vMotion Causes Unicast Flooding

Today I visited a client who did not apply the best practice to separate vMotion traffic in it’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: Don’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...]