Meraki MG Cellular Gateway: Failover and Backup Connectivity

Internet connectivity is critical infrastructure. When your primary connection fails, operations stop. Employees can’t access cloud applications. Customers can’t reach you. Transactions don’t process. Every minute of downtime costs money.

Yet most organizations rely on single internet connections. They have gigabit fiber or cable carrying all traffic with no redundancy. If that connection fails, there’s no backup.

The Cisco Meraki MG cellular gateway solves this problem. It provides automatic LTE failover—seamless backup connectivity when your primary connection goes down. For organizations where connectivity is critical, cellular backup transforms unavoidable downtime into a managed inconvenience rather than a business crisis.

Understanding when Meraki MG solutions make sense, how they work, and how to deploy them helps organizations build resilient networks supporting business continuity without excessive cost.

Why Internet Connectivity Fails

Internet service providers are generally reliable. However, failures happen more often than organizations realize.

Common Causes of Outages:

1. Physical damage (construction, weather, accidents cutting fiber or cables)
2. ISP equipment failure (routers, switches, provider infrastructure)
3. Planned maintenance windows requiring temporary shutdowns
4. Congestion overwhelming capacity during peak usage
5. Routing issues affecting traffic flow
6. Regional outages affecting entire geographic areas

Major providers experience significant outages annually. In 2024, single-region events impacted hundreds of thousands of customers. When these happen, businesses without backup connectivity simply go offline. No workarounds. No partial service. Complete outage.

The Financial Impact of Downtime

Downtime costs far more than most organizations realize. A one-hour outage at a mid-market company typically costs:

• Lost productivity (employees unable to work)
• Lost sales (transactions can’t process)
• Reputation damage (customers perceive unreliability)
• Emergency response costs (expedited restoration fees)
• Potential SLA violations (compliance penalties)

For some businesses, a single hour of downtime costs hundreds of thousands of dollars. The math becomes simple: investing in backup connectivity is cheaper than risking even one extended outage.

Connectivity Backup Options

Organizations typically choose one of three approaches to handle connectivity redundancy.

Option 1: Single Connection (Most Common)

• Risk: Complete outage if connection fails
• Cost: None (only primary connection)
• Reality: Unacceptable for critical operations

Option 2: Dual Wired Connections

• Benefit: Geographic redundancy
• Cost: Expensive ($2,000-5,000/month+ for second provider)
• Limitation: Both may fail during regional outages
• Constraint: Requires both providers serving your location

Option 3: Cellular Backup with Meraki MG

• Benefit: Always available, independent provider
• Cost: Modest ($500-1,000/month cellular + hardware)
• Limitation: Lower bandwidth than wired (sufficient for essential services)
• Advantage: Works anywhere, no geographic constraints

For most organizations, LTE failover through cellular backup represents the best balance of cost, coverage, and reliability. It provides insurance without requiring dual expensive wired connections.

How Meraki MG Cellular Gateway Works

The Meraki MG is a specialized appliance providing LTE or 5G connectivity as backup (or primary) internet connection. Think of it as a cellular-based network bridge integrated directly into your Meraki infrastructure.

Core Components:

• Cellular modem (LTE/5G connectivity)
• Ethernet ports (network connection)
• Standard power supply
• Cloud management (reports to Meraki dashboard)

When connected to cellular network infrastructure, the MG provides internet connectivity through that provider. The integration is seamless—it appears and operates like any other Meraki device in your dashboard.

Automatic Failover Process:

The failover happens automatically with no manual intervention:

1. Primary connection active → Traffic flows through wired connection (fiber/cable)
2. Primary connection fails → System detects no internet connectivity
3. MG failover activates → Traffic automatically routes through cellular connection
4. Users experience brief pause → Typically 5-10 seconds of connectivity interruption
5. Primary connection restores → Traffic automatically returns to primary
6. Failover deactivates → MG returns to standby mode

The entire process occurs in seconds. Users experience a brief pause rather than knowing a failover happened.

