IP SLAs Configuration Guide, Cisco IOS Release 15S
Configuring IP SLAs FTP Operations
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Configuring IP SLAs FTP Operations

Configuring IP SLAs FTP Operations

This module describes how to configure an IP Service Level Agreements (SLAs) File Transfer Protocol (FTP) operation to measure the response time between a Cisco device and an FTP server to retrieve a file. The IP SLAs FTP operation supports an FTP GET request only. This module also demonstrates how the results of the FTP operation can be displayed and analyzed to determine the capacity of your network. The FTP operation can be used also for troubleshooting FTP server performance.

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.

Restrictions for IP SLAs FTP Operations

The IP SLAs FTP operation only supports FTP GET (download) requests.

Information About IP SLAs FTP Operations

FTP Operation

The FTP operation measures the round-trip time (RTT) between a Cisco device and an FTP server to retrieve a file. FTP is an application protocol, part of the Transmission Control Protocol (TCP)/IP protocol stack, used for transferring files between network nodes.

In the figure below Device B is configured as the source IP SLAs device and an FTP operation is configured with the FTP server as the destination device.

Figure 1. FTP Operation

Connection response time is computed by measuring the time taken to download a file to Device B from the remote FTP server using FTP over TCP. This operation does not use the IP SLAs Responder.


Note


To test the response time to connect to an FTP port (Port 21), use the IP SLAs TCP Connect operation.


Both active and passive FTP transfer modes are supported. The passive mode is enabled by default. Only the FTP GET (download) operation type is supported. The URL specified for the FTP GET operation must be in one of the following formats:

  • ftp://username:password@host/filename

  • ftp://host/filename

If the username and password are not specified, the defaults are anonymous and test, respectively.

FTP carries a significant amount of data traffic and can affect the performance of your network. The results of an IP SLAs FTP operation to retrieve a large file can be used to determine the capacity of the network but retrieve large files with caution because the FTP operation will consume more bandwidth. The FTP operation also measures your FTP server performance levels by determining the RTT taken to retrieve a file.

How to Configure IP SLAs FTP Operations

Configuring an FTP Operation on a Source Device


Note


There is no need to configure an IP SLAs responder on the destination device.


Perform one of the following tasks:

Configuring a Basic FTP Operation on the Source Device

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    ip sla operation-number

    4.    ftp get url [source-ip {ip-address | hostname}] [mode {passive | active}

    5.    frequency seconds

    6.    end


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 ip sla operation-number


    Example:
    Device(config)# ip sla 10
     

    Begins configuration for an IP SLAs operation and enters IP SLA configuration mode.

     
    Step 4 ftp get url [source-ip {ip-address | hostname}] [mode {passive | active}


    Example:
    Device(config-ip-sla)# ftp get ftp://username:password@hostip/test.cap
     

    Defines an FTP operation and enters IP SLA FTP configuration mode.

     
    Step 5 frequency seconds


    Example:
    Device(config-ip-sla-ftp)# frequency 30
     

    (Optional) Sets the rate at which a specified IP SLAs operation repeats.

     
    Step 6 end


    Example:
    Device(config-ip-sla-ftp)# exit 
     

    Exits to privileged EXEC mode.

     

    Configuring an FTP Operation with Optional Parameters on the Source Device

    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    ip sla operation-number

      4.    ftp get url [source-ip {ip-address | hostname}] [mode {passive | active}

      5.    history buckets-kept size

      6.    history distributions-of-statistics-kept size

      7.    history enhanced [interval seconds] [buckets number-of-buckets]

      8.    history filter {none | all | overThreshold | failures}

      9.    frequency seconds

      10.    history hours-of-statistics-kept hours

      11.    history lives-kept lives

      12.    owner owner-id

      13.    history statistics-distribution-interval milliseconds

      14.    tag text

      15.    threshold milliseconds

      16.    timeout milliseconds

      17.    end


    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 ip sla operation-number


      Example:
      Device(config)# ip sla 10
       

      Begins configuration for an IP SLAs operation and enters IP SLA configuration mode.

       
      Step 4 ftp get url [source-ip {ip-address | hostname}] [mode {passive | active}


      Example:
      Device(config-ip-sla)# ftp get ftp://username:password@hostip/filename
       

      Defines an FTP operation and enters IP SLA FTP configuration mode.

