Vswitch vs Distributed Switch

I can see that Distributed Switch is configured in Vcenter level to  mange multiple ESX hosts and configuration and put the  information in Vcenter database. How about if vcenter goes down, how would it going to work?
mokkanAsked:
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Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization ConsultantCommented:
vCenter Server is only used to Configure Distributed Switches.

you should read this

http://www.yellow-bricks.com/2012/02/08/distributed-vswitches-and-vcenter-outage-whats-the-deal/
mokkanAuthor Commented:
I understand that part, my question where does it keep the information?
mokkanAuthor Commented:
let me read the article  :)  thank  you
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Senior IT System EngineerSenior Systems EngineerCommented:
The vDS or Distributed Switches information is kept in the VCenter database.

When I rebuild my HP Blade Server, I'm installing it with my manufacturer ESXi image and then join it to the VCenter.

After joining to the VCenter, you can see that it will automatically populating the Distributed Switche info.
Paul SolovyovskySenior IT AdvisorCommented:
Let's say vCenter is no longer available and you have no way to restore it.  The method we used is similar to the following, essentially backup vDS prior to anything going south, rebuild new vCenter and restore vDS to new vCenter using powerCLI makes it easy

http://vlenzker.net/2016/01/migration-of-a-distributed-switch-to-a-new-vcenter-powercli-edition/
mokkanAuthor Commented:
Thank  you,  if  I understand correctly,  if  we have distributed switch and if  vcenter goes down,   VMs will be down which we created directly via Vcenter.
Senior IT System EngineerSenior Systems EngineerCommented:
@Mokkan, no it will not be.

VCenter only save and use for creating the dvSwitch.
Once it is working it will be running in each of the ESXi hosts.

I've rebooted Windows VCenter VM couple of times with no issues to production VMs.
Paul SolovyovskySenior IT AdvisorCommented:
If vCenter goes down VMs will continue to function but you will not be able to make changes to the port groups while vCenter is not available.
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization ConsultantCommented:
Thank  you,  if  I understand correctly,  if  we have distributed switch and if  vcenter goes down,   VMs will be down which we created directly via Vcenter.

No. vCenter Server is only used to Configure Distributed Switches, did you not read or understand the article ?

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