Alternative: Load Balancing Mode

Instead of pure failover, MG can also operate in load-balancing mode:

• Primary connection handles primary traffic
• Secondary MG connection handles overflow traffic
• Both connections active simultaneously
• Traffic distributed between both connections

This approach reduces cost per connection while providing failover capability and improved overall capacity.

Meraki MG Models and Capabilities

Cisco offers three MG models optimized for different deployment scenarios.

Model	Throughput	Modems	Best For	Cost
MG55	100 Mbps	Single LTE	Small offices, backup use	Entry-level
MG65	150 Mbps	Dual LTE modems	Regional offices, moderate traffic	Mid-range
MG85	250+ Mbps	Multiple modems + load balancing	Headquarters, mission-critical	Enterprise

MG55: Cost-effective cellular gateway with single LTE modem and 4 Ethernet ports. Appropriate for small offices, temporary locations, and cost-conscious deployments where backup connectivity is primary need.

MG65: Higher performance gateway with dual LTE modems providing automatic failover between cellular providers. Better suited for regional offices with moderate traffic requirements and higher reliability needs.

MG85: Enterprise-grade gateway supporting multiple cellular modems with load balancing, 8+ Ethernet ports, and management capabilities. Designed for headquarters, high-traffic locations, and mission-critical connectivity scenarios.

For failover use cases, MG55 or MG65 typically provide sufficient performance. Backup traffic consists of essential services (email, critical applications) rather than full bandwidth consumption, so maximum throughput is less critical than availability.

Deployment Scenarios

Different organizations implement MG gateways differently based on their specific requirements.

Scenario 1: Primary Internet Backup

Setup: Primary wired connection (fiber/cable) with MG cellular as secondary failover.

Configuration: MX firewall has primary and secondary WAN interfaces. Primary uses wired connection. Secondary uses MG cellular. Traffic automatically fails over if primary connection drops.

Cost: MG55 hardware (~$2,000) + monthly cellular (~$100-200) + setup (~$500) = ~$2,500-3,000 initial + ongoing monthly fees.

Best for: Any organization where downtime creates unacceptable business impact.

Scenario 2: SD-WAN Load Balancing

Setup: Multiple internet connections with Meraki routing balancing across both.

Configuration: Both connections active simultaneously. Traffic distributed between them. If primary fails, all traffic uses backup. Reduces reliance on single connection for redundancy.

Best for: Locations where second wired connection unavailable but higher reliability needed.

Scenario 3: Remote/Temporary Locations

Setup: MG as primary connection when no wired connectivity available.

Configuration: MG provides all connectivity. Sufficient for remote office, temporary installation, or disaster recovery site. Avoids expense of wired connectivity at temporary location.

Best for: Temporary sites, disaster recovery locations, remote offices without wired options.

Critical Considerations for Cellular Deployment

Coverage Verification

Cellular coverage depends on location, provider, building materials, and antenna placement. Before committing to MG deployment:

• Verify cellular coverage at your location using provider coverage maps
• Test actual signal strength at intended antenna location
• Research nearby competitors’ experience with same carrier
• Document expected coverage and performance levels

Poor coverage means poor failover performance. Testing upfront prevents surprises.

Performance Characteristics

Cellular performance differs from wired connectivity:

• Bandwidth: 100-250 Mbps typical (vs. 1+ Gbps wired)
• Latency: 50-100ms typical (vs. 10-30ms wired)
• Consistency: More variable than wired (weather and congestion affect performance)

These characteristics are acceptable for failover backup since you’re only running essential services (email, critical business applications) rather than full bandwidth consumption.

Antenna Placement Impact

Signal strength significantly affects performance:

• External antenna: Best performance, requires roof/exterior access
• Window placement: Good performance, simpler installation
• Internal placement: Poorest performance but simplest installation

External antenna placement should be planned during initial deployment to maximize performance.

