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Zyxel Switch DC Power Installation Guide
Precautions: Ensure the DC PSU is disconnected before installation. To reduce the risk of electric shock, properly ground the switch according to the User Guide (page 50 of XMG2230 series for example) before operation. If you cannot verify grounding, contact a certified electrician for assistance. High-voltage DC PSUs and…
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Understanding and Troubleshooting False Poor Cable Quality Alerts in Nebula
Understanding and Troubleshooting False Poor Cable Quality Alerts in Nebula Nebula switches monitor cable health to maintain optimal network performance, but certain power-saving behaviors on connected client devices can sometimes trigger false-positive alerts. Cable Health Trigger Criteria Nebula determines cable status…
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Resolving Yealink W70B Connection Issues on Multi-Gigabit Switches
Resolving Yealink W70B Connection Issues on Multi-Gigabit Switches Yealink W70B DECT phones may experience network connectivity loss when connected to multi-gigabit switches like the XMG1930-30HP, despite receiving Power over Ethernet (PoE). This guide explains the root cause and how to resolve the link negotiation…
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Hardware Failure After Power Outage: How to Process an RMA for Port Failure
Problem Scenario After experiencing unexpected power cuts and power supply fluctuations, a physical port (such as Port 9) on the switch (XS1930-12HP-IOT) has completely stopped functioning, while other ports (like Port 8) continue to work normally with connected devices. Solution: This issue is typically caused by…
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How to Identify and Locate the Source of a Multicast Storm in Zyxel Nebula
Problem Scenario When managing a network, a multicast storm can cause severe latency or even temporary network outages. Administrators often need to quickly filter out and locate exactly which device or port is originating the multicast storm. Solution: Zyxel Nebula provides built-in monitoring tools, including Storm Guard…
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Configuration Loss After Firmware Upgrade (V4.8 to V5.0)
Configuration loss can occur when upgrading Zyxel XGS2220-30HP switch firmware from version V4.80 (ABXO.2) to V5.00 (ABXO.1). After upgrading and restarting, device settings may revert to default, although they are restored if the firmware is rolled back to V4.80. This issue primarily affects devices using configuration…
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Which transceivers are compatible with my switch?
To find out which transceivers are compatible with your switch, please go to the Download Library, download your switch's datasheet, and check the Transceivers table. For example:
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What is the fan connector pin layout on the XS1930-12HP for fan replacement?
The pin order for the fan connector is: PIN1: Red = +12V PIN2: Yellow = Sensor PIN3: Black = GND Please also note: A fan that meets our design specifications will run at low speed when the device is powered on, and will increase speed as the device's internal temperature rises. Some non-spec fans may not start running…
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Can I use third-party modules/transceivers with Zyxel switches?
Q: Can I use third-party modules or transceivers with Zyxel switches? A: We strongly recommend using official Zyxel modules/transceivers to ensure optimal performance, full feature compatibility, and long-term network stability. Please note the following: Stability & Compatibility: Non-Zyxel transceivers are not fully…
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How to connect to the Web GUI (Default IP: 192.168.1.1) and troubleshooting
To access the web management GUI of a device with the default IP 192.168.1.1, please follow these steps: Physical Connection: Connect your PC to the device using a Cat.5 or Cat.5e Ethernet cable. Subnet & IP Setup: Ensure your PC is in the same subnet (192.168.1.0/24). You can configure a static IP (e.g., 192.168.1.x/24,…
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Why Does LibreNMS Detect a Zyxel Switch as a ZyWALL, and How to Correct It?
Why is my Zyxel switch (XMG/GS/XGS/CX series, etc.) identified as a ZyWALL instead of a ZyXEL Ethernet Switch in LibreNMS? Root cause: The XMG/GS/XGS/CX series are missing from LibreNMS OS detection. Please follow the steps below to update both configuration files (zynos.yaml and zywall.yaml). Here, the XMG series is used…
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What happens to the local GUI once the switch is connected to and managed by Nebula?
Once a NebulaFlex switch connects to the Nebula Control Center (NCC) and enters Cloud Management mode, its local Web GUI behavior changes. The setup wizard is no longer available, and the local advanced menu is limited to a focused set of basic troubleshooting and maintenance options (such as VLAN configuration), rather…
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GS1900-24 Firmware Upgrade Guide_Upgrading from v2.20 directly to Latest v2.90
Direct Upgrade Supported: The GS1900-24 switch running the older firmware version 2.20 can be updated directly to the latest version 2.90. Web UI Compatibility Issue: Due to the age of version 2.20, compatibility issues may occur with modern web browsers, causing the Web UI under [Maintenance] -> [Firmware] to render…
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Why is ZON functionality limited to Layer 2 environments?
```htmlWhy is ZON functionality limited to Layer 2 environments? The ZON (Zyxel One Network) utility was primarily designed for use in Layer 2 or single-domain environments. It focuses on small-scale deployments where device discovery, provisioning, and maintenance take place within the same broadcast domain. This means…
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How to Download the Zyxel ZON Utility?
```htmlHow to Download the Zyxel ZON Utility? To download the Zyxel ZON Utility, follow these simple steps: * Visit the Zon Utility Download Page. * Scroll down on the page to locate the contact information form. * Fill out your contact information in the form and click on 'Submit'. * Once submitted, Zyxel will email you…
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What to Do When PoE Stops Working After a Power Surge?
```htmlWhat to Do When PoE Stops Working After a Power Surge? It seems that the PoE (Power over Ethernet) section of your GS1900-10HP switch may not function properly after a power surge. While the switch continues to provide its regular switching functions, PoE functionality might be impaired. Here's what you can do to…
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Why should you use Zyxel GBICs to ensure stability?
```htmlBased on the reported issue, multiple ports (e.g., 1/44, 1/49, 1/50, etc.) showed abnormal CRC error records, and the GBICs in use were not Zyxel products. The environment's stability depends heavily on ensuring compatibility and optimal performance of hardware components. Using Zyxel GBICs is recommended for the…
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How to Resolve Connectivity Issues with Virtual IP in Windows NLB Multicast Mode
```htmlHow to Resolve Connectivity Issues with Virtual IP in Windows NLB Multicast Mode If you're experiencing connectivity issues with a virtual IP in a Windows NLB multicast mode setup, the following steps can help you resolve the problem: * Configure a 'Static Multicast Forwarding By MAC' entry for the NLB multicast MAC…
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How to check if the Zyxel switch sends the logs to syslog server?
Please try the following troubleshooting steps: Test Connectivity: Navigate to Maintenance > Diagnostic in the web GUI and attempt to ping the syslog server directly from the switch to confirm there is a valid path. Check Local Firewall (if you change syslog port): Confirm that the Linux system's firewall is explicitly…
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What RFC is Zyxel switch syslog using?
Q: What RFC is Zyxel switch syslog using? A: It is RFC3164.