We ran into a small but really anoying problem migrating one hyper-v cluster to another. (R2 upgrade). We got this error when we tried to migrate a machine from cluster A to cluster B
VMM encountered a critical exception and created an exception report at C:\ProgramData\VMMLogs\SCVMM.7d8a1268-e681-48d2-835b-e6bf7e7d056a\report.txt.
See the report for more details and search user forums for well-known failure root causes for self-help.
No available connection to selected VM Network can be found.
Ensure host NICs have connection to the fabric network on which VM Network is created.
The virtual machine or tier load balancer configuration requires an IP pool and there are no appropriate IP pools accessible from the host.
Select a host with access to an appropriate IP pool and try the operation again.
Our virtual machine had dynamic memory assigned to them. And the start up memory was set to 16MB.
When we changed the start up memory to 128MB the migration was successfull