The Lazy Networker

⚙️ About HA in Meraki MX67

• Meraki MX67 supports Warm Spare / High Availability (HA) in Active–Passive mode.
• You need two MX67 appliances (same model) and Advanced Security license for each (or a single shared license if you have Meraki’s per-network licensing).
• The HA works by monitoring uplinks and LAN, and failing over automatically if the primary fails.

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🛠 How to configure HA in Meraki MX67

✅ 1. Physical setup

• Place both MX67 units on the same LAN segment.
• Connect:
  • Each MX to the Internet (same or different uplinks).
  • The LAN ports of both MXs to the same switch or switches.
• Connect the dedicated HA/Spare port (Port 4 on MX67) from the primary to the secondary (this is the Heartbeat connection).

Tip: Make sure the heartbeat cable is direct or via switch but must be in the same VLAN/subnet.

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✅ 2. Configure in Meraki Dashboard

⚠ Both MXs must be in the same network in the Meraki Dashboard.

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✅ 3. WAN configuration

• If you have multiple WAN uplinks, configure WAN1 and WAN2 on both MXs identically.
• Ensure the ISP allows the use of a Virtual IP (VIP).

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✅ 4. LAN configuration

• LAN interfaces should be identical.
• Enable Use MX uplink IPs or configure Virtual IPs:
  • WAN VIP: shared IP that moves between MXs.
  • MX uplink IPs: individual IPs on each MX.

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📊 Failover

• Heartbeat checks happen over the dedicated HA port.
• Failover typically occurs in seconds (about 30 seconds or less).

✅ Verify HA status

• In Dashboard: Security & SD-WAN > Appliance status → Warm Spare status shows which is active.
• You can simulate failover by disconnecting the primary MX uplink.

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🔒 Important notes:

• Meraki MX HA is Active-Passive; no Active-Active.
• Both MXs must be the same model and firmware.
• Heartbeat connection is essential for proper failover detection.
• Use Virtual IP for seamless failover.