FLOW-MONITOR-1
     

    Enters Flexible NetFlow flow monitor configuration mode for the flow monitor that you created previously.

     
    Step 10 exporter exporter-name


    Example:
    Device(config-flow-monitor)# exporter EXPORTER-1
     

    Specifies the name of an exporter that you created previously.

     
    Step 11 end


    Example:
    Device(config-flow-monitor)# end
     

    Exits Flexible NetFlow flow monitor configuration mode and returns to privileged EXEC mode.

     
    Step 12 show flow exporter exporter-name


    Example:
    Device# show flow exporter FLOW_EXPORTER-1
     

    (Optional) Displays the current status of the specified flow exporter.

     
    Step 13 show running-config flow exporter exporter-name


    Example:
    Device<# show running-config flow exporter FLOW_EXPORTER-1
     

    (Optional) Displays the configuration of the specified flow exporter.

     

    Configuration Examples for Flexible NetFlow Export over IPv4

    Example: Configuring Multiple Export Destinations

    The following example shows how to configure multiple export destinations for Flexible NetFlow for IPv4 or IPv6 traffic.

    This sample starts in global configuration mode: 

    !
flow exporter EXPORTER-1
 destination 172.16.10.2
 transport udp 90
 exit
!
flow exporter EXPORTER-2
 destination 172.16.10.3
 transport udp 90
 exit
!
flow record v4_r1
match ipv4 tos
match ipv4 protocol
match ipv4 source address
match ipv4 destination address
match transport source-port
match transport destination-port
collect counter bytes long
collect counter packets long
!
flow record v6_r1
match ipv6 traffic-class
match ipv6 protocol
match ipv6 source address
match ipv6 destination address
match transport source-port
match transport destination-port
collect counter bytes long
collect counter packets long
!

flow monitor FLOW-MONITOR-1
 record v4_r1
 exporter EXPORTER-2
 exporter EXPORTER-1
!
!
flow monitor FLOW-MONITOR-2
 record v6_r1
 exporter EXPORTER-2
 exporter EXPORTER-1
!
ip cef
!
interface GigabitEthernet1/0/0
 ip address 172.16.6.2 255.255.255.0
 ipv6 address 2001:DB8:2:ABCD::2/48
 ip flow monitor FLOW-MONITOR-1 input
 ipv6 flow monitor FLOW-MONITOR-2 input
!

    The following display output shows that the flow monitor is exporting data to the two exporters: 

    Device# show flow monitor FLOW-MONITOR-1
Flow Monitor FLOW-MONITOR-1:
  Description:       User defined
  Flow Record:       v4_r1
  Flow Exporter:     EXPORTER-1
                     EXPORTER-2
  Cache:
    Type:              normal (Platform cache)
    Status:            allocated
    Size:              4096 entries / 311316 bytes
    Inactive Timeout:  15 secs
    Active Timeout:    1800 secs
    Update Timeout:    1800 secs

    Additional References

    Related Documents

    Related Topic

    Document Title

    Cisco IOS commands

    Cisco IOS Master Command List, All Releases

    Flexible NetFlow conceptual information and configuration tasks

    Flexible NetFlow Configuration Guide

    Flexible NetFlow commands

    Cisco IOS Flexible NetFlow Command Reference

    Standards/RFCs

    Standard

    Title

    No new or modified standards/RFCs are supported by this feature.

    —

    MIBs

    MIB

    MIBs Link

    None

    To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL:

    http:/​/​www.cisco.com/​go/​mibs

    Technical Assistance

    Description

    Link

    The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.

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

    Feature Information for Flexible NetFlow Export over IPv4

    The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

    Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

    Table 1 Feature Information for Flexible NetFlow Export over IPv4

    Feature Name

    Releases

    Feature Information

    Flexible NetFlow Export over IPv4

    15.0(S)

    Cisco IOS XE Release 3.1S

    Cisco IOS XE Release 3.2SE

    The Flexible Netflow Export over IPv4 feature allows IPv4 and IPv6 flow records to be exported to the collector over IPv4.

