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Linux teamd driver issues with LACP vPC on Cisco Nexus switches

Posted on April 17, 2019February 21, 2021 by Luis

Mid-2018 me and my friend (back then dearest colleague Andres Villalobos) ran into an issue with Linux teamd drivers and Cisco Nexus 9000 switches when using LACP vPC (virtual port…

Posted in ACI, DatacenterLeave a Comment on Linux teamd driver issues with LACP vPC on Cisco Nexus switches

Reverse DNS PTR records and web performance issues

Posted on February 15, 2021February 25, 2021 by Luis

It’s no secret that at the slightest delay in web browsing a user may experience (regardless if it’s Netflix or your Corporate Website), the Service Desk starts getting those “is…

Posted in DNS, Linux, TroubleshootingLeave a Comment on Reverse DNS PTR records and web performance issues

Leverage Windows CMD executables from Linux using WSL version 1

Posted on December 8, 2020February 27, 2021 by Luis

Quick tip for Windows users who are still trapped with WSL version 1 due to very specific reasons, you can use the same CMD executables straight from your Linux VM,…

Posted in How-to, Linux, WindowsLeave a Comment on Leverage Windows CMD executables from Linux using WSL version 1

VMware workstation nested virtualization and WSL2 disaster

Posted on November 14, 2020February 27, 2021 by Luis

Got caught into the WSL2 hype and ran into the surprise of errors such as “Virtualized Intel VT-x/EPT is not supported on this platform”? me too (…) welcome to VMware’s…

Posted in How-to, Rant, WindowsLeave a Comment on VMware workstation nested virtualization and WSL2 disaster

The dangers of a “Book Manager” in IT

Posted on April 7, 2020February 20, 2021 by Luis

Have you ever come across managers bringing up phrases such as “and now we will share a personal fact about ourselves with our colleagues…” or “I don’t ask you more…

Posted in ManagementLeave a Comment on The dangers of a “Book Manager” in IT

Changing a Nexus 9K switch from ACI to NX-OS mode without an APIC controller

Posted on March 31, 2019March 31, 2019 by Luis

Cisco ACI -just like any other beta platform- had an infancy period, which for the Nexus 9K line meant to have a series of licensing schemas, one of those being…

Posted in ACI, Datacenter, How-toLeave a Comment on Changing a Nexus 9K switch from ACI to NX-OS mode without an APIC controller

How to make Putty the default telnet application in Windows 10

Posted on February 28, 2019March 5, 2019 by Luis

Trusty yet insecure, it’s the 21st century and long gone are the days of telnet but, is there any need to keep using telnet to access your network devices nowadays?…

Posted in How-to, SecurityLeave a Comment on How to make Putty the default telnet application in Windows 10

How to upgrade Cisco’s UCS CIMC firmware

Posted on February 23, 2019November 22, 2020 by Luis

The Cisco Integrated Management Controller is the out-of-band hardware controller included with the Cisco UCS servers and if you have read my previous blog post about the CIMC you already assigned it with…

Posted in ACI, Datacenter, How-toLeave a Comment on How to upgrade Cisco’s UCS CIMC firmware

How to upgrade Cisco’s WLC AireOS software

Posted on February 23, 2019March 10, 2019 by Luis

Quick n’ easy and just to complement my last post on updating a WLC’s FUS, here’s a guide on how to upgrade Cisco’s WLC AireOS software. Do we still call…

Posted in How-to, WirelessLeave a Comment on How to upgrade Cisco’s WLC AireOS software

How and why to apply Cisco’s WLC Field Software Upgrade (FUS)

Posted on February 18, 2019March 10, 2019 by Luis

Boring weekend and my -you gotta do something old man- feeling drag me to dust off an old Cisco WLC 2504 I bought years back on eBay. As expected it…

Posted in How-to, WirelessLeave a Comment on How and why to apply Cisco’s WLC Field Software Upgrade (FUS)

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About me

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Hi! I'm Luis Corral, IT Network Engineer/Architect, Manager, design aficionado and cookie eater. Latino, mi casa es su casa. All opinions are my own.

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Recent Posts

  • Reverse DNS PTR records and web performance issues
  • Leverage Windows CMD executables from Linux using WSL version 1
  • VMware workstation nested virtualization and WSL2 disaster
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