vMotion Across vSwitches and vCenter Servers


In previous versions of vSphere, not allowed to perform the vMotion between the vSphere distributed Switches. It was only limited within the dvswitch. In vSphere 6.0, vMotion is allowed across vSwitches and even vCenter Servers.

vMotion Across Virtual Switches

 

vMotion is no longer restricted by the network configured with vSwitch. In vSphere 6.0, It is possible to perform vMotion across Virtual switches (Standard switch or Distributed Switch), which transfers all the VDS port metadata during the vMotion.

It is entirely transparent to the Guest VM’s and No downtime is required to perform this vMotion operation across vSwitches. Only one requirement for the vMotion across vSwitches is that you should have L2 VM Connectivity.

In vSphere 6.0, vMotion of VM is possible  in 3 different ways:

  • vMotion of VMs from Standard switch to Standard switch (VSS to VSS)
  • vMotion of VMs from Standard switch to Distributed Switch (VSS to VDS)
  • vMotion of VMs from Distributed Switch to Distributed switch (VDS to VDS)

vSphere-6.0-vMotion-Enhancements_1

vMotion Across vCenter Servers

 

In vSphere 6.0, vMotion across vCenter server allows you to simultaneously change the Compute, Storage, Networks and management, ie It leverage the vMotion with nonshared Storage.

vSphere-6.0-vMotion-Enhancements_2

 

Below are the requirement for vCenter to vCenter vMotion

  • Support for vMotion across vCenter server supports from vSphere 6.0 and later versions
  • Destination vCenter server instance should have same SSO domain as source vCenter and this operation is possible via UI. Using API, it is possible with different SSO domain.
  • 250 Mbps network bandwidth per vMotion operation

In vSphere 6.0, vMotion for Long-Distance supports upto 100+ms RTTs (which was only 10 ms in previous versions). Long-Distance vMotion allows you to vMotion your VMs from one datacenter to other datacenter of your organization. 

For the Long-Distance vMotion,

  • All the vCenters servers must connect via Layer 3 Network.
  • VM network should have L2 connectivity and same VM IP address available at destination location
  • vMotion network should have L3 connectivity and 250 MBps per vMotion Operation

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