-
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…
-
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…
-
Why Am I Receiving 'Poor Cable Quality' Notifications?
```html'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…
-
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…
-
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…
-
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 * Firmware Outdated: An…
-
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…
-
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…
-
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…
-
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…
-
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…
-
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.,…
-
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.…
-
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…
-
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…
-
What should I do if my network doesn't use VLAN 1 as management VLAN when add a new nebula switch?
Since the switch default management VLAN is VLAN 1, you need to create general interface (no VLAN ID) on your firewall/router first. Here are some steps for the deployment: Configure your firewall with the general interface and VLAN interface. Add your switch to Nebula. Pre-configure your switch on Nebula. Ex. management…
-
What is the ARP/NDP table capacity of the XGS2220 series switches?
Q: What is the ARP/NDP table capacity of the XGS2220 series switches? A: Since ARP/NDP primarily supports packet forwarding, we recommend referring to the L3 forwarding table listed in the product datasheet (2K for IPv4 / 2K for IPv6) as a reference. You can find the detailed specifications in the product datasheet…
-
How to change stacking port mode in stacking mode?
Q: How to change the stacking port mode when the switch is already in stacking mode? A: When a switch is operating in stacking mode, the port mode option is intentionally hidden. This is because the port mode directly affects the stability and reliability of stack communication. To change the stacking port mode, it is…
-
Can the GS2220-28 switch support TACACS+ audit logs, and how do I activate it?
Question: Can the GS2220-28 switch support TACACS+ audit logs, and how do I activate it? Answer: Yes, the GS2220-28 switch can support TACACS+ changes audit logs. Follow the steps below to configure and activate this feature: Log in to the GS2220-28 switch. Navigate to SECURITY > AAA > TACACS+ Server Setup. Under TACACS+…
-
Nebula Auto Naming For Switch Clients
The below table shows that the Nebula switch client page auto naming behavior. Scenario Switch client page With Firewall and/or AP in the same site Will sync the client data from Firewall and AP. If they learn client's name from DHCP process and LLDP, the Firewall/AP and switch will display the client's name. Without…