       
      Step 5 history buckets-kept size


      Example:
      Device(config-ip-sla-ftp)# history buckets-kept 25
       

      (Optional) Sets the number of history buckets that are kept during the lifetime of an IP SLAs operation.

       
      Step 6 history distributions-of-statistics-kept size


      Example:
      Device(config-ip-sla-ftp)# history distributions-of-statistics-kept 5
       

      (Optional) Sets the number of statistics distributions kept per hop during an IP SLAs operation.

       
      Step 7 history enhanced [interval seconds] [buckets number-of-buckets]


      Example:
      Device(config-ip-sla-ftp)# history enhanced interval 900 buckets 100
       

      (Optional) Enables enhanced history gathering for an IP SLAs operation.

       
      Step 8 history filter {none | all | overThreshold | failures}


      Example:
      Device(config-ip-sla-ftp)# history filter failures
       

      (Optional) Defines the type of information kept in the history table for an IP SLAs operation.

       
      Step 9 frequency seconds


      Example:
      Device(config-ip-sla-ftp)# frequency 30
       

      (Optional) Sets the rate at which a specified IP SLAs operation repeats.

       
      Step 10 history hours-of-statistics-kept hours


      Example:
      Device(config-ip-sla-ftp)# history hours-of-statistics-kept 4
       

      (Optional) Sets the number of hours for which statistics are maintained for an IP SLAs operation.

       
      Step 11 history lives-kept lives


      Example:
      Device(config-ip-sla-ftp)# history lives-kept 5
       

      (Optional) Sets the number of lives maintained in the history table for an IP SLAs operation.

       
      Step 12 owner owner-id


      Example:
      Device(config-ip-sla-ftp)# owner admin 
       

      (Optional) Configures the Simple Network Management Protocol (SNMP) owner of an IP SLAs operation.

       
      Step 13 history statistics-distribution-interval milliseconds


      Example:
      Device(config-ip-sla-ftp)# history statistics-distribution-interval 10
       

      (Optional) Sets the time interval for each statistics distribution kept for an IP SLAs operation.

       
      Step 14 tag text


      Example:
      Device(config-ip-sla-ftp)# tag TelnetPollServer1 
       

      (Optional) Creates a user-specified identifier for an IP SLAs operation.

       
      Step 15 threshold milliseconds


      Example:
      Device(config-ip-sla-ftp)# threshold 10000
       

      (Optional) Sets the upper threshold value for calculating network monitoring statistics created by an IP SLAs operation.

       
      Step 16 timeout milliseconds


      Example:
      Device(config-ip-sla-ftp)# timeout 10000 
       

      (Optional) Sets the amount of time an IP SLAs operation waits for a response from its request packet.

       
      Step 17 end


      Example:
      Device(config-ip-sla-ftp)# end
       

      Exits to privileged EXEC mode.

       

      Scheduling IP SLAs Operations

      Before You Begin
      • All IP Service Level Agreements (SLAs) operations to be scheduled must be already configured.
      • The frequency of all operations scheduled in a multioperation group must be the same.
      • The list of one or more operation ID numbers to be added to a multioperation group must be limited to a maximum of 125 characters in length, including commas (,).
      SUMMARY STEPS

        1.    enable

        2.    configure terminal

        3.    Enter one of the following commands:

        • ip sla schedule operation-number [life {forever | seconds}] [start-time {[hh:mm:ss] [month day | day month] | pending | now | after hh:mm:ss}] [ageout seconds] [recurring]
        • ip sla group schedule group-operation-number operation-id-numbers {schedule-period schedule-period-range | schedule-together} [ageout seconds] [frequency group-operation-frequency] [life {forever | seconds}] [start-time {hh:mm [:ss] [month day | day month] | pending | now | after hh:mm [:ss]}]

        4.    end

        5.    show ip sla group schedule

        6.    show ip sla configuration


      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 Enter one of the following commands:
        • ip sla schedule operation-number [life {forever | seconds}] [start-time {[hh:mm:ss] [month day | day month] | pending | now | after hh:mm:ss}] [ageout seconds] [recurring]
        • ip sla group schedule group-operation-number operation-id-numbers {schedule-period schedule-period-range | schedule-together} [ageout seconds] [frequency group-operation-frequency] [life {forever | seconds}] [start-time {hh:mm [:ss] [month day | day month] | pending | now | after hh:mm [:ss]}]


        Example:
        Device(config)# ip sla schedule 10 life forever start-time now
        Device(config)# ip sla schedule 10 schedule-period frequency
        Device(config)# ip sla group schedule 1 3,4,6-9 life forever start-time now 
        Device(config)# ip sla schedule 1 3,4,6-9 schedule-period 50 frequency range 80-100
         
        • Configures the scheduling parameters for an individual IP SLAs operation.

