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Storm Control for MS

Basic Storm Control

Storm control on MS series switches protects LAN connectivity in the event of a packet storm in a network.  All MS series switches include control plane policing of STP and CDP/LLDP floods to ensure Meraki Cloud connectivity.

Enhanced Storm Control

Note: Storm control configuration options for enhanced storm control are available on MS10.0 and higher for supported models.

Supported models: MS210, MS225, MS250, MS350, MS355, MS390, MS400 series switches


Enhanced Storm Control can be enabled on supported switches to suppress Broadcast, Multicast and Unknown Unicast packets based on a percentage of traffic on a given interface. Suppression monitors the bandwidth of each individual switch port every 1 second. On classic MS switches, if the specified type of traffic exceeds the defined limit, only excess packets will be dropped. On MS390 switches, if the specified type of traffic exceeds the defined limit, all packets will be dropped until the monitored traffic falls below the defined limit.

Enabling Enhanced Storm Control Globally

To enable Enhanced Storm Control globally:

1. Navigate to Switch > Configure > Switch Settings

Switch Settings.png


2. In the Storm Control section, select Add a storm control rule

Add Storm Control Rule.png


3. From the Traffic Types drop down, select the type of traffic you wish to suppress (Broadcast, Multicast, and/or Unknown Unicast)

Screen Shot 2019-07-18 at 8.12.15 AM.png


4. In the % of available port bandwidth field, enter a percentage between 1-100% to complete the configuration of the rule

Available Port Bandwidths.png


5. Select Save at the bottom of the settings page to save your configurations

Save Changes.png

Configuring Port Level Enhanced Storm Control

Note: Port level control is only available if Enhanced Storm Control is enabled globally. Once Enhanced Storm Control is enabled globally, it is enabled on each port by default.


To configure Enhanced Storm Control at the port level:

1. Navigate to Switch > Monitor > Switch ports

Nav to switch ports.png


2. Select the switch port to configure

3. In the Storm Control section, select Enable or Disable

Configure Port.png


4. Select Update to save the port configuration

Update port.png

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