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Cisco Meraki Documentation

MG21/21E Technical Specifications

Connectivity is critical for any organization that depends on reliable internet access in order to function. Wireless WAN connectivity options, such as cellular networks, serve as a reliable backup internet uplink in the event of a primary uplink failure. 


The MG21 cellular gateway simplifies the path to wireless WAN connectivity and makes cellular a viable uplink option for many networks. The MG21 acts as a gateway to cellular networks by converting LTE signal from a cellular provider to an Ethernet handoff, which can be used as an internet uplink for a variety of use-cases.



  • 300 Mbps CAT 6 LTE Integrated modem
  • Supports 2 separate downstream router connections
  • Small form factor
  • PoE or DC powered
  • IP67 rating
  • Manageability from the Cisco Meraki dashboard
  • Self-configuring Cellular Gateway
  • Automatic firmware upgrades with scheduling control
Remote Diagnostics
  • Email, SMS and Mobile push notification alerts
  • Ping, traceroute, cable testing, and link failure detection with alerting
  • Remote packet capture
  • Combined event and configuration change logs with instant search

The MG21 celluar gateway uses 6 to 8 megabytes a day of data for telemetry on dashboard and connection monitoring when the unit is idle. Any additional Cisco Meraki devices that are added to the MG21 may increase data usage further. Cisco Meraki products are cloud connected devices that report telemetry into Dashboard for network monitoring purposes.

Use Cases

Note that the following use-cases refer to using a Meraki MX appliance with the MG21 as a WAN uplink. However, the use-cases can also apply to non-Meraki devices.

  • Antenna placement where cellular coverage is best 
    • Signal strength is key for cellular performance. The MG21 makes cellular a viable option in situations where the best location for the MX is not necessarily the best location  for a strong cellular signal. The separation of cellular antenna and MX expands cellular options for all networks, particularly for mid-range MXs mounted in a data center.
  • Primary WAN
    • In areas where wired internet services are not available, the MG21 provides a simple, viable option for wireless WAN connectivity.
  • Secondary WAN for Failover
    • An MX's secondary WAN interface connected to an MG21 may use the cellular network in the event of a primary uplink failure.
  • Secondary WAN for SD-WAN
    • An MX with an MG21 as a secondary WAN uplink may use the cellular network to establish VPNs for SD-WAN.
  • High Availability Uplink
    • The MG21 can be used as either a primary or secondary internet uplink for MX HA topologies. Its two LAN ports allow the MXs to share access to the same cellular network.

Technical Breakdown

Physical Specifications




Dimensions (w x d x h)

160.45 x 160.45 x 34.45mm

165.7 x 160.45 x 34.45mm 

Weight (without accessories)



Power Supply

12V/1A, 48-57V DC/0.35A

12V/1A, 48-57V DC/0.35A

Power Load 10 Watt Maximum (PoE 802.3AF) 10 Watt Maximum (PoE 802.3AF)

Operating Temperature

-22°F to 122°F (-30°C to 50°C)

-22°F to 122°F (-30°C to 50°C)


5% to 95% non-condensing

5% to 95% non-condensing


LAN Interfaces 2x GbE
WAN Interfaces 1x CAT 6 LTE cellular modem
SIM Card Slot Nano (4FF)


  North America Worldwide
FDD-LTE  2, 4, 5, 12, 13, 17, 29

1, 3, 5, 7, 18, 19, 20, 26, 28

TDD-LTE   38, 39, 40, 41
TD-SCDMA Bands   34 (Band A), 39 (Band F)
HSPA+ BC2(1900), BC4(1700), BC5(850) BC1(2100), BC3(1800), BC5(850), BC6(800), BC8(900)
GSM Bands 850, 900, 1800, 1900 900, 1800
Standard 300 Mbps CAT 6 LTE 300 Mbps CAT 6 LTE
CA 2xDL-CA up to 40Mhz: 2+17, 4+17, 2+29, 4+29, 4+5, 2+5 2xDL-CA up to 40Mhz: 3+20, 3+8, 7+20, 1+8, 1+5, 3+5
Certifications PTCRB (US) RCM (ANZ, APAC), GCF (EU)
Tested Carriers AT&T (United States), Verizon (United States), T-Mobile (United States) Rogers (Canada), Telus (Canada) Deutsche Telekom (Germany), Sunrise (Switzerland), Vodafone (NZ, UK, Germany, Ireland), Telstra (Australia), Optus (Australia),  NTT docomo (Japan), KDDI (Japan)

