Configuring Storm Control

A traffic storm occurs when packets flood the LAN, creating excessive traffic and degrading network performance. The traffic broadcast and multicast suppression (or storm control) feature prevents LAN ports from being disrupted by a broadcast, multicast and unicast traffic storm on physical interfaces.

Restrictions for Configuring Strorm Control

  • Storm control cannot be configured per port. It is configured globally on all ports

Information on Storm Control

A broadcast storm occurs when huge amount of broadcast, multicast, or unknown unicast packets flood the LAN, creating excessive traffic and degrading network performance. Errors in the protocol-stack implementation or in the network configuration can also cause a storm. The mechanism to prevent and control such events is known as storm control or broadcast suppression.

Broadcast and Multicast Suppression monitors incoming traffic levels periodically, and compares traffic level with configured storm control policer level or rate. The traffic storm control threshold level is measured based on the traffic rate in bits (or kilobits) per second at which broadcast, multicast, unicast packets are received.

Storm control prevents traffic on a LAN from being disrupted by a broadcast, multicast, or unicast storm on a port. Storm control is applicable for physical interfaces and is used to restrict the unicast, broadcast and multicast ingress traffic on the Layer2 interfaces.

How to Configure Storm Control

Provisioning the Cisco ME 1200 NID to Configure Storm Control

     Command or ActionPurpose
    Step 1ProvisionStormControl


    Example: 
    Switch# ProvisionStormControl
          		Enters Storm control provisioning mode.  
    Step 2ProvisionStormControl {getStormControlGlobal | setStormControlGlobal | showStormControl |no | exit}


    Example: 
    Switch(ProvisionStormControl)# ?
     

    Displays the supported configurations for storm control.

     
    Step 3exit


    Example: 
    Switch(ProvisionStormControl)# exit
     

    Exits the storm control mode.

     

    Configuration Example

    The following example shows the supported storm control configuration: 

    Switch(ProvisionStormControl)# ?
ProvisionStormControl sub-mode commands:
  exit                   Exit from ProvisionStormControl sub configuration mode
  getStormControlGlobal  Storm Control Global Configuration Get Request
  no                     Negate a command or set its defaults
  setStormControlGlobal  Storm Control Global Configuration Set Request
  showStormControl       Display Storm Control Policer properties

    Configuring Storm Control on the Cisco ME 1200 NID

    Before You Begin

    • Perform the steps to provision storm control on the Cisco ME 1200 NID.

       Command or ActionPurpose
      Step 1setStormControlGlobal {commit | flush | stormControlGlobalConfiguration | review}


      Example: 
      Switch(ProvisionStormControl)# setStormControlGlobal ?
  commit                           commit setStormControlGlobal
  flush                            flush all setStormControlGlobal commands
                                   from queue
  review                           review setStormControlGlobal commands
  stormControlGlobalConfiguration  Storm Control Global Configuration Set
                                   Request
       

      Configures global storm control.

      • commit—Sends the storm control configuration to NID.

      • flush—Flushes all storm control configuration from the queue.

      • stormControlGlobalConfiguration—Sets the storm control configuration globally.

        Note    Storm control is configured globally (all ports) and not per port.

      • review—Displays the configuration.

       
      Step 2 setStormControlGlobal stormControlGlobalConfiguration {broadcast {bc-enabled {enable | disable} | level level-bps | mode {bps | kbps}} | multicast {level level-bps | mc-enabled {enable | disable} | mode {bps | kbps}} | unicast {level level-bps | uc-enabled {enable | disable} | mode {bps | kbps}}}


      Example: 
      Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration broadcast level 64
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration broadcast mode kps
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration broadcast bc-enabled enable
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration mulicast level 8
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration mulicast mode bps
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration broadcast mc-enabled disable
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration unicast level 16 
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration unicast uc-enabled disable
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration unicast mode bps
       

      • broadcast—Sets police broadcast frames.

      • multicast—Sets police multicast frames.

      • unicast—Sets police unicast frames.

      • bc-enabled—Sets broadcast policer rate.

      • mc-enabled—Sets multicast policer rate.

      • uc-enabled—Sets unicast policer rate.

      • level level-bps—Configure policer rate or level. Allowed values are 1,2,4,8,16,32,64,128,256,512 (bps/kbps) and 1024 kbps.

      • mode—Sets the mode in bps or kbps

      • bps—Configures policer rate in bps.

      • kbps—Configures policer rate in kbps.

      • disable—Disables the storm control configuration.

      • enable—Enables the storm control configuration.

