All about NSX-T

I got very very awesome way to learn NSX-T so I just wanted to share with you guys. I erased all the content of my previous postbecause duplicating the text is not smart way and specially if it is already written in better way and by VMware. Just browse below link, login with your VMware account credentials (if you have already sign-up otherwise you need to sign-up first) and start exploring NSX-T...

NSX | Deny vs Reject

In NSX, while configuring firewall rules in Edge or in DFW, you might have noticed that there are three option while choosing any action for any incoming or outgoing packet. In DFW - it is Allow, Block and Reject In ESG - it is Accept, Deny and Reject Reject action sends following responses- RST...

NSX | What happens when.....

Since last few days, I was getting lots of questions like what happens when host down, control VM down or a controller down etc. Then I thought to list down all the cases but fortunately I found below VMware article which explain well about it. I hope you too will like it. Thank you, Team vCloudNote...

vCenter | Change Power Management Policy on all ESXi hosts

Hi Guys, To know in detail about Host Power Management Policy, click here. In short, in production environment, it should be "High Performance" otherwise many issue may arise like latency while backing up a VM or VM was not responding between interval of time etc. So, if it is "Balanced" then it could be one of the reason. Right now, login your vCenter and check the power management policy...

ESXi | Error while backing up Configuration of ESXi host

This time I got a problem with ESXi host where team was getting and "Internal Server Error" while taking the backup of configuration of ESXi host. I checked and found that on that host folder "Downloads" was not there in Scratch partition. I simply SSH the host and created the folder with command "mkdir downloads" in scratch partition and taken the backup with below Powershell command successfully. #Start...

NSX | All about control plane

When I was learning about NSX Control plane, I couldn't find all information in a single pane or page. Information was there but scattered. I thought to gather all the info and put it in below way. I found it better to learn in future. Please don't shy to leave your feedback if you find it...

NSX | IP Discovery

Of course, NSX need to know the IP address of any VM and to find the IP address of any VM it uses below methods - VMware Tool installed on every VM - DHCP Snooping (Enabled on host cluster) - ARP Snooping (Enabled on host cluster) Multiple methods can be used to discover the IP and can be used in below operations\task by NSX Manger - Firewall Rules - Spoofguard IP Discovery with VMware Tools- VMware...
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PS | Automation can be dangerous!

Hi Folks, Everyone loves automation. It is very exciting to see that operations is happening automatically. But it will not take much to convert from excitement to graveyard regret if not executed in correctly or in a perfect manner. I would like to share one example where we were in process of upgrading all NSX edges. As per plan, we selected around 100 edges to upgrade first and then we had to...
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NSX | Plan upgrade with care

Good Morning Folks, Purpose of this post is to make all of you aware about one of the supported feature of NSX which is no more supported started from version 6.4.4. Why specifically I am sharing it because it can be a good example on "How you should plan the upgrade". Feature is "Starting from 6.4.4, 3DES as an encryption algorithm in NSX Edge IPsec VPN service is no longer supported." Now question...

NSX | What is 3 and 5 tuple value?

This question was asked in one of my interview and I was not that knowledgeable to answer it at that time. I don't want anyone else (who learn NSX and my blog. I have no way to share it with all the world:)) to be unanswered on this question. With this thought, I am writing the answer below. It is very small thing but matter a lot while asked in an interview.   It refers to a set of three...
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PS | How to read content of any file inside GuestOS without logging in?

I am doing lot around powershell these day. Let's see one more Challenge given and provided solution. Basically, this challenge belongs to my last blog. Here I was asked to read the content of a file in a VM without accessing RDP. Sound interesting? isn't it? #Start here Connect-VIServer vCenter1 $VM...
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Powershell | Transfer file into VM

Hi Guys,I hope that this post will help many because everyone once in their career might encounter this issue.The issue is, "RDP for this VM is not working\allowed, how can I transfer this file into this VM". I have seen many guys facing this issue, So, below is the solution#start hereclear$VC = Read-Host "Enter the IP address\fqdn of vCenter server"Connect-VIServer $VCWrite-Host "Enter the requested...
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Powershell | Modify password for user account inside GuestOS of a VM

Today I got this challenge and I did it in below way- #Start here $VC = Read-host "Enter your vCenter server name\IP " Connect-VIServer $VC $vmName = Read-host "Enter the target VM Name in vCenter " $UN = read-host "Enter the target username " $pswd = 'Password' #Enter password here which you want to set in '' mark $Chpass = @" `$securePswd = ConvertTo-SecureString -AsPlainText -String $pswd...

NSX | Bit about Firewall

Types of Firewall rules based on protocols and security layer- General Rules - These rules are applied to the L3, L4 and L7 protocols and fields such as IP addresses, TCP\UDP port numbers and APP-IDs. In addition, vCenter attributes like datacenters and resource pools can be part of the group. Ethernet...
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[Update] Powershell

Hi Guys, I am still working on the idea to create a Centralize tool for many vCenter Operational tasks with the help of powershell in a time efficient way. I have divided it into three category. Get or Search Engine ....................In Progress Set or operations Engine ...............To be initiated Deploy...

NSX | Service Composer

Below is the excellent article on Service composer in NSX. Very well explained and to the point detail. Read it completely and feel free to start any discussion. https://blogs.vmware.com/consulting/tag/nsx-service-composer Thank you, Team vCloudNot...

vROPS | Custom Groups

It helps to group scattered VMs across multiple datacenters but belongs to same entity. To elaborate, Goal - I want to have a heatmap dashboard for all VMs of my client and in a single pane. Challenge - My client's VMs are scattered around 4 data centers and in multiple folders and it is on vCloud Director platform. But vROPS will not be able to show the data in single pane of view because VMs...

Python | Web page automation with Selenium

Below example is to auto-login in web-page. Already there are lots of websites sharing the same but I would like to have all the info at one place(Because this is my vCloud Notes) :) #Start here from selenium import webdriver  #Install the selenium package from selenium.webdriver.common.by import By import time import selenium, os, time from selenium import webdriver from selenium.webdriver.common.by...

NSX | MicroSegmentation

Micro-segmentation is a fancy term, basically it is kind of next level security provided by NSX. It is well known as "Micro" because it helps us to control the traffic flow even from a vNIC. This Micro-segmentation basically we achieve by DFW that is Distributed Firewall. Internet is already flooded...

vROPS | Health Check of cluster

Sometime we have to check the cluster health. In terms of database size, collected metrics size etc.. for that I have a script which gives you very beautiful view of each and every thing of all the vrops cluster nodes. Run the script and you see it by yourself. Step 1: Login vrops master node with...
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