    No commands were introduced or modified by this feature.

    Flexible NetFlow Export over IPv4

    Flexible NetFlow Export over IPv4

    The Flexible NetFlow Export over IPv4 feature allows IPv4 and IPv6 flow records to be exported to the collector over IPv4.

    Finding Feature Information

    Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

    Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

    Information About Flexible NetFlow Export over IPv4

    Flexible NetFlow Export over IPv4 Overview

    Flow exporters are created as separate components in a router’s configuration. Exporters are assigned to flow monitors to export the data from the flow monitor cache to a remote system such as a NetFlow collector. Flow monitors can support more than one exporter. Each exporter can be customized to meet the requirements of the flow monitor or monitors in which it is used and the NetFlow collector systems to which it is exporting data.

    The Flexible Netflow Export over IPv4 feature allows IPv4 and IPv6 flow records to be exported to the collector over IPv4.

    How to Configure Flexible NetFlow Export over IPv4

    Configuring a Flow Exporter for the Flow Monitor

    Perform this optional task to configure a flow exporter for the flow monitor in order to export the data that is collected by Flexible NetFlow to a remote system for further analysis and storage.

    Flow exporters are used to send the data that you collect with Flexible NetFlow to a remote system such as a NetFlow Collection Engine. Exporters use UDP as the transport protocol and use the Version 9 export format.


    Note

    Each flow exporter supports only one destination. If you want to export the data to multiple destinations, you must configure multiple flow exporters and assign them to the flow monitor.

    You can export to a destination using either an IPv4 or IPv6 address.

    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    flow exporter exporter-name

      4.    description description

      5.    destination {hostname | ip-address} [vrf vrf-name]

      6.    export-protocol {netflow-v5 | netflow-v9 | ipfix}

      7.    transport udp udp-port

      8.    exit

      9.    flow monitor flow-monitor-name

      10.    exporter exporter-name

      11.    end

      12.    show flow exporter exporter-name

      13.    show running-config flow exporter exporter-name


    DETAILED STEPS
       Command or ActionPurpose
      Step 1 enable


      Example:
      Device> enable
       

      Enables privileged EXEC mode.

      • Enter your password if prompted.
       
      Step 2 configure terminal


      Example:
      Device# configure terminal
       

      Enters global configuration mode.

       
      Step 3 flow exporter exporter-name


      Example:
      Device(config)# flow exporter EXPORTER-1
       

      Creates a flow exporter and enters Flexible NetFlow flow exporter configuration mode.

      • This command also allows you to modify an existing flow exporter.
       
      Step 4 description description


      Example:
      Device(config-flow-exporter)# description Exports to datacenter
       

      (Optional) Creates a description for the flow exporter.

       
      Step 5 destination {hostname | ip-address} [vrf vrf-name]


      Example:
      Device(config-flow-exporter)# destination 172.16.10.2
       

      Specifies the hostname or IP address of the system to which the exporter sends data.

      Note   

      You can export to a destination using either an IPv4 or IPv6 address.

       
      Step 6 export-protocol {netflow-v5 | netflow-v9 | ipfix}


      Example:
      Device(config-flow-exporter)# export-protocol netflow-v9
       

      Specifies the version of the NetFlow export protocol used by the exporter.

      • Default: netflow-v9.
       
      Step 7 transport udp udp-port


      Example:
      Device(config-flow-exporter)# transport udp 65
       

      Configures UDP as the transport protocol and specifies the UDP port on which the destination system is listening for exported Flexible NetFlow traffic.

       
      Step 8 exit


      Example:
      Device(config-flow-exporter)# exit
       

      Exits Flexible NetFlow flow exporter configuration mode and returns to global configuration mode.

       
      Step 9 flow monitor flow-monitor-name


      Example:
      Device(config)# flow monitor FLOW-MONITOR-1
       

      Enters Flexible NetFlow flow monitor configuration mode for the flow monitor that you created previously.

