Can't Live Migrate from one cluster to another i SCVMM 2012 R2

Here is the error:

Error (12700)
VMM cannot complete the host operation on the hostname1.fqdn server because of the error: Virtual machine migration operation for 'vmname' failed at migration source 'hostname1.fqdn'. (Virtual machine ID 621EFC4B-E92E-4C78-9424-7D107FC384E8)

The Virtual Machine Management Service failed to authenticate a connection for a Virtual Machine migration with host 'hostname2.fqdn'. Please check the Admin events of the host 'hostname2.fqdn' in the Hyper-V-VMMS event log for more information.

The Virtual Machine Management Service failed to authenticate the connection for a Virtual Machine migration at the source host: An existing connection was forcibly closed by the remote host. (0x80072746).

Failed to send data for a Virtual Machine migration: An existing connection was forcibly closed by the remote host. (0x80072746).
Unknown error (0x8000)

Recommended Action
Resolve the host issue and then try the operation again.

In the Hyper-V-VMMS event log on the destination host (hostname2.fqdn) I can find these:

EventID 20400:

The Virtual Machine Management Service blocked a connection request for a Virtual Machine migration from client address '12.8.210.12': This operation returned because the timeout period expired. (0x800705B4).

EventID 20402:

The Virtual Machine Management Service failed to authenticate the connection for a Virtual Machine migration at the destination host: This operation returned because the timeout period expired. (0x800705B4).

EventID 22040:

Failed to receive data for a Virtual Machine migration: This operation returned because the timeout period expired. (0x800705B4).

I Googled this:
https://social.technet.microsoft.com/Forums/en-US/be99a67b-c3cb-4e92-bee1-d8d99022147f/hyperv-2012-live-migration-fails-quick-migration-works?forum=winserverClustering

By that information I checked this:
"setspn -L servername"

All of the following seems to be in place:
HOST/HOSTNAME
HOST/HOSTNAM_FQDN
Hyper-V Replica Service/HOSTNAME
Hyper-V Replica Service/HOSTNAME_FQDN
Microsoft Virtual Console Service/HOSTNAME
Microsoft Virtual Console Service/HOSTNAME_FQDN
Microsoft Virtual System Migration Service/HOSTNAME
Microsoft Virtual System Migration Service/HOSTNAME_FQDN
LVL 2
itniflAsked:
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Same forest and/or domain?

Make sure Kerberos Constrained Delegation has been set up between the nodes that require VMs to be moved about.

How To is on TechNet with a script: Configuring Kerberos Constrained Delegation for Hyper-V Management.

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MaheshArchitectCommented:
If I look your question title, this is not possible

U can add multiple clusters to SCVMM for management purpose

However VM from one cluster cannot be live migrated to another cluster because the another cluster do not have shared storage (CSV) knowledge of 1st cluster

U can live migrate VMs between nodes of same cluster
Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Mahesh: Shared Nothing Live Migration.
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MaheshArchitectCommented:
Ya that's right
I forgot, Thanks
That option is always there, it even do not require cluster
itniflAuthor Commented:
Philip Elder:
Yes the hosts are in the same forest and domain.
I see that the hosts in the cluster I am migrating from did not have constrained delegation setup. I have done this manually now, and ensured that the destination host also has this set up for the source host. But sadly, the same error persists with the same error messages and eventids.
itniflAuthor Commented:
Seems like I had to enable Kerberos authentication on the host in SCVMM or Hyper-V manager (one or either) in addition to setting up constrained delegation. The linked article didn't describe that. I guess it was self-explanatory? :) The migration isn't failing now, will have to wait to see if it goes all the way through.
Philip ElderTechnical Architect - HA/Compute/StorageCommented:
KD needs to be set up between the nodes but also for any system that would be used to remotely manage the cluster. SCVMM should have something in their setup guides for that (we only use native tools for our cluster management)?
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