• SonicOS 7.0
• High Availability
  • About High Availability
    • High Availability Terminology
    • High Availability Modes
    • High Availability Encryption
    • Crash Detection
    • Virtual MAC Address
    • Dynamic WAN Interfaces with PPPoE HA
    • Stateful Synchronization with DHCP
    • Stateful Synchronization with DNS Proxy
    • About HA Monitoring
  • About Active/Standby HA
    • Benefits of Active/Standby HA
    • Working of Active/Standby HA
  • About Stateful Synchronization
    • Benefits of Stateful Synchronization
    • How Does Stateful Synchronization Work?
    • Example of Stateful Synchronization
  • Active/Standby Prerequisites
    • Supported Platforms and Licensing for HA
    • Physically Connecting Your Security Appliances
  • Maintenance
    • Removing an HA Association
    • Replacing a SonicWall Security Appliance
      • Replacing an HA Primary Unit
      • Replacing an HA Secondary Unit
• High Availability Status
  • Active/Standby High Availability Status
    • High Availability Status
    • High Availability Config
    • High Availability Licenses
• Configuring High Availability
  • Configuring Active/Standby High Availability Settings
  • Configuring HA with Dynamic WAN Interfaces
• Configuring High Availability in the Cloud Platform
  • Set up an Active/Standby High Availability Configuration Using Azure
    • Install the Custom Template
    • Enable Identity of Both Virtual Machines (HA1 and HA2)
    • Role Assignment
    • Check the Networking Tab
    • Configuring Active NSv Firewall Using the Associated Public IP
    • Configuring Standby NSv Firewall Using the Associated Public IP
    • Enable the L3 Mode
    • Configuring Active NSv Firewall Using the Floating Public IP
    • Configuring HA to Active/Standby with L3 HA link
    • Adding Additional Floating Public IP
• Fine Tuning High Availability
  • Advanced Settings
  • Configuring Advanced High Availability Settings
• Monitoring High Availability
  • Configuring Active/Standby High Availability Monitoring
  • IPv6 High Availability Monitoring
  • IPv6 HA Monitoring Considerations
• Azure Use Cases
  • Use Case 1: Manage Azure HA Firewall
  • Use Case 2: Forward LAN traffic to the External Network through the Gateway after HA Failover
  • Use Case 3: Configure DNAT on Azure HA Firewall
  • Use Case 4: Configure DNAT on Azure HA Firewall (Need to move multiple floating IPs support)
• SonicWall Support
  • About This Document

Physically Connecting Your Security Appliances

For complete procedures for connecting your Security Appliances, see the Quick Start Guide for your Security Appliance.

If you are connecting the Primary and Secondary Security Appliances to an Ethernet switch that uses the spanning tree protocol, be aware that it may be necessary to adjust the link activation time on the switch port to which the SonicWall interfaces connect.<![CDATA[ ]]>

High Availability requires additional physical connections among the affected SonicWall Security Appliances.

In any High Availability deployment, you must physically connect the interfaces of all units to the appropriate switches.

It is important that the X0 interfaces from all units be connected to the same broadcast domain. Otherwise, traffic failover does not work. Also, X0 is the default redundant HA port; if the normal HA Control link fails, X0 interfaces are used to communicate heartbeats between units. Without X0 in the same broadcast domain, both units would become active if the HA Control link fails.

If X0 interfaces are not used to communicate, the units should be connected directly to each other.

SonicOS Security Appliances now allow heartbeats to be exchanged between an HA pair across the MGMT interface in addition to the HA control interface.

A WAN connection to the Internet is useful for registering your Security Appliances on MySonicWall and for synchronizing licensing information. Unless live communication with SonicWall's licensing server is not permitted due to network policy, the WAN interface should be connected before registration and licensing are performed.