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Knowledge Base

Verifying host networking speed (1009527)

Last Updated: 9/5/2017Categories: Total Views: 32113Language:
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Symptoms

Applications running in virtual machines perform poorly

It takes a long time to log into a network

It takes a long time to copy a file from a network share

Multi-user services have long transaction times or can handle less simultaneous users than expected

Purpose

This articles assists you in determining if a computer running a VMware hosted product is affected by slow networking. Slow host networking results in slow guest operating system networking.

Resolution

Evaluate these points for validity. A positive result may indicate a networking problem on the physical host that needs to be corrected to ensure optimum virtual machine performance.

If corrective action is taken on the host, test virtual machine networking performance again.

It takes longer to copy a file from a network location to this host than it does to copy the same file to a different host

Logging into a network from the host takes the same amount of time as it does when logging into the same network from the guest operating system

There are multiple virtual machines running on the host and they are all equally slow

Running an application that is slow when run from the guest operating system is just as slow when run on the host

The networking settings of host network adapters have been manually set to a speed or duplex lower than their capability

The firmware and driver versions for host network adapters are not current

There is a firewall, network shaping software, or network monitoring software on the host affecting network speed

There is software running on the host that makes extensive use of networking traffic, like a heavily used Web server or file share

Consult your vendor documentation for more information about performing these actions.

Related Information

For related troubleshooting information, see Troubleshooting virtual machine performance issues (1008360).

Detectable by VMware SkylineTM

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End Of General Availability of the Free vSphere Hypervisor (ESXi 7.x and 8.x) (2107518)

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Download and Install VMware Fusion (2014097)

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