DirectPath I/O allows virtual machine access to physical PCI functions on platforms with an I/O Memory Management Unit.
The following features are unavailable for virtual machines configured with DirectPath:
- Hot adding and removing of virtual devices
- Suspend and resume
- Record and replay
- Fault tolerance
- High availability
- DRS (limited availability. The virtual machine can be part of a cluster, but cannot migrate across hosts)
- Snapshots
The following features are only available for virtual machines configured with DirectPath I/O on Cisco Unified Computing Systems (UCS) through Cisco Virtual Machine Fabric Extender (VM-FEX) distributed switches.
- vMotion
- Hot adding and removing of virtual devices
- Suspend and resume
- High availability
- DRS
- Snapshots
See Cisco VM-FEX documentation for details on supported switches and switch configuration information.
