Category: Network Virtualization

GNS3 VM startup error with Intel VT-x/EPT or AMD-V/RVI enabled – Resolved

by Samuel Mitchell, posted in Data Center Virtualization, Hyper-V, Network Virtualization, Security, Uncategorized, VMware

I have spent many days setting up my GNS3 LAB on my high spec laptop, only to be disappointed at the end of all that effort suddenly with a startup error “Feature ‘hv.capable’ was 0, but must be at least 0x1. Module ‘FeatureCompatLate’ power on failed. Failed to sart the virtual machine”

I have the GNS3 VM version 2.2.59 running on VMware Workstation version 25H2u1 which was working during the setup.

The GNS3 VM uses nested virtualization which requests the vCPU processor feature Virtualize Intel VT-x/EPT or AMD-V/RVI enabled for KVM to function in GNS3.

I started to investigate and research the error and it was identified that in Windows 11, the Core Isolation (Memory Integrity) feature in Windows Security –> Device Security was the cause of the error.

Resolution

In Windows Security -> Device security -> Core Isolation -> Disable Memory Integrity

Research

I did some digging to find out the root cause of the memory integrity causing error in the VMware workstation. I found out that the memory integrity is using hardware-based virtualization security which forces the CPU to grant exclusive access to the virtualization technology features to Windows restricting this features to other virtualization platform.

reference:

Virtualization applications don’t work together with Hyper-V and Hyper-V-based features

Core isolation

Multi-Cloud Architect Study Guide and Resources

Featured by Samuel Mitchell, posted in AWS, Azure, Data Center Virtualization, Microsoft, Network Virtualization, Uncategorized

Introduction

I have created this article to reflect the title which is to provide study resources to prepare for the various Cloud Architect certifications for Oracle, Google Cloud, Amazon Web Services and Microsoft Azure. Each of them brings their own dynamics to the architecture space and has difference focus and value. When you combine the information together, it will make you a well rounded Architect. The only missing piece is the business side because these resources only bring the technology perspective and focus. To fill this gap, I have included other resources from my references who I believe are enlightening the technical community on how to approach Architects with soft skills which is more important than the technical skills (the know how). Resources are from difference sources:

Technical Skills for Cloud Architects from different Cloud Service Providers:

Oracle Cloud Infrastructure 2023 Architect Associate

Oracle Cloud Infrastructure 2023 Architect Professional

Google Cloud Professional Cloud Architect

AWS Solutions Architect Professional

Azure Solutions Architect Expert

Setting up a Cisco AP using the command line

by Samuel Mitchell, posted in Cisco, Network Virtualization, Uncategorized, Wireless

This article is to document the CLI commands used to configure an Autonomous Cisco Access Point.

To configure the AP management IP address use the following command:

Interface BVI1

ip address [ip] [subnetmask]

no shutdown

Next, define the SSID properties including Name, Key method and password.

This particular configuration is using WPA2 to authenticate the users.

dot11 ssid [SSIDName]

authentication open
authentication key-management wpa version 2
guest-mode
wpa-psk ascii [password]

Next you will push this SSID on the 2.4 Ghz which is on interface dot1Radio 0 and if you want it to be available on 5 Ghz band as well, you will configure it on dot1Radio 1. The radio will be using the AES-CCM encryption mode.

interface dot1radio0

encryption mode ciphers aes-ccm

ssid [SSID-name]

no shutdown

Once you are done, you can save the configuration and test you wireless device.