Sunday 4 September 2022

Unsupported Transceiver in Cisco Catalyst Switch Sub-module

All SFP modules contain a number of recorded values in their EEPROM and include

  • Vendor Name
  • Vendor ID
  • Serial Number
  • Security Code
  • CRC

Force CISCO Switch to use 3rd Party SFPs
Despite the error displayed, which leaves no hope for a solution, keep smiling as you're about to be given one. There are two undocumented commands which can be used to force the Cisco Catalyst switch to enable the GBIC port and use the 3rd party SFP:

Host(config)# service unsupported-transceiver

Warning: When Cisco determines that a fault or defect can be traced to the use of third-party transceivers installed by a customer or reseller, then, at Cisco's discretion, Cisco may withhold support under warranty or a Cisco support program. In the course of providing support for a Cisco networking product, Cisco may require that the end user install Cisco transceivers if Cisco determines that removing third-party parts will assist Cisco in diagnosing the cause of a support issue.

Host(config)# no errdisable detect cause gbic-invalid


Chrome Browser: Managed by the Organization on a Personal Computer

"If you have Microsoft Windows, Apple macOS, or Linux devices that are no longer being used in your organization, you might decide to repurpose and distribute them for personal use. Or, some users might purchase a second-hand Windows or macOS device, where Chrome browser was previously managed by an administrator in a school, company, or other group. 

If devices are not properly reset, an administrator might still manage Chrome browser. Before you repurpose a device, stop managing or delete the Chrome browser." Reference


Upgrade Windows 11 Home to Windows 11 Pro

Disable internet connection (Wi-Fi, Internet, etc.) Change the product key using the following Generic product key:                     VK7J...