HYPERV live migration between 2 differents intel processor failed

Question

Hello,

I have a cluster with 4 hyper V.

I have 2 servers with a GenuineIntel Intel64 Family 6 Model 85 Stepping 4 processor,

and the 2 others with GenuineIntel Intel64 Family 6 Model 85 Stepping 7 processor.

Since i migrated my hyperV servers from 2016 to 2019, the live migration between the servers with differents processors failed. (error 21502).

The compatibility box is checked.

I would like some help.

Thanks.

Answer 1

I am having exactly the same problem with two Dell Poweredge R340's. First node is having: Intel Xeon E-2288G CPU Second node is having: Inel Xeon E-2186G CPU I already re-created the virtual machine on the second (older) CPU node. I have the 'Migrate to a physical computer with a different processor version' checked!
Running Hyper-V on Server 2022 with 'configuration version 10.0' for this VM. When cold starting the VM on the older node (second node), I can live migrate to the new node and back. But when starting it on the newer node (first node) I can not move it to the older node.

Answer 2

I also have a similar issue, two older nodes with Xeon 6130 and two newer with Xeon 6230, all on DL380 gen10.

Since the end of last year, live migration is having issues for VMs started on the newer hosts, but not if started from both older ones.

CPU compatibility is checked, even a VM with no ntwork switch or any HDD connected has these symptoms.

Performing a quick migration raises an event il WIndows logs saying that VM has an hardware incompatibility with physical host.

All servers are at the same patch level (OS and hardware).

Has anyone found anything to fix this type of issue?

Answer 3

Has a fix or workaround been discovered for this yet?

Answer 4

Having similar issue with Dell R650 nodes. R630, R640 or R660 do not have this problem. VM started on a R650 only migrates to other R650 hosts and to NO other hosts.

Answer 5

I have the same situation. I have a hyper-v cluster that have 4 hosts. 2 hosts are Dell R740 with Intel(R) Xeon(R) Gold 6126 CPU @ 2.60GHz CPUs and 2 hosts are DELL R750 with Intel(R) Xeon(R) Gold 6326 CPU @ 2.90GHz CPUs.

I can live migration from R740 to R750, but I can`t make a Live Migration from R750 to R740. Processor Compatibility mode is enabled on every vm.

Can someone explain, why live migration not working ? I can only make a quick migration from R750 to R740 , but this is not what I want.., Thank you for help...