Articles by tag "network troubleshooting"

1. Brocade Switch Reset: The Complete Troubleshooting & Recovery Guide
   Selene Gong

   35
   Resetting a Brocade switch (now RUCKUS ICX series) is a common task during troubleshooting, configuration recovery, or repurposing equipment. However, the exact reset method depends heavily on your scenario—incorrect operations may wipe the configuration or even break the boot sequence. This ...
2. Extreme 5320 SFP Module Troubleshooting: Resolving Compatibility and Configuration Issues
   Selene Gong

   38
   For network administrators, IT engineers, and procurement managers overseeing enterprise-grade infrastructure, the Extreme 5320 Universal Switch Series is a reliable choice, providing high-performance, secure, and scalable network connectivity. However, when an Extreme 5320 fails to recognize an ...
3. Cisco 9300 Password Recovery Guide – Step-by-Step Safe Procedure
   Selene Gong

   38
   Getting locked out of a Cisco Catalyst 9300 switch can be stressful, especially if it’s a production device or part of a StackWise deployment. Fortunately, recovering a lost password on a Cisco 9300 or 9300L running IOS XE is straightforward if you follow the correct procedure. This guide will ...
4. Why is Cisco Secure Cloud VPN Slow with SMB?
   Selene Gong

   36
   Accessing company file shares over Cisco Secure Cloud VPN (also known as Cisco AnyConnect or Cisco Secure Client VPN) can sometimes feel painfully slow, especially when dealing with SMB (Server Message Block) file transfers. This performance issue affects IT administrators, remote employees, and ...
5. Network Port Lights Meaning: Troubleshooting Ethernet LEDs
   Selene Gong

   34
   Understanding the lights on your network or Ethernet ports is essential for maintaining a stable and reliable network. For enterprise IT teams and engineers using Router-switch devices, these LEDs are often the first indicator of network health. This guide explains what each light means, how to ...
6. Mastering VLAN Configuration on HPE Switches | Prevent Downtime & Ensure Server Connectivity
   Selene Gong

   32
   For many mid-sized enterprises, expanding network capacity by adding new VLANs on HPE switches is a routine task. Yet even experienced IT teams can run into unexpected connectivity issues if VLANs are misconfigured. Critical servers may become unreachable, departmental workflows can stall, and ...
7. What Happens When a Cisco Switch Receives a Frame with an Unknown Destination MAC?
   Selene Gong

   36
   When troubleshooting unexpected traffic flooding or reviewing switch behavior during a network audit, one question comes up repeatedly: What does a Cisco switch actually do when it receives a frame whose destination MAC address is not in its MAC address table? On the surface, this looks like a ...
8. Cisco IOS Interface IP Changes Not Working? Steps to Apply and Verify
   Selene Gong

   34
   You have just entered the commands to change an IP address on a Cisco IOS interface, but the network isn't responding as expected. This is a common scenario for network administrators. While entering the ip address command is the first step, it is often not the last. The direct answer to the ...
9. When to Touch OSPF and BGP in Enterprise Networks: Change Frequency, Risk, and Design Implications
   Selene Gong

   36
   In enterprise networks, OSPF (Open Shortest Path First) and BGP (Border Gateway Protocol) are the backbone Layer 3 routing protocols that ensure efficient data forwarding and connectivity. Because these protocols are inherently stable, many network administrators adopt a "set it and forget it" ...
10. Cisco Router Commands Cheat Sheet for Network Engineers: A Practical Guide for Troubleshooting and Operations
    Selene Gong

    32
    In modern enterprise networks, managing Cisco routers efficiently requires more than just basic CLI familiarity. With increasing demands from hybrid cloud environments, high-bandwidth applications, and distributed infrastructures, network engineers must be able to troubleshoot quickly, validate ...