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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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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…
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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…
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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+…
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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…
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SWT – VLAN Ingress Check
Overview The VLAN Ingress Check is a network security and traffic control mechanism on Nebula-managed switches. It ensures that only traffic belonging to VLANs (Virtual LANs)assigned to a specific port is accepted. If a packet enters a port that is not a member of the VLAN it claims to belong to, the switch drops that…
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I no longer want to configure my switch via NCC. Can I only configure the switch via local web GUI?
Yes. Starting from firmware version 4.90 and above, switches support full configuration access via the local web GUI even while they remain in cloud mode. This means: You can configure and manage the switch locally through its web interface. The switch will still appear in Nebula and report its status, but configuration…
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Introducing Port Advisor: Centralized Wired Network Diagnostics in Nebula Pro Pack License
With the release of Nebula 19.10,Zyxel brings Port Advisor, a Pro Pack-exclusive feature, to simplify wired network troubleshooting. Designed to be the wired equivalent of Wireless Health, Port Advisor provides a single-pane-of-glass view into potential anomalies occurring across your switches. This article will walk you…
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Zyxel XMG-2230 Series: High-Performance L3 Access Switches with Flexible Power and Smart PoE
Zyxel Networks is excited to introduce the XMG-2230Series, the newest addition to our Layer 3 access switch lineup, engineered to deliver multi-gigabit performance, flexible PoE, and advanced power management capabilities. Built on the new FiOS firmware trunk, the XMG-2230 is ideal for modern enterprise networks that…
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How does Port Advisor work?
Port Advisor monitor your switch and alert you with these anomalies: PoE Detection PoE Detection Trigger Criteria PoE Overload When PD requests power exceeding the maximum power the switch is allowed to provide Example: Switch port 10 settings include PoE maximum power at 15 watts. IP Camera connects to port 10 requesting…
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What is Port Advisor?
A one-page view in NCC that highlights any network abnormalities occurring in the wired network of your Nebula Site Monitors the following abnormalities: Unexpected network loops via Loopguard Unauthorized switch connection via BPDU guard Faulty cables via CRC errors High broadcast/multicast volume via Storm Control…
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How to Check if My Zyxel Device is Under Warranty
You can check the warranty status of your Zyxel device by visiting the appropriate support link based on your region: Europe: Warranty Enter your device's serial number in the provided field, and then Click Check button to verify the warranty status. Asia (Taiwan): 送修流程說明 Follow the instructions provided in the post for…
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How to SSH to the switch in Nebula?
In device list of Nebula you can find "Remote SSH" in live tools and click "Establish" button then can create the SSH session to the device. Please note that this is the Pro pack feature. Copy the remote session IP and then use the terminal software like Tera term or MobaXterm. Login credential should be found in site-wide…
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Why doesn't Nebula display port utilization and switch status information?
If you haven't logged in to the Organization over 30 days, NCC has deactivated the collection of the traffic status (except for the device's event log for troubleshooting) to conserve bandwidth & cloud resources. You may disable cloud-saving mode and NCC will resume date collection.
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Cloud Stacking Enhancements in Nebula 18.30: Improved Port Configuration Retention
Cloud stacking is a powerful feature in Nebula that allows network administrators to manage multiple switches as a single logical unit. However, previous versions of Nebula had a limitation: removing a switch from the stack erased all port settings for that switch, leading to frustration when replacing that slot. With the…
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Enhancing Management VLAN Control in Nebula 18.30
Effective VLAN management is crucial for network stability and security. One common issue Zyxel users face is the misunderstanding of Management VLAN behavior—especially how it differs from the standard trunk Allowed VLAN list. With Nebula 18.30, we've made several key enhancements to Management VLAN Control, making it…
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How to Disable Firmware Update Notifications.
Question: Where can I switch off firmware update notification? Answer: To stop receiving firmware update messages, you can change the firmware type to "stable". Here are the steps to do that: * Go to the site-wide settings. * Navigate to "Firmware Management". * Change the firmware type to "stable". Following these steps…
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When Is the Nebula Firmware Review Conducted?
Question: When is the firmware status review for Nebula conducted each year? Is it around the same time? Answer: Yes, the firmware status for Nebula devices is reviewed once a year. This review determines if an update is necessary based on the current stable firmware version.
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Cloud Stacking Wizard Refresh Button
The latest Zyxel update introduces an enhanced Refresh Button within the Cloud Stacking Wizard in the Nebula Control Center (NCC). This feature simplifies the stacking configuration process by providing real-time updates on switch status, making it easier to set up and monitor cloud-stacked switches. Overview of the Cloud…
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Cloud Stacking Slot Offline Alert
With the NCC 18.20 update, Zyxel has introduced a Cloud Stacking Slot Offline Alert feature, enabling real-time monitoring and notifications for cloud-stacked switches. This alert system notifies administrators if any member of a cloud stack goes offline, allowing proactive management and quick troubleshooting to maintain…
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Why XS1930 shows "server certificate has been failed" when I update access Layer 3 license status?
There are two possible reasons for this issue: Your switch system time is not up to date. Please correct the system time or synchronize with the time server. Your firewall might block ports 80(HTTP)/443(HTTPS). Please allows these ports on your firewall.