       
      Step 3setStormControlGlobal review


      Example: 
      Switch(ProvisionStormControl)# setStormControlGlobal review

Commands in queue:
        setStormControlGlobal stormControlGlobalConfiguration broadcast bc-enabled enable
        setStormControlGlobal stormControlGlobalConfiguration broadcast level 64
        setStormControlGlobal stormControlGlobalConfiguration broadcast mode bps
        setStormControlGlobal stormControlGlobalConfiguration unicast uc-enabled enable
        setStormControlGlobal stormControlGlobalConfiguration unicast level 16
        setStormControlGlobal stormControlGlobalConfiguration unicast mode kbps
        setStormControlGlobal stormControlGlobalConfiguration multicast mc-enabled enable
        setStormControlGlobal stormControlGlobalConfiguration multicast mode bps
        setStormControlGlobal stormControlGlobalConfiguration unicast level 8
       

      Displays the storm control configuration.

       
      Step 4setStormControlGlobalcommit


      Example: 
      Switch(ProvisionStormControl)# setStormControlGlobal commit
       

      Sends the storm control configuration to the NID.

       
      Step 5exit


      Example: 
      Switch(ProvisionStormControl)# exit
       

      Exits the storm control mode.

       

      Configuration Example

      The example shows how to configure storm control on the Cisco ME 1200 NID : 

      Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration broadcast level 64
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration broadcast mode kps
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration broadcast bc-enabled enable
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration mulicast level 8
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration mulicast mode bps
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration broadcast mc-enabled disable
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration unicast level 16 
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration unicast uc-enabled disable
Switch(ProvisionStormControl)# setStormControlGlobal stormControlGlobalConfiguration unicast mode bps
Switch(ProvisionStormControl)# setStormControlGlobal review

Commands in queue:
        setStormControlGlobal stormControlGlobalConfiguration broadcast bc-enabled enable
        setStormControlGlobal stormControlGlobalConfiguration broadcast level 64
        setStormControlGlobal stormControlGlobalConfiguration broadcast mode bps
        setStormControlGlobal stormControlGlobalConfiguration unicast uc-enabled enable
        setStormControlGlobal stormControlGlobalConfiguration unicast level 16
        setStormControlGlobal stormControlGlobalConfiguration unicast mode kbps
        setStormControlGlobal stormControlGlobalConfiguration multicast mc-enabled enable
        setStormControlGlobal stormControlGlobalConfiguration multicast mode bps
        setStormControlGlobal stormControlGlobalConfiguration unicast level 8

Switch(ProvisionStormControl)# setStormControlGlobal commit
SetStormControlGlobal Commit Success!!!
Switch(ProvisionStormControl)#end

      Retrieving the Storm Control Configuration

      Before You Begin

      • Perform the steps to provision storm control on the Cisco ME 1200 NID.

         Command or ActionPurpose
        Step 1 getStormControlGlobal {commit | flush | getStormControlGlobalRequest | review}


        Example: 
        Switch(ProvisionStormControl)#getStormControlGlobal getStormControlGlobalRequest
Switch(ProvisionStormControl)#getStormControlGlobal review
Switch(ProvisionStormControl)#getStormControlGlobal commit
         

        Retrieve the storm control configuration.

        • getStormControlGlobalRequest—Request storm control configuration properties.

        • commit—Sends the storm control configuration to NID.

        • flush—Flushes all storm control configuration from the queue.

        • review—Displays the configuration.

         
        Step 2exit


        Example: 
        Switch(ProvisionStormControl)# exit
         

        Exits the storm control mode.

         

        Configuration Example

        The example shows how to retrieve the configuration on the ME1200: 

        Switch(ProvisionStormControl)#getStormControlGlobal getStormControlGlobalRequest
Switch(ProvisionStormControl)#getStormControlGlobal review
Commands in queue:
        getStormControlGlobal getStormControlGlobalRequest
        getStormControlGlobal getStormControlGlobalRequest

Switch(ProvisionStormControl)# getStormControlGlobal commmit
Switch(ProvisionStormControl)# end

        Displaying the Storm Control Configuration

        Before You Begin

        • Perform the steps to provision storm control on the Cisco ME 1200 NID.

           Command or ActionPurpose
          Step 1 showStormControl {commit | flush | showStormControlReq | review}


          Example: 
          Switch(ProvisionStormControl)#showStormControl showStormControlReq
Switch(ProvisionStormControl)#showStormControl review
Switch(ProvisionStormControl)#showStormControl commit
           

          Displays the storm control configuration.

          • showStormControlReq—Displays storm control policer properties.

          • commit—Sends the show storm control configuration to NID.

          • flush—Flushes all show storm control configuration from the queue.

          • review—Displays the show storm configuration.

           
          Step 2exit


          Example: 
          Switch(ProvisionStormControl)# exit
           

          Exits the storm control mode.

