Computer Network - Electrical Technology

Commands for troubleshooting SFP optical levels OTDR test

February 13, 2026 by Electrical Technology

Commands for troubleshooting SFP optical levels OTDR test:To troubleshoot a link flapping port that has been err-disabled, use these diagnostic tools to isolate whether the fault lies in the fiber optics or the copper cabling. Fiber Troubleshooting: SFP Optical Levels Use Digital Optical Monitoring (DOM) to check the “light levels” of your fiber transceivers. This identifies if …

[Solved]link flap cisco switch port error disabled

February 13, 2026 by Electrical Technology

link flap cisco switch port error disabled: A Cisco switch port enters err-disabled state due to link flapping when the interface toggles up/down rapidly (typically 3+ times within 10 seconds), often caused by faulty cables, SFP modules, or speed/duplex mismatches. link flap cisco switch port error disabled To resolve, inspect physical Layer 1 components, swap …

[Solved]Sibling Issue in Cisco Switch

February 13, 2026 by Electrical Technology

Sibling Issue in Cisco Switch: Based on Cisco documentation, the error message %SYS-4-CHUNKSIBLINGSEXCEED: Number of siblings in a chunk has gone above the threshold refers to a scenario where a memory chunk (part of the IOS memory management system) has too many sub-blocks (“siblings”) allocated. Sibling Issue in Cisco Switch This is usually a memory …

Native VLAN Mismatch Smart port enabled in Cisco switches CBS 350

February 13, 2026 by Electrical Technology

Native VLAN Mismatch Smart port enabled in Cisco switches CBS 350: Smartport is a Cisco feature that automatically applies a set of preconfigured commands (called macros) to a switch port when it detects a specific type of device, such as an IP phone, printer, or wireless access point. How it Works smartport in CBS 350 …

[100% Working]password complexity disable cisco CBS 350

February 13, 2026 by Electrical Technology

password complexity disable cisco CBS 350: In newer firmware for the Cisco CBS350 (specifically version 3.2.0.84 and later), Cisco introduced “Mandatory Password Rules” that cannot be disabled via the Web GUI or the CLI to improve device security. Why password complexity disable cisco CBS 350 is “Locked” Firmware Updates: Version 3.2.0.84 updated the security posture. …

[Solved!]VPN not working on mobile data

February 13, 2026 by Electrical Technology

VPN not working on mobile data: If your VPN works on Wi-Fi but fails on mobile data, it is usually due to carrier protocol restrictions or a mismatch between the phone’s networking (IPv6) and the VPN’s server (IPv4). How to solve VPN not working on mobile data Fix the APN (Access Point Name) Protocol Many …

Cyber Security Tools for Security Professionals

November 30, 2025 by Electrical Technology

CYBERSECURITY TOOLS FOR SECURITY PROFESSIONALS: Cybersecurity professionals rely on specialized tools to safeguard digital infrastructures, identify vulnerabilities, and mitigate risks. These tools enable proactive defense mechanisms, ensuring the security of sensitive data and critical systems. Cyber Security Tools for Security Professionals This article provides an in-depth exploration of selected cybersecurity tools, categorized based on their …

Service Unavailable Error Sophos Connect VPN- Issue Solved

October 5, 2025 by Electrical Technology

sophos vpn service unavailable issue solved

Service Unavailable Error Sophos Connect VPN: Are you not able to connect to Sophos VPN. One of the possible errors showing is ” Service Unavailable”. Read this post to solve this error in Sophos VPN connect. Sophos Connect VPN Showing Service Unavailable Error The Error looks like the image shown below. In my laptop i …

How to enable telnet in windows 10

January 5, 2023 by Electrical Technology

What is the Telnet command in Windows 10? Telnet is a client-server protocol predating the TCP protocol. The network protocol allows a user to log into another computer within the same network through a TCP/IP connection Is telnet disabled on Windows 10? Telnet Client is not disabled in Windows 10. Telnet is a legacy protocol …

How to enable ping in windows 10

December 11, 2022 by Electrical Technology

How to enable ping in windows 10 Why pings are Blocked or disabled in windows? If you have a firewall enabled in Windows, ping requests are blocked by default. How to Allow Ping in Windows Firewall? To configure your firewall to allow pings, follow the appropriate instructions below. Allow Ping Requests in Windows 10 Step …