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Configuring a Flexible Switch Stack

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This article explains how to connect and configure a flexible switch stack. Up to eight Meraki MS switches can be configured in a stack to allow for high-speed communication between devices.

Only like-models can be stacked. For example, MS350-48 and MS350-24X can be stacked, but MS250-48 cannot be stacked with a MS350-48.

Flexible stacking is available on MS420 and MS425 switches and do not have dedicated stacking ports; any SFP+ interface on these switches can be configured as a stack port. This article describes flexible stacking.

Physical stacking is available on MS225, MS250, MS350, and MS410 switches, which include dedicated stacking ports. For physical stacking, visit our Configuring a Physical Switch Stack article.


The following steps explain how to prepare a group of switches for flexible stacking, how to stack them together, and how to configure the stack in Dashboard:

  1. Add the switches into a Dashboard network. This can be a new Dashboard network for these switches, or an existing network with other switches. Do not configure the stack in Dashboard yet.
  2. Connect an uplink to each switch. Ensure that the uplink ports are different than the intended stacking ports. 
  1. Power on all the switches, then wait several minutes for them to download the latest firmware and updates from Dashboard. The switches may reboot during this process.
    • The power LEDs on the front of each switch will blink during this process.
    • Once the switches are done downloading and installing firmware, their power LEDs will stay solid white or green.
  2. Choose two ports per switch to be the dedicated stacking ports. Switch stacks should be connected in a ring topology (as shown in the following image). Ensure that the stacking ports are different than the switch uplink port.

Only 10Gb/s (SFP+) and 40Gb/s (QSFP) interfaces can be connected together as flexible stacking ports.

  1. Configure the intended ports for stacking in Dashboard under Switch > Configure > Switch ports:
  2. Connect the switch stack via the intended stacking ports like the image shown in step 4.
  3. Navigate to Switch > Monitor > Switch stacks.
  4. Configure the switch stack in Dashboard. If Dashboard has already detected the correct stack under Detected potential stacks, click Provision this stack to automatically configure the stack.
    Otherwise, to configure the stack manually:
    1. Navigate to Switch > Monitor > Switch stacks.
    2. Click add one / Add a stack:potentialstack.png
    3. Select the checkboxes of the switches you would like to stack, name the stack, and then click Create.:add_one_stack.JPG
  5. Disconnect all but one switch's uplink, which will be the uplink for the switch stack.
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Last modified
21:09, 6 Mar 2017



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