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Feature Description High Availability (HA)

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Table of Contents
  • Introduction
  • Advantages of High Availability (HA)
  • Prerequisites
  • HA Issues on VMware
  • HA Components
  • Set Up HA
    • Set the Partner Shared Secret
    • Set up the First Unit
    • Set up the Second Unit
    • Enable the 'Use for HA Checks' Option
    • Test Failover
  • Performing a Firmware Update on HA Pairs
  • HA WUI Options
    • Partner Communications
    • HA and Clustering
      • Interfaces
      • HA Parameters
  • Troubleshooting
    • General Troubleshooting Tips
    • Confirm Settings
      • Further Details about IGMP Snooping and PortFast
    • Battle for Primary with NTP Configured (Hardware Only)
    • No HA Status Squares are Visible in the WUI
    • Green/Red HA Status Squares
    • Blue HA Status Square
    • Both Units are Active and the WUI is Unresponsive – Blue or Red Status Square
    • Gray HA Status Square
    • Virtual Services Temporarily Unavailable After Failover
    • No Access to WUI on HA1/2 or Shared
    • Nothing Works
    • Synchronization Issue After Unbonding/Bonding an Interface
    • Log Messages Explanations
  • Replacing Hardware HA Units
  • Replacing Virtual HA Units
  • References
Table of Contents

References

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  • Last Updated: June 18, 2025
  • 1 minute read
    • LoadMaster
    • LoadMaster LTSF
    • Documentation

Other useful documents are as follows:

LoadMaster HA for Azure Installation Guide

LoadMaster HA for AWS Installation Guide

Web User Interface (WUI) Configuration Guide

Feature Description LoadMaster Clustering

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