6.5.1

Table Of Contents
Managing Network Resources 10
vSphere provides several different methods to help you manage your network resources.
This chapter includes the following topics:
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DirectPath I/O
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Single Root I/O Virtualization (SR-IOV)
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Remote Direct Memory Access for Virtual Machines
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Jumbo Frames
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TCP Segmentation Offload
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Large Receive Offload
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NetQueue and Networking Performance
DirectPath I/O
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:
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Hot adding and removing of virtual devices
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Suspend and resume
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Record and replay
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Fault tolerance
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High availability
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DRS (limited availability. The virtual machine can be part of a cluster, but cannot migrate across
hosts)
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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.
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vMotion
VMware, Inc.
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