Carrier compatibility is generally based on having compatible bands on the modem. In the open market, carriers may only require regulatory domain certifications and open market certifications, like the PTCRB and GCF, to be compatible for their network. Sometimes carriers will require additional testing before a device can be used on their network. The section Tested Carriers is based on Meraki device certifications being approved by those specific carriers. A carrier being listed above means that they have officially certified the Meraki product for their cellular network. There maybe many unlisted carriers could be functionally compatible with Meraki devices. The list of tested certified carriers is based on the carrier validating Meraki per their network parameter requirements. If a carrier you are looking to use is not listed above, it could be that they do not require additional compliance testing for their network.  

MTBF Rating 


MTBF at 25°C


MG21E 2,689,019

Ordering Guide

To place an order for an MG cellular gateway, pair a specific hardware model with a single license (which includes cloud services, software upgrades and support). For example, to order an an MG21E with 3 years of enterprise licensing for use in North America, order an MG21E-HW-NA with LIC-MG21-ENT-3Y. A lifetime warranty with advanced replacement is included on all MG hardware (excluding accessories) at no additional cost. 


Model SKU Description
MG21-HW-NA Meraki MG21 Cellular Gateway – North America
MG21-HW-WW Meraki MG21 Cellular Gateway – Worldwide
MG21E-HW-NA Meraki MG21E Cellular Gateway External Antennas – North America
MG21E-HW-WW Meraki MG21E Cellular Gateway External Antennas – Worldwide


License SKU Description
LIC-MG21-ENT-1Y Meraki MG21 Enterprise License and Support, 1YR
LIC-MG21-ENT-3Y Meraki MG21 Enterprise License and Support, 3YR
LIC-MG21-ENT-5Y Meraki MG21 Enterprise License and Support, 5YR
LIC-MG21-ENT-7Y Meraki MG21 Enterprise License and Support, 7YR
LIC-MG21-ENT-10Y Meraki MG21 Enterprise License and Support, 10YR


Accessory SKU Description
MA-PWR-30W-XX Standard power adapter. Regional plugs per SKU.
MA-INJ-4 Gigabit 802.3at PoE injector
MA-PWR-MV-LV Low Voltage Power Converter
MA-ANT-C1-A Dipole Antenna pair included with MG21E
MA-ANT-C1-B Patch Antenna for the MG21E

Note: Non-Meraki antennas are not supported. The socket is a reversed RP-SMA that is designed to detect the official MG smart dipole antennas and smart patch antenna. The usae of non-Meraki accessories may damage the MG and degrade performance. The Cisco Meraki antennas are designed for the maximum allowable gain without exceeding the EIRP for local regulatory domains on their supported bands.


MG warranty coverage periods are as follows:

Product Warranty Period Warranty Information 



Full lifetime hardware warranty with next-day advanced replacement included.

Applies to MG21 and MG21E hardware

MG Accessories

1 Year

The following are considered accessories: 

Includes mounting kits, antenna, and additional power cords

Additional warranty information can be found on the Return Policy and Requesting a RMA page of the Cisco Meraki website. 

If your Cisco Meraki device fails and the problem cannot be resolved by troubleshooting, contact Meraki Support to address the issue. Once support determines that the device is in a failed state, they can process an RMA and send out a replacement device free of charge. In most circumstances, the RMA will include a pre-paid shipping label so the faulty equipment can be returned. 

In order to initiate a hardware replacement for non-functioning hardware that is under warranty, you must have access to the original packaging the hardware was shipped in. The original hardware packaging includes device serial number and order information, and may be required for return shipping.

Meraki MG21 and MG21E devices have been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. 


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