           

          Configuration Example

          The example shows how to view the configuration: 

          Switch(ProvisionStormControl)#showStormControl showStormControlReq
Switch(ProvisionStormControl)#showStormControl review

Commands in queue:
        showStormControl showStormControlReq
Switch(ProvisionStormControl)#showStormControl commit

ShowStormControl_Output.stormControlGlobalConfiguration.broadcast.bc_enabled = true
ShowStormControl_Output.stormControlGlobalConfiguration.broadcast.level = 1024000
ShowStormControl_Output.stormControlGlobalConfiguration.broadcast.mode.t = 2
ShowStormControl_Output.stormControlGlobalConfiguration.broadcast.mode.u.kbps = 'kbps'
ShowStormControl_Output.stormControlGlobalConfiguration.multicast.mc_enabled = true
ShowStormControl_Output.stormControlGlobalConfiguration.multicast.level = 512000
ShowStormControl_Output.stormControlGlobalConfiguration.multicast.mode.t = 2
ShowStormControl_Output.stormControlGlobalConfiguration.multicast.mode.u.kbps = 'kbps'
ShowStormControl_Output.stormControlGlobalConfiguration.unicast.uc_enabled = true
ShowStormControl_Output.stormControlGlobalConfiguration.unicast.level = 1000
ShowStormControl_Output.stormControlGlobalConfiguration.unicast.mode.t = 2
ShowStormControl_Output.stormControlGlobalConfiguration.unicast.mode.u.kbps = 'kbps'
ShowStormControl Commit Success!!!

Switch(ProvisionStormControl)# exit

          Negating Storm Control Configuration and Restoring Defaults


          Note
          Following are the default values for storm control:
          • broadcast

            • bc-enabled

            • level = 1

            • mode = bps

          • multicast

            • mc-enabled

            • level = 1

            • mode = bps

          • unicast

            • uc-enabled

            • level = 1

            • mode = bps

          Before You Begin

          • Perform the steps to provision storm control on the Cisco ME 1200 NID.

             Command or ActionPurpose
            Step 1 no {getStormControlGlobal | setStormControlGlobal | showStormControl | exit}


            Example: 
            Switch(ProvisionStormControl)# no ?
  exit                   Exit from ProvisionStormControl sub configuration mode
  getStormControlGlobal  Storm Control Global Configuration Get Request
  setStormControlGlobal  Storm Control Global Configuration Set Request
  showStormControl       Display Storm Control Policer properties
             

            Negates storm control configurations.

            • getStormControlGlobal—View the configuration.

            • setStormControlGlobal—Sets the configuration.

            • showStormControl—Displays the configuration.

            • exit—Exits from ProvisionStormControl mode.

             
            Step 2exit


            Example: 
            Switch(ProvisionStormControl)# exit
             

            Exits the storm control mode.

             

            Configuration Example

            The following example is a sample output for negation: 

            Switch(ProvisionStormControl)#showStormControl review
Commands in queue:
showStormControl showStormControlReq

Switch(ProvisionStormControl)#no showStormControl showStormControlReq
Switch(ProvisionStormControl)#showStormControl review
No commands in queue

Switch(ProvisionStormControl)#setStormControlGlobal review
Commands in queue:
setStormControlGlobal stormControlGlobalConfiguration broadcast bc-enabled enable
setStormControlGlobal stormControlGlobalConfiguration broadcast level 64
setStormControlGlobal stormControlGlobalConfiguration broadcast level 128

Switch(ProvisionStormControl)#no setStormControlGlobal stormControlGlobalConfiguration broadcast level 64
Switch(ProvisionStormControl)#stormControlGlobal review
Commands in queue:
setStormControlGlobal stormControlGlobalConfiguration broadcast bc-enabled enable
setStormControlGlobal stormControlGlobalConfiguration broadcast level 128

            Deleting the NTP Configuration

            Before You Begin

            • Perform the steps to provision NTP on the Cisco ME 1200 NID.

               Command or ActionPurpose
              Step 1 deleteNtpConfig {commit | flush | ntpDeleteConfig | review}


              Example: 
              Switch(NtpPortType)# deleteNtpConfig ?
  commit           commit deleteNtpConfig
  flush            flush all deleteNtpConfig commands from queue
  ntpDeleteConfig  delete NTP config request
  review           review deleteNtpConfig commands
               

              Removes the storm control configuration.

              • commit—Sends the NTP configuration to NID.

              • flush—Flushes all NTP configuration from the queue.

              • ntpDeleteConfig—Deletes the NTP configuration request on the Cisco ME 1200 NID.

              • review—Displays the configuration.

               
              Step 2ntpDeleteConfig { ntpEnable | ntpServerNoserver-num }


              Example: 
              Switch(NtpPortType)# deleteNtpConfig ntpDeleteConfig ntpEnable
Switch(NtpPortType)# deleteNtpConfig ntpDeleteConfig ntpServer 1
               

              • ntpEnable—Disables the NTP configuration.

              • ntpServerNo—Disables the NTP server.

              • server-num—Specifies the NTP server. The valid range is from 1 to 5.

               
              Step 3exit


              Example: 
              Switch(NtpPortType)# exit
               

              Exits the NTP mode.