Articles by tag "network troubleshooting"

1. How to Reset the Configuration on an HPE J9729A (Aruba 2920-48G-POE+) Switch
   Selene Gong

   29
   Resetting your HPE J9729A (Aruba 2920-48G-POE+) switch can help resolve configuration issues, prepare the device for redeployment, or clear forgotten passwords. This guide will walk you through step-by-step methods to clear configurations safely using both CLI commands and the physical reset ...
2. Cisco Command to See SFP Module: A Guide for Network Engineers
   Selene Gong

   27
   Small Form-Factor Pluggable (SFP) modules are essential transceivers used in Cisco switches and routers to connect devices via fiber or copper cables. Knowing how to view SFP module details helps network engineers verify installation, monitor performance, troubleshoot issues, and maintain ...
3. Juniper Switch Factory Reset Guide: Step-by-Step Methods, Default Passwords & Troubleshooting
   Selene Gong

   28
   At some point, every network engineer or IT administrator faces a familiar challenge: a Juniper switch that needs a fresh start. Maybe you’ve forgotten the admin password, inherited second-hand equipment, or are preparing devices for a new deployment. In these cases, the quickest solution is ...
4. Common Causes of Native VLAN Mismatch Errors and How to Fix Them
   Selene Gong

   19
   Network stability is critical for enterprise and data center environments. One subtle yet potentially disruptive issue is a Native VLAN mismatch, which can cause misrouted traffic, intermittent connectivity, and even security vulnerabilities like VLAN hopping. This article explains the concept, ...
5. How to Console into a Cisco Switch: Step-by-Step Guide for Engineers
   Selene Gong

   20
   When a network goes down, Wi-Fi is offline, and remote SSH access is unavailable, the console port becomes the ultimate fallback. For network engineers, IT administrators, and system integrators, mastering physical console access is fundamental to troubleshooting, initial configuration, and ...
6. CRC Errors in Enterprise Network Switches: Causes, Troubleshooting, and Strategic Decisions
   Selene Gong

   21
   Your network dashboard shows all links are up. LEDs blink green, yet users complain: “File server is slow,” “VoIP calls drop,” or “Database connections time out.” CRC (Cyclic Redundancy Check) errors are silent performance killers. Unlike a hard link failure, data reaches the switch ...
7. Aruba CX Series Factory Reset (6100, 6200, 6300, 6400): The IT Administrator’s Complete Guide
   Selene Gong

   19
   What do you do when a critical Aruba CX 6200 switch in a remote office is locked, and your deployment deadline is tomorrow? Or perhaps you just received a refurbished Aruba 6300, and the previous admin credentials are lost. For IT administrators, network engineers, and system integrators, these ...
8. Huawei Switch Factory Reset Guide (S-Series & CloudEngine): Safe Methods, Password Recovery, and Deployment Best Practices
   Selene Gong

   19
   Factory resetting a Huawei switch is one of those tasks every network engineer eventually faces—whether you're locked out due to a forgotten password, re-deploying refurbished units, troubleshooting unstable configurations, or preparing devices for a new branch rollout. Huawei switches run on ...
9. Mastering the UniFi AP Factory Reset: A Practical Troubleshooting Guide (U6-Lite, U6-LR, AC-Pro & More)
   Selene Gong

   19
   A factory reset is often the quickest way to recover a UniFi Access Point (AP) when it becomes unresponsive, stuck in an adoption loop, or still believes it is managed by an old controller. Whether you're working with an AC-Lite, AC-Pro, U6-Lite, or U6-LR, the reset process is nearly the ...
10. Mastering Dell Switch Factory Reset: Complete Guide for N-Series, PowerSwitch S-Series, and OS10 Devices
    Selene Gong

    19
    Searching for a Dell switch factory reset usually stems from an urgent operational need. Users often require a full reset for advanced troubleshooting, redeployment, or preparing a device for resale. Devices like Dell PowerConnect 3400s, N2000s, or S4148-ON may need a factory reset to delete all ...