Windows 10 USB-to-Serial adapter Woes…

Cisco, Microsoft, Windows
About 2 months ago, I had to go to a new customer site that was down and diagnose a problem.  Easy, I've done this a thousand times over the past 15 years...  Device not recognized. My USB-to-Serial adapter (no name brand off of Amazon) wasn't working.  Code 10 Error. I'm documenting this because, as infrequently as I actually use a console cable anymore, I tend to forget how to fix the issue when it arises.  2018 has been a funny year for Microsoft patching.  Seems to be a crap shoot of what will break once you apply new patches.  Windows 10 patches haven't been immune to this. Here's how I fixed it. Download the PL2303_64bit_Installer.exe Unplug the USB-to-Serial Adapter Open up the previously downloaded exe. When prompted, plug in the…
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Server 2016 VM losing network connectivity on VMWare ESXi 6.5

Microsoft, VMWare, Windows
I ran into an issue recently where servers that have been running for 6+ months with normal patching/rebooting, but without issue, all of a sudden started losing network connectivity.  The icon would pop up in the tray and the server was no longer reachable.  I still don't know the underlying cause of the issue, but here's what I figured out. Thanks to this blog post, I was able to throw some commands at the box (network tuning stuff) and determine which specific command fixed the network access. Here are the commands: netsh int tcp set global chimney=Disabled netsh int tcp set global autotuninglevel=normal netsh int tcp set supplemental custom congestionprovider=none netsh int tcp set global ecncapability=Disabled netsh int ip set global taskoffload=disabled netsh int tcp set global timestamps=Disabled netsh int…
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Quickly Change Network Interface IP’s

Microsoft, Windows
I change my network card IP's all the time to connect directly to hardware for initial configuration. I've been manually doing this for 15 years now. I finally sat down and learned netsh, put it into stupidly simple batch files and now have a folder on my desktop with all the common IP ranges. Here's an exerpt of the script to change the interface from it's current state to 192.168.10.22. @echo off netsh interface ip set address "Ethernet" static 192.168.10.22 255.255.255.0 192.168.10.1 1 goto end :end end of script To set the interface back to DHCP use this one. @echo off netsh interface ip set address "Ethernet" dhcp netsh interface ip set dns "Ethernet" dhcp goto end :end end of script Note "Ethernet" in this case is the name of…
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Troubleshooting Network Performance Issues

Cisco, Microsoft, Uncategorized, Windows
This won't be a tutorial, however, the purpose of this post is to highlight some common TCP/IP issues that degrade network performance. Network Congestion - If your firewall/router graphs your network usage, use that or obtain your current throughput (up/down) to your ISP. Use the current usage and then run a few speed tests in order to determine if your hardware is capable of hitting your maximum download/upload speeds you currently pay for. So if you have a 100 meg fiber circuit and your firewall is showing you are currently using about 60 megs at any given time, you should be able to get somewhere close to 40 megs on a download test from speedtest.net. If not, either your provider is not giving you the bandwidth you are paying for…
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XenCenter Issue after upgrading to Windows 10

Windows, XenServer
After upgrading to Windows 10 on my main work computer, I could no longer connect to 2 XenServer 6.2 hosts and found out that the error was "Could not create SSL/TLS Secure Channel".  After a bit of lazy searching I found a forum post that fixed the problem. Forum Post The actual fix for this is as follows. service xapissl stop mv /etc/xensource/xapi-ssl.pem /etc/xensource/xapi-ssl.pem.bak /opt/xensource/libexec/generate_ssl_cert "/etc/xensource/xapi-ssl.pem" '10.10.6.27' service xapissl start xe-toolstack-restart Replace the 10.10.6.27 with the IP of the server host you are attempting to fix. This should resolve your ability to connect from XenCenter.
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