       
      Step 10 exporter exporter-name


      Example:
      Device(config-flow-monitor)# exporter EXPORTER-1
       

      Specifies the name of an exporter that you created previously.

       
      Step 11 end


      Example:
      Device(config-flow-monitor)# end
       

      Exits Flexible NetFlow flow monitor configuration mode and returns to privileged EXEC mode.

       
      Step 12 show flow exporter exporter-name


      Example:
      Device# show flow exporter FLOW_EXPORTER-1
       

      (Optional) Displays the current status of the specified flow exporter.

       
      Step 13 show running-config flow exporter exporter-name


      Example:
      Device<# show running-config flow exporter FLOW_EXPORTER-1
       

      (Optional) Displays the configuration of the specified flow exporter.

       

      Configuration Examples for Flexible NetFlow Export over IPv4

      Example: Configuring Multiple Export Destinations

      The following example shows how to configure multiple export destinations for Flexible NetFlow for IPv4 or IPv6 traffic.

      This sample starts in global configuration mode: 

      !
flow exporter EXPORTER-1
 destination 172.16.10.2
 transport udp 90
 exit
!
flow exporter EXPORTER-2
 destination 172.16.10.3
 transport udp 90
 exit
!
flow record v4_r1
match ipv4 tos
match ipv4 protocol
match ipv4 source address
match ipv4 destination address
match transport source-port
match transport destination-port
collect counter bytes long
collect counter packets long
!
flow record v6_r1
match ipv6 traffic-class
match ipv6 protocol
match ipv6 source address
match ipv6 destination address
match transport source-port
match transport destination-port
collect counter bytes long
collect counter packets long
!

flow monitor FLOW-MONITOR-1
 record v4_r1
 exporter EXPORTER-2
 exporter EXPORTER-1
!
!
flow monitor FLOW-MONITOR-2
 record v6_r1
 exporter EXPORTER-2
 exporter EXPORTER-1
!
ip cef
!
interface GigabitEthernet1/0/0
 ip address 172.16.6.2 255.255.255.0
 ipv6 address 2001:DB8:2:ABCD::2/48
 ip flow monitor FLOW-MONITOR-1 input
 ipv6 flow monitor FLOW-MONITOR-2 input
!

      The following display output shows that the flow monitor is exporting data to the two exporters: 

      Device# show flow monitor FLOW-MONITOR-1
Flow Monitor FLOW-MONITOR-1:
  Description:       User defined
  Flow Record:       v4_r1
  Flow Exporter:     EXPORTER-1
                     EXPORTER-2
  Cache:
    Type:              normal (Platform cache)
    Status:            allocated
    Size:              4096 entries / 311316 bytes
    Inactive Timeout:  15 secs
    Active Timeout:    1800 secs
    Update Timeout:    1800 secs

      Additional References

      Related Documents

      Related Topic

      Document Title

      Cisco IOS commands

      Cisco IOS Master Command List, All Releases

      Flexible NetFlow conceptual information and configuration tasks

      Flexible NetFlow Configuration Guide

      Flexible NetFlow commands

      Cisco IOS Flexible NetFlow Command Reference

      Standards/RFCs

      Standard

      Title

      No new or modified standards/RFCs are supported by this feature.

      —

      MIBs

      MIB

      MIBs Link

      None

      To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL:

      http:/​/​www.cisco.com/​go/​mibs

      Technical Assistance

      Description

      Link

      The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.

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

      Feature Information for Flexible NetFlow Export over IPv4

      The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

      Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

      Table 1 Feature Information for Flexible NetFlow Export over IPv4

      Feature Name

      Releases

      Feature Information

      Flexible NetFlow Export over IPv4

      15.0(S)

      Cisco IOS XE Release 3.1S

      Cisco IOS XE Release 3.2SE

      The Flexible Netflow Export over IPv4 feature allows IPv4 and IPv6 flow records to be exported to the collector over IPv4.

      No commands were introduced or modified by this feature.