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Why is the "Schedule Reboot" option greyed out or unavailable in my settings?
Question: Why is the "Schedule Reboot" option greyed out or unavailable in my settings? Answer: The Schedule Reboot and Auto Firmware Upgrade features are mutually exclusive. If you have Auto Update enabled under Firmware Management, the schedule reboot option will be locked. You must disable the automatic firmware updates…
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What happens if the passive device fails to reboot during a scheduled reboot window?
Question: What happens if the passive device fails to reboot during a scheduled reboot window? Answer: If the passive device fails to complete its reboot successfully, the active device will abort the entire process to prevent a network outage. It will reject the scheduled reboot and generate the following system log…
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How does the schedule reboot process work when firewalls are configured in Device HA mode?
Question: How does the scheduled reboot process work when firewalls are configured in Device HA mode? Answer: To prevent network downtime, the scheduled reboot is executed sequentially rather than simultaneously: The active device initiates the process by sending a reboot request to the passive device. The passive device…
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Why is the service status of my HA devices not updating after assigning a license?
Question: Why is the service status of my HA devices not updating after assigning a license? Answer: Make sure the correct serial number associated with your licensed device is configured in the Device HA Pro settings. Navigate to Device HA Pro page in your device's web interface. Enter the correct serial number of the…
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Is there any way to pause the HA failover count?
Question: Is there any way to pause the HA failover count? Answer: We can pause the HA failover count by using the CLI command cmd device-ha failover pause-count disable.
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How to clear the device HA failover count to avoid reaching the maximum failover limit?
Question: How do I clear the device HA failover count to avoid reaching the maximum failover limit? Answer: We can clear the failover count by using the CLI command cmd device-ha failover pause-count clear.
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Device HA Config Apply Behavior
In the latest firmware update, Zyxel has introduced a enhancement to Device HA (High Availability) to address a situation when importing configurations with Device HA enabled to another device. Background Previously, when restoring a backup configuration from a customer site or another device that had Device HA enabled,…
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Device HA: Enhanced Debug Logging Support
With the latest firmware, Device HA on Zyxel firewalls receives a significant enhancement around debug log collection - making troubleshooting HA pairs far more effective and easier to manage. What’s New 1. Persistent Debug Logs When you enable debug logging for DeviceHA, the firewall now writes logs to its flash storage,…
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How do I disable device HA sync when troubleshooting?
Question: How do I disable device HA sync when troubleshooting? Answer: When troubleshooting a firewall issue, you can temporarily disable device HA to disassociate the unit for debugging purposes. To do this, navigate to System > Device HA > HA Configuration and pause the device HA.
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[ATP/FLEX] How to configure and enable Cloud Monitor mode on device HA?
Prerequisites Reset two ATP/USG FLEX firewalls to factory default settings before deploying device HA. Deploy two ATP/USG FLEX firewalls with device HA. Two devices must be the same model. The running firmware partition must the same position on two devices. For example, The running partition of the Active device is…
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Device HA Enhancements in uOS 1.32
High availability (HA) is a cornerstone of reliable network infrastructure, and with uOS 1.32, Zyxel introduces a comprehensive set of Device HA enhancements to improve stability, simplify troubleshooting, and increase visibility into your failover systems. What’s New in Device HA? 1. HA Status LED Indicator The PWR/SY…
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SYS LED Status for Device HA
Question: What is SYS LED status on active device and passive device? Answer:
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How to Pause Device HA?
Question: How to Pause Device HA? Answer: For troubleshooting purpose, you can stop Device HA temporarily without unpairing the active and passive devices to troubleshoot the active device. Follow the steps below. Turn off the passive device or unplug all Ethernet cables except heartbeat port from the passive device. On…
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How to register two USG FLEX H firewalls in Nebula for Device HA configuration?
Question: How can we register two USG FLEX H firewalls in Nebula for Device HA configuration? Answer: To register two USG FLEX H firewalls in Nebula for Device HA, you need to register each firewall to a different site within the same organization. Create two sites within the same organization in Nebula. Assign the primary…
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How to check synchronization state of Device HA on USG FLEX H?
Question: How to check synchronization state of Device HA on USG FLEX H? Answer: usgflex200h> show state vrf main device-ha _debug sync-info
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How to force a full synchronization of Device HA on USG FLEX H?
Question: How to force a full synchronization of Device HA on USG FLEX H? Answer: usgflex200h> cmd device-ha force-sync full OKusgflex200h>
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Device HA (High Availability) in uOS 1.31
Device HA ensures uninterrupted network connectivity by deploying two firewalls in an active-passive setup. If the active device fails or loses connectivity, the passive device takes over automatically to maintain network stability. 1. Requirements of Device HA Requires Same Model & Firmware: Both firewalls must be the…
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Why Did Device HA Sync Fail?
Question: Why did my ATP500 devices fail to sync when setting up Device HA? Answer: The sync failure likely occurred due to overlapping IP subnets between the heartbeat port and the VTI interface. This issue can prevent proper synchronization and even cause problems accessing the Device HA page. Solution: * First, make…
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How to Resolve HA Pro Sync Issue on ATP/USG FLEX?
Question: Why is the HA Pro synchronization failing on ATP/USG FLEX? Answer: Synchronization issues between active and passive devices in HA Pro setups can often be resolved by checking configuration settings. Please follow the steps below: * Make sure the passive device is reset to its default configuration. * Disable any…
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How to access slave device when you use Device HA
Since slave device only online Heartbeat port. To access slave deivce you need to access Management IP you set up on Device HA pro page. For example: You can access slave device by 1.1.1.2