Author: Danilo

vSAN is a software-defined storage solution used a lot in modern data centers. It’s a police-driven technology that provides us the flexibility to apply different policies for each virtual machine (VM) and different policies for each virtual disk (vmdk level). This article aims to provide a basic understanding of the vSAN Durability Components. We have written some articles about vSAN. You can access those by the following link: First and Foremost, What is a vSAN Storage Policy? As we know, vSAN is an Object-Based storage. It means that all VMs stored in the vSAN datastore are formed by the following…

This article will provide an introduction to the vSAN Trace Files and some techniques to customize the maximum size and location to place those files. So, First and Foremost, What are the vSAN Trace Files? vSAN traces are log files that are used for diagnosing and troubleshooting issues with vSAN. These files can be particularly useful for debugging critical performance issues and data-path-related problems. By default, vSAN traces are saved to /var/log/vsantraces.The default maximum file size is 180MB, and there is a rotation of 8 files. This means that when the 9th file is created, the oldest file is deleted,…

VMs Are Unable to Connect in the NSX Environment is an article that shows a simple workflow to debug a VM connection issue. In this article, for instance, we are considering both VMs placed in the same NSX segment (VM A and VM B) but running on different ESXi hosts (different Host Transport Nodes). The NSX segment name is “NSX Web Segment”. In the following picture, we have a workflow that can be used to troubleshoot a communication failure between both VMs: Step 1: Are the virtual machines configured correctly? To begin with, a good starting point is to check…

NSX Distributed Firewall Challenge Scenario shows a scenario with a connectivity issue between two VMs placed on the same segment. The challenge here is to understand the issue by using troubleshooting techniques and fix the issue. Let’s talk a little about the scenario: What is the issue? From the VM “sa-infosec-03” the curl command failed. The curl command is using the reach a web page provided by the “sa-tlsvm-01” VM. Our aim here is to troubleshoot and solve the issue! Note: There are some ways to troubleshoot this issue. So, based on this, we will show a couple of ways…

Explaining how inter SR iBGP works in the NSX is an article that provides an example of how the inter SR iBGP routing process works in advertising routes between Edge Transport Nodes in a Tier-0 Gateway. I want to talk about some NSX articles that we wrote. These articles are about NSX Introduction, NSX Manager (How to Deploy an NSX Management Cluster), about micro-segmentation, about NSX ALB (Advanced Load Balancer), and so on. So, feel free to check each one by accessing the following link:NSX Archives – DPC Virtual Tips Warning: To explain how inter SR iBGP works in the…

Routing Down on Tier-0 Service Router is an article that explains what happens if a Tier-0 Service Router (SR) loses its routing adjacencies. As we know, in the NSX world we have two gateway types: Both gateways are hosted in the Edge Transport Node device!Each one is responsible for some activities in the NSX topology and has different characteristics.We wrote an article that shows some examples of NSX topologies and the meaning of each gateway type and its interfaces. You can access this article by clicking on the following link:Some Examples of NSX Topologies – DPC Virtual Tips T0 Service…