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Network Switch Stacking: FAQ and Troubleshooting Guide
Welcome to this guide. This article aims to consolidate the most frequently encountered technical issues and solutions when setting up and maintaining Network Switch Stacking.Before you begin troubleshooting, please ensure your equipment meets the following basic requirements: All switch models support stacking…
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How to Deregister a Device from an Inaccessible Nebula Organization
When a Zyxel device is registered to an old or inaccessible Nebula cloud organization, it must be released before it can be added to a new network. This guide outlines the steps to resolve this using self-service options or official support. Self-Service Override If you have physical access to the device and its label is…
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Troubleshooting Inter-VLAN ACL Configurations on Switches
Inter-VLAN ACL configuration issues on XS3800 core switches (such as policies not taking effect or losing complete access) are typically caused by misconfigured traffic classifiers or the stateless nature of switch ACLs. When the frame format is mismatched or subnet scopes do not align, the switch fails to match and block…
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Troubleshooting Intermittent Nebula Offline Issues on XGS1930 Series Switches
Troubleshooting Intermittent Nebula Offline Issues on XGS1930 Series Switches Intermittent Nebula offline issues on XGS1930 series switches may be caused by network connectivity, DNS settings, or underlying hardware abnormalities. If a switch frequently disconnects from Nebula Control Center (NCC) while remaining…
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How to Troubleshoot Temporary High CPU Usage Logs on Switches
Temporary high CPU usage logs (reaching up to 100%) on XS1930 series switches are often associated with routine diagnostic activities rather than an actual hardware or performance issue. When diagnostic data is being gathered, the switch must process a significant amount of system information, causing a brief and expected…
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Advanced Networking with CX3800 and GS1915 v2 Switch Series
Zyxel Switch Series: Performance and Versatility The latest switch releases focus on enterprise-grade network and SMB flexibility. CX3800 Series: Enterprise Edge Designed for high-demand networks, the CX3800 series offers: * 100G Uplinks: High-speed connectivity for core aggregation. * Ultra PoE: Port 1 to 8 can provide up…
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What is Auto Config Recovery (ACR) and how to unlock it?
FAQ Topic: Auto Config Recovery (ACR) Mechanism What is Auto Config Recovery (ACR)? Auto Config Recovery is a mechanism that detects if a switch goes offline for a certain period after configuration changes are made via the cloud. It assumes that the settings might cause the device to go offline. To prevent further…
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Why Am I Receiving 'Poor Cable Quality' Notifications?
'Poor Cable Quality' notifications in your Nebula Control Center indicate that your connected Ethernet cables may have issues affecting the network performance. This notification is triggered when the device detects signal degradation or potential faults in the cable. How to identify the issue: * Inspect your Ethernet…
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What should I do if Auto Configuration Recovery triggers after a switch configuration change?
If the Auto Configuration Recovery mechanism is triggered after a configuration change, here are the steps you can follow to resolve the issue: Log in to the Switch Management Interface. Check if the switch is currently in Auto Configuration Recovery mode. This might show an alert or status indicating the issue. If…
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Why is the GS1920-24HPv2 Fan Speed Constantly High?
```htmlWhy is the GS1920-24HPv2 Fan Speed Constantly High? Question: The fan on my GS1920-24HPv2 switch is running at full speed (around 9,000 RPM) continuously, creating a loud noise. Temperatures are normal, and the Smart Fan feature is not regulating the fan speed as expected. What should I do? Solution: Based on the…
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Why is my stack switch not showing online on Nebula?
```htmlWhy is my stack switch not showing online on Nebula? If your third stack switch is not showing online on Nebula, the following could be the causes and solutions: Possible Issues: * DHCP Issue: The switch might not be obtaining a DHCP address, which prevents it from connecting to Nebula. * Firmware Outdated: An…
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Port Advisor Enhancements and Intelligent Monitoring
Next-Generation Port Monitoring: Port Advisor Enhancements Nebula 20.00 introduces significant upgrades to the Port Advisor to provide a more intuitive and manageable monitoring experience for network administrators. The Usage Exceeding Bar A primary enhancement is the introduction of the "Usage Exceeding Bar" for…
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Port Advisor Enhancements
Proactive Network Health: Port Advisor Enhancements The Port Advisor tool in Nebula 20.00 has been enhanced to provide more reliable monitoring of wired network health by shifting its diagnostic logic from instantaneous traffic spikes to average rate calculations. Smarter Anomaly Detection The system now utilizes the…
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Cloud Stacking Check Enh.
Enhanced Reliability for Cloud Stacking Management The latest update to Nebula improves the accuracy of cloud-managed switch stacks by refining the status verification process. Active Status Query In previous versions, the Nebula Control Center (NCC) backend might display an outdated stack status, such as showing only two…
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How can I view the restore configuration on a switch?
On Zyxel switches, when performing a warm reboot, users can choose to reboot with Configuration 1 or Configuration 2. However, during a cold reboot (power cycle), the switch will boot using the current active configuration. 1. Via CLI Use the following command: show system-information The output will display the Current…
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Switch Front Panel PoE Mode Button Function
Description The PoE Mode button is used to switch the LED display information of the ports on the front panel. Function Overview When the PoE Mode button is NOT pressed (default) The LEDs display LNK/ACT mode Indicates link status and traffic activity When the PoE Mode button is pressed The LEDs display PoE mode Indicates…
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LAG Enhancements
LAG Enhancements Nebula 19.30 introduces relaxed rules for Link Aggregation (LAG) to provide greater flexibility. New Compatibility Rules * Media Type: This is the only mandatory requirement for aggregation; mismatching (with/without) media types cannot be aggregated. * Relaxed Criteria: Ports with different speeds (e.g.,…
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Display DDMI Multilane Information
Display DDMI Multilane Information Nebula 19.30 enhances visibility for high-speed 100 Gbps transceivers by providing multi-lane DDMI data. Individual Lane Reporting Modern 100 Gbps transceivers are often composed of four 25 Gbps lanes. Previously, DDMI only displayed information for Lane 1 without specific labeling.…
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CX4800-56F FEC Setting Change
CX4800-56F FEC Setting Change Zyxel has implemented a minor terminology update for the CX4800-56F port settings. Terminology Update The port setting previously labeled as "None" has been renamed to "Disabled". This change was made to address translation issues where the word "None" resulted in confusing terms when the…
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CX4800-56F Stacking
CX4800-56F Stacking The CX4800-56F now supports hardware stacking with the release of firmware version 2.00 (patch0). This management capability is available in both on-premise and Cloud modes. Configuration Details * Member Limit: Currently supports a maximum of two units per stack. * Channels: Supports 2-port or 4-port…