Author: Danilo

Some useful esxcli network commands is an article that shows some useful esxcli network commands that help the administrator in day-to-day life. esxcli network commands are essential tools for VMware ESXi administrators who need to troubleshoot, configure, and monitor host networking from the command line. In this guide, we will explore some of the most useful esxcli network commands used in daily administration tasks. So, before we start, I would like to share a command reference (guide) related to the ESXi command. In this guide, we can find a lot of esxcli commands, syntax, etc: Firstly, the list of commands…

Understanding and explaining vSAN’s free capacity is essential to maintain a healthy vSAN cluster and ensure enough space for internal operations. In this article, we will explain how vSAN uses available capacity, the concept of Slack Space, and the importance of reserve capacity. vSAN requires free space for several internal activities, including data evacuation during host maintenance mode, component rebuilds, rebalancing operations, and virtual machine snapshot processes. VMware recommends maintaining a percentage of available capacity to support these operations and avoid potential issues during cluster activities. When performing operations such as changing storage policies, vSAN may temporarily require additional raw…

Debugging vCenter and ESXi heartbeat communication is an essential troubleshooting task when ESXi hosts experience intermittent disconnections, appear as Not Responding, or lose communication with vCenter Server. Because the heartbeat mechanism is one of the primary methods used by vCenter to verify host availability, analyzing this traffic can quickly determine whether the problem is caused by network connectivity, packet loss, firewall rules, routing issues, or service failures. In a healthy VMware environment, every ESXi host periodically sends heartbeat packets to the vCenter Server over UDP port 902. These heartbeat messages are transmitted every 10 seconds by the vpxa (vCenter Server…

Adding additional NSX Manager appliance is an important step when expanding an NSX-T Data Center environment. In this guide, we will demonstrate how to add a new NSX Manager node to an existing Management Cluster and configure the required parameters. VMware recommends deploying multiple NSX Manager appliances to improve resilience and redundancy in the environment. After the first NSX Manager deployment is completed, additional appliances can be added directly through the NSX Manager interface. The process involves accessing the current NSX Manager UI, starting the appliance addition wizard, and providing the required information such as hostname, IP configuration, DNS, NTP,…

NSX Manager deployment steps is the first step when building an NSX-T Data Center environment. In this guide, we will demonstrate how to deploy the first NSX Manager appliance from an OVA file and configure the required settings for initial access. The deployment process is performed through VMware vCenter Server using the OVF Template wizard. During this procedure, we will configure the virtual machine size, storage location, management network, authentication settings, and network parameters required by the NSX Manager appliance. After completing the OVA deployment and powering on the appliance, the NSX Manager services need some time to initialize. Once…

VMware NSX-T is a software-defined networking (SDN) platform designed to virtualize and automate network and security services in modern data center environments. In this article, we will explore the basic concepts of NSX-T, its architecture, and the main components that build this solution. NSX-T abstracts traditional network components such as switches, routers, firewalls, VPNs, and load balancers into software-based services. This approach allows organizations to apply consistent security and networking policies across virtualized environments while improving agility and operational efficiency. This article, Introduction to NSX-T, will provide the basics and fundamental details of NSX-T. Update: Nowadays, VMware has changed the…