        • Specifies an IP SLAs operation group number and the range of operation numbers for a multioperation scheduler.

         
        Step 4 end


        Example:
        Device(config)# end
         

        Exits global configuration mode and returns to privileged EXEC mode.

         
        Step 5 show ip sla group schedule


        Example:
        Device# show ip sla group schedule
         

        (Optional) Displays IP SLAs group schedule details.

         
        Step 6 show ip sla configuration


        Example:
        Device# show ip sla configuration
         

        (Optional) Displays IP SLAs configuration details.

         

        Troubleshooting Tips

        • If the IP Service Level Agreements (SLAs) operation is not running and not generating statistics, add the verify-data command to the configuration (while configuring in IP SLA configuration mode) to enable data verification. When data verification is enabled, each operation response is checked for corruption. Use the verify-data command with caution during normal operations because it generates unnecessary overhead.

        • Use the debug ip sla trace and debug ip sla error commands to help troubleshoot issues with an IP SLAs operation.

        What to Do Next

        To add proactive threshold conditions and reactive triggering for generating traps (or for starting another operation) to an IP Service Level Agreements (SLAs) operation, see the “Configuring Proactive Threshold Monitoring” section.

        Configuration Examples for IP SLAs FTP Operations

        Example: Configuring an FTP Operation

        The following example shows how to configure an FTP operation from Device B to the FTP server as shown in the "FTP Operation" figure in the "Information About IP SLAs FTP Operation" section. The operation is scheduled to start every day at 1:30 a.m. In this example, the file named test.cap is to be retrieved from the host, cisco.com, with a password of abc using FTP in active mode.

        Device B Configuration

        ip sla 10
         ftp get ftp://user1:abc@test.cisco.com/test.cap mode active
         frequency 20
         tos 128
         timeout 40000
         tag FLL-FTP
        ip sla schedule 10 start-time 01:30:00 recurring

        Additional References

        Related Documents

        Related Topic

        Document Title

        Cisco IOS commands

        Cisco IOS Master Commands List, All Releases

        IP SLAs commands

        IP SLAs Command Reference

        Standards

        Standards

        Title

        ITU-T G.711 u-law and G.711 a-law

        Pulse code modulation (PCM) of voice frequencies

        ITU-T G.729A

        Reduced complexity 8 kbit/s CS-ACELP speech codec

        MIBs

        MIBs

        MIBs Link

        CISCO-RTTMON-MIB

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

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

        RFCs

        RFCs

        Title

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

        --

        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 Configuring IP SLAs FTP Operations

        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 the IP SLAs FTP Operation

        Feature Name

        Releases

        Feature Information

        IP SLAs - FTP Operation

        12.2(31)SB2

        12.2(33)SRB1

        12.2(33)SXH

        12.3(14)T

        Cisco IOS XE Release 2.1

        15.0(1)S

        Cisco IOS XE Release 3.1.0SG

        The IP SLAs File Transfer Protocol (FTP) operation allows you to measure the network response time between a Cisco device and an FTP server to retrieve a file.

        IPSLA 4.0 - IP v6 phase2

        15.2(3)T

        15.2(4)S

        Cisco IOS XE release XE 3.7S

        15.1(2)SG

        Cisco IOS XE Release 3.4SG

        Support was added for operability in IPv6 networks.

        The following commands are introduced or modified: ftp get (IP SLA), show ip sla configuration, show ip sla summary.

        IP SLAs VRF Aware 2.0

        12.4(2)T

        15.1(1)S

        15.1(1)SY

        Cisco IOS XE Release 3.8S

        Support was added for IP SLAs VRF-aware capabilities for TCP connect, FTP, HTTP and DNS client operation types.