vMotion Causes Unicast Flooding

Today I visited a client who did not apply the best practice to separate vMotion traffic in itโ€™s own isolated VLAN. Live migration from one host to another cause the physical switch to experience unicast flooding. After much investigation, the solution was quite simple: Donโ€™t setup your management and your vMotion network traffic to be on the same subnet. … [Read more...]

vMotion operation fails with the error: Insufficient disk space on datastore

vCenter Server 4.0 VMotion operation fails with the error: Insufficient disk space on datastore Symptoms A VMotion operation fails When attempting to migrate, you see the error: "Insufficient disk space on datastore ''." Resolution Cause This issue may occur during a vMotion operation because vCenter Server 4.0 requires enough space to store two full-size copies of the virtual machine swap file simultaneously. If there is not enough space in the datastore, you receive this … [Read more...]