Switch MTU Configuration

Dashboard Location: Switching > Configure > Switch Settings > MTU

Maximum Transmission Unit Management

Switch MTU (Maximum Transmission Unit) configuration in Meraki networks provides administrators with the capability to optimize network frame sizes for enhanced performance, enabling jumbo frame support, reduced fragmentation overhead, improved throughput efficiency, and application-specific packet size optimization. This functionality supports network-wide MTU settings, device-specific overrides, profile-based configurations, and performance tuning for high-bandwidth applications. MTU configuration is essential for storage networks, virtualization environments, high-performance computing clusters, and enterprise applications requiring optimal network throughput.

Diagram

Classes

switch (meraki.domains.organizations.networks)

Name	Type	Constraint	Mandatory	Default Value
mtu	Class	`[mtu]`	No

mtu (meraki.domains.organizations.networks.switch)

Name	Type	Constraint	Mandatory	Default Value
default_mtu_size	Integer	min: `1`, max: `9578`	No
overrides	List	`[overrides]`	No

overrides (meraki.domains.organizations.networks.switch.mtu)

Name	Type	Constraint	Mandatory
switches	List	Any[String[matches: `^[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{4}$`] or String[min: `1`, max: `127`]]	No
switch_profiles	List	String[min: `1`, max: `127`]	No
mtu_size	Integer	min: `1`, max: `9578`	Yes

Examples

Example-1: The example below demonstrates switch MTU configuration using tested YAML configuration from pipeline fixtures.

meraki:
  domains:
    - name: !env domain
      administrator:
        name: !env org_admin
      organizations:
        - name: !env org
          networks:
            - name: !env network_name
              product_types:
                - appliance
                - switch
                - wireless
                - camera
                - sensor
                - cellularGateway
              switch:
                mtu:
                  default_mtu_size: 9100
                  # overrides:
                  #   - switches:
                  #       - !env core_switch_01_serial
                  #     mtu_size: 1500
                  #   - switch_profiles:
                  #       - Default
                  #     mtu_size: 1500