Integration with Your Meraki Network

Seamless Dashboard Integration

The MG integrates seamlessly with existing Meraki infrastructure. All devices report to single Meraki dashboard providing:

• Unified management across all connectivity types
• Centralized alerts when connections fail
• Performance monitoring (bandwidth, latency, packet loss)
• Consistent policy application across all connections

MX Firewall Compatibility

MX firewalls natively support MG as a secondary WAN connection. Configuration is straightforward:

1. Configure MX primary WAN (wired connection)
2. Configure MX secondary WAN (connects to MG gateway)
3. Set failover policy (automatic or manual)
4. Monitor both connections from dashboard

SD-WAN Capabilities

Meraki SD-WAN uses MG for intelligent routing:

• Route critical applications through primary connection
• Route best-effort traffic through backup connection
• Automatic failover without manual intervention
• Load balancing across multiple connections
• Application-aware routing based on requirements

Deployment Best Practices

Organizations implementing MG cellular gateways follow proven practices for reliable deployment.

Pre-Deployment Site Survey:

1. Verify cellular coverage using multiple provider maps
2. Test actual signal strength at antenna location
3. Check competitive experience with same carriers
4. Document coverage maps and performance baselines

Antenna Installation:

1. Mount externally if possible (roof or exterior wall)
2. Position away from obstructions (buildings, vegetation)
3. Use highest available point for better signal
4. Document location and orientation for records
5. Test performance before finalizing installation

Configuration Steps:

1. Set primary and secondary WAN in MX firewall
2. Configure failover policy (automatic recommended)
3. Set bandwidth limits if using metered data plan
4. Enable monitoring and alerting in dashboard
5. Test complete failover before declaring ready

Ongoing Monitoring:

• Primary connection uptime and performance
• Backup connection availability
• Failover events (document and analyze)
• Bandwidth consumption patterns
• Data plan usage against billing

Cost-Benefit Analysis

Investment:

• Hardware: MG55/MG65 ($2,000-4,000)
• Monthly cellular: $100-200/month
• Installation and setup: $500-1,500
• First-year total: ~$3,500-6,000
• Ongoing annual: ~$1,200-2,400

Benefits:

• Downtime prevention during primary failure
• Reduced emergency restoration costs
• Business continuity for critical operations
• Seamless customer experience (transparent failover)
• Reduced IT stress and uncertainty

ROI Example:

If your organization experiences one primary outage per year lasting four hours:

• Typical lost revenue/productivity: $50,000
• Annual MG investment: ~$3,000
• MG pays for itself in single avoided outage

For most organizations with critical operations, the investment is negligible compared to even one extended outage.

When Meraki MG Makes Sense

Choose MG Cellular if:

• Downtime is costly to your organization
• Primary connectivity is unreliable
• Mission-critical operations require high availability
• Compliance requires uptime SLAs
• Regional outage risk is concern (MG provides independent connectivity)

Consider alternatives if:

• Non-critical operations where brief outages acceptable
• Dual wired connectivity already deployed
• Minimal outage impact (very low-cost locations)
• Zero cellular coverage at location (MG won’t work)

Getting Help with Cellular Backup

Implementing backup connectivity requires expertise ensuring proper coverage, placement, and integration. Stratus Information Systems helps organizations design and deploy cellular backup solutions including:

• Site surveys verifying cellular coverage and performance
• MG model recommendations matching your requirements
• Professional installation with optimal antenna placement
• Configuration and integration with existing Meraki infrastructure
• Testing and validation of failover procedures
• Ongoing monitoring and support

Meraki MG cellular gateways represent an affordable, reliable approach to connectivity backup. For organizations where downtime is unacceptable, they’re increasingly standard infrastructure. The cost of connectivity insurance is modest compared to the cost of even a single extended outage.

Don’t let internet connectivity be your single point of failure. Contact Stratus to discuss cellular backup solutions protecting your critical operations.