For details about the setting, see VMware knowledge base article at To have the vMotion traffic routed across IP subnets, enable the vMotion TCP/IP stack on the host. For details, see the VMware KB article at There are some requirements for long-distance vMotion as well that we need to address first. Get started now and run your first backup in under 15 mins! All of the old boundaries we used to have are no longer an issue. However, if you are using PowerCLI 6.5 or newer, the Move-VM cmdlet will support both federated and non-federated cross vCenter migrations. Your email address will not be published. Additional parameters are required when performing a non-federated cross vCenter Server vMotion. VMware » vSphere » 5 Core Requirements for Cross vCenter Migrations. Tread lightly if your environment is picky about that stuff. To ensure secure data transfer, the vMotion network must be a secure network, accessible only to trusted parties. The round-trip time between hosts can take up to 150 milliseconds. I honestly don’t get the chance to do cross vCenter migrations daily, so it’s more of a novelty for me, but the more and more we move into cloud situations this will become all the more useful. You might consider these types of migrations for things like disaster recovery, VMware Site Recovery Manager, Multisite load balancing or follow the sun scenario support. See vSphere vMotion Networking Requirements. Secure (recommended if not using vSphere 6.5 or later encrypted vSphere vMotion). Long answer FT is limited to the same cluster and vCenter. vCenter randomly generates MAC addresses so there is a slight chance you might run into a duplicate. Joseph Griffiths is a virtualization focused solutions architect who works with complex cloud based solutions. Comment document.getElementById("comment").setAttribute( "id", "a0493dacde38d7ee986cf046f11ec82b" );document.getElementById("b3e85cb6de").setAttribute( "id", "comment" ); I've been working in IT for 20+ years and have been immersed in virtualization and VMware technologies for as long as I can remember! Functional NTP is critical for this feature to work! While creating a vmotion network for cross vcenter vmotion should the vmotion network be routable on L3 network and should the VM port groups use the same name. Similar to above, different dvSwitch versions have different features, so a check is needed. So AMD to Intel chips are a no-go. See Place vMotion Traffic on the vMotion TCP/IP Stack of an ESXi Host. Breaking out a SSO/PSC to enable enhanced linked mode, You are running two vCenters one at each site, You are running virtual distributed switches at each site, When initiating the moves in the web client both source and destination vCenter instances must be in Enhanced Linked mode and in the same vCenter Single Sign-On domain (, Both vCenter Servers must be time synced for SSO to work. Start your free 30-day trial of Altaro VM Backup today and see why it's trusted by 40 000+ organizations worldwide. It’s also recommended that if you upgrade from 6.0 to 6.5, or 6.5 to 6.7, that you upgrade the other side of the environment to that same version as well. Can you help me with this query. The hosts must meet the networking requirement for vMotion. You can check out our PowerCLI video, hosted by Andy Syrewicze below. These requirements can really bite you if you are not careful. Migration with vMotion requires correctly configured network interfaces on source and target hosts. It demonstrates the functionality. This function is something we’ve all been waiting for but you do have to meet the above requirements in order to be successful with it. These limits vary with a host's link speed to the vMotion network. Now with that out of the way, this is a nice GUI front end that allows you to easily migrate machines in bulk. vMotion in an environment without shared storage is subject to the following requirements and limitations: The hosts must be licensed for vMotion. For this post, I wanted to put together a few tips on cross vCenter migrations. vSphere vMotion network: L3 connection. They have a demo video out on YouTube that I’ve embedded. Network Port Requirements. The VM port groups do not need to be the same but if you want the virtual machine to work at the destination the layer 2 will need to be the same and stretched between sites. If you’ve got some extra time, our YouTube channel is full of great videos. FT requires both side to confirm an instruction and write before going forward introducing any latency in this process would simply kill the performance of the machine. It checks to make sure you are not taking a functional network adapter and moving it to a destination network that will force the virtual machine offline. config.migrate.test.CompatibleNetworks.VMOnVirtualIntranet, Place vMotion Traffic on the vMotion TCP/IP Stack of an ESXi Host, Networking Best Practices for vSphere vMotion. Now, we also have to keep in mind that the hosts must meet the same CPU compatibility standards. Having recently been stung by these requirements I thought I would collect them into a single location. Cross vCenter migrations were introduced in vSphere 6.0 and they allow virtual machines to be moved from one vCenter Server instance to another. The above