Author: Danilo
Danilo
Infrastructure Engineer with experience in Virtualization, Linux, Windows Server and learning automation using Python. DPC Virtual Tips was created to share practical tutorials, lab experiences and troubleshooting guides focused on enterprise infrastructure technologies.
Setting Up a DHCP Relay on VyOS shows how to configure a DHCP Relay on the VyOS router. We have written some articles about VyOS, and we’d like to share them if you: How to Install VyOS Router in a Lab Environment:https://dpcvirtualtips.com/how-to-install-vyos-router-in-a-lab-environment/ Performing Basic Configurations on the VyOS:https://dpcvirtualtips.com/performing-basic-configurations-on-the-vyos/ First and foremost: What is DHCP Relay? A DHCP Relay is a network service that forwards DHCP requests from clients on one network to a DHCP server on another network (different broadcast domains). Since DHCP uses broadcast messages that don’t cross routers, a DHCP relay listens for these broadcasts and relays them…
Changing DNS Settings on ESXi Hosts is an article that shows an automated approach to changing the DNS configurations on all connected ESXi hosts under the same vCenter Server, using a Python script. The idea is to use a Linux CentOS 9 as a script server. We’ll execute a Python script from this server to connect to each ESXi host and upgrade the VMware Tools. 1- Install CentOS 9 (without GUI) – We have tested it with CentOS 9, but feel free to install a different Linux flavor and adjust the script to run on it. 2- Access it by SSH with root…
Changing NTP Settings on ESXi Hosts is an article that shows an automated approach to changing the NTP client configurations on all connected ESXi hosts under the same vCenter Server, using a Python script. The idea is to use a Linux CentOS 9 as a script server. We’ll execute a Python script from this server to connect to each ESXi host and upgrade the VMware Tools. So, let’s get started: 1- Install CentOS 9 (without GUI) – We have tested it with CentOS 9, but feel free to install a different Linux flavor and adjust the script to run on it. 2-…
Upgrading VMware Tools on ESXi hosts is an article that shows an automated approach to upgrading the VMware Tools version on an ESXi host, using a Python script. The idea is to use a Linux CentOS 9 as a script server. We’ll execute a Python script from this server to connect to each ESXi host and upgrade the VMware Tools. Upgrade VMware Tools on Standalone or Manually Specified Hosts If you want to upgrade the VMware Tools version on Standalone hosts or want to specify the hosts to be upgraded manually, let’s get started: 1- Install CentOS 9 (without GUI)…
vCenter Reduced Downtime Upgrade shows how to perform a vCenter Server upgrade with reduced downtime. First and foremost, what is the Reduced Downtime Upgrade? Reduced downtime upgrade (RDU) is a migration-based approach to upgrade vCenter Server between major and minor versions that reduces downtime to less than 5 minutes under ideal network, CPU, memory, and storage conditions. The reduced downtime upgrade process uses a migration-based approach. This approach deploys a new vCenter Server Appliance, and the current vCenter data and configuration are copied. The reduced downtime upgrade does not replace the current vCenter Server upgrade process through the GUI installer. During the reduced…
How can I use NAT on NSX-T? In this article, we’ll show you an example of how to use NAT on NSX-T. First and foremost, what is NAT? NAT is an acronym for Network Address Translation and acts as a translator of IP addresses – an example of NAT usage in providing Internet access to internal devices. In this scenario, we have an internal network using non-routable IP addresses on the Internet. We have a router on the network’s edge with one or more public IP addresses. So, when someone needs to access the Internet internally, the router applies NAT,…