migration Fling does make life easier but it’s not required. This blog represents his random technical notes and thoughts. To override the default behavior, set the config.migrate.test.CompatibleNetworks.VMOnVirtualIntranet advanced settings of vCenter Server to false. vSphere 5.5 is not supported. This is because the source vCenter must be able to authenticate to the destination vCenter. The hosts must be running ESXi 5.1 or later. You can follow Joseph on Twitter @Gortees, Click to share on Twitter (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Facebook (Opens in new window), Long Distance Cross vCenter vMotion requirements. The only thing distinguishes Long Distance vMotion from vMotion is the latency between source and destination hosts. Perform live/cold migration as well as relocate/clone operations, Works for migration tasks within and across vCenter servers, Select host/cluster/folder/resource pool as placement target, Supports both storage vMotion and shared datastore migration, Flexible configuration for VMs with multiple network interfaces. The change takes effect immediately. vMotion between distributed switches of different versions. The cross vCenter Server and long-distance vMotion features require an Enterprise Plus license, so be sure both source and destination environments are licensed properly. For migration of compute resources only, both ESXi hosts must be connected to the shared virtual machine storage. If you have the proper license applied to your environment, you can perform reliable migrations between hosts that are separated by high network round-trip latency times. The round-trip time between hosts can take up to 150 milliseconds. vMotion across vCenter server allows you to simultaneously change the Compute, Storage, Networks and management. I have been a Virtualization Consultant and Engineer and currently as a Technical Instructor. The days of being locked into one vCenter are long gone. By default, you cannot use vMotion to migrate a virtual machine that is attached to a standard switch with no physical uplinks configured, even if the destination host also has a no-uplink standard switch with the same label. It’s a lot of asks to enable the features and something to consider if your planning on using long distance cross vCenter vMotion. MAC address must no conflict (different vCenter ID’s will ensure this), vMotion cannot take place from distributed switch to standard switch, vMotion cannot take place between distributed switches of different versions (source and destination vDS must be the same version), RTT (round-trip time) latency of 150 milliseconds or less, between hosts, You must create a routeable network for the Traffic for Cold migrations (Provisioning network from VMkernel types). vSphere 6.5 allows the network traffic with vMotion to be encrypted. It verifies this first. For a deep dive on what linked mode, is, I highly recommend you check out this other post we’ve written. This site uses Akismet to reduce spam. Notify me of follow-up comments by email. Greater bandwidth lets migrations complete more quickly. To determine the maximum number of concurrent vMotion operations possible, see Limits on Simultaneous Migrations. This is mostly a facepalm moment. The ability to move virtual machines long distances between two datacenters while running seems like the key example of the power of abstraction. Essentially best case scenario you have to have two vCenters in enhanced linked mode on the same version of ESXi, with the same hardware type or in EVC with the same version of distributed switches. Let’s outline a few tips for a successful cross vCenter … For information about configuring advanced settings of vCenter Server, see Configure Advanced Settings. Configure each host with at least one network interface for vMotion traffic. Configure the virtual networks on vMotion enabled hosts as follows: On each host, configure a VMkernel port group for vMotion. It’s not a method for making a single server application site redundant that needs to be done via application layer or attached to a RTO with DR plans. The maximum supported network round-trip time for vMotion migrations is 150 milliseconds. Gains in throughput resulting from WAN optimization techniques do not count towards the 250-Mbps limit. When you do decide to kick off across vCenter migration, vCenter Server performs network compatibility checks to prevent the following configuration problems: First and foremost, this is a VMware Fling, so it’s not officially supported. To migrate VMs between vCenter Server instances in separate vSphere Single Sign-On domains, you need to use vSphere APIs/SDK to migration. You can change compute, network, storage, and management all in one concurrent move. Your email address will not be published. The cross-vCenter provisioning operations not supported across different versions of vCenter Server include vMotion, cold migration, and cloning. During a migration with vMotion. Required fields are marked *. Same virtual machine IP address available at the destination. You know if is possible doing FT between data centers? If you’re in the process of upgrading your environment, I would highly consider upgrading your licensing scheme to allow for this feature.