ESXi 3.5 Slow Network Performance

[Jimi0110]

Hello I am hoping that someone can assist.

I have 6 Dell PowerEDGE 2950 III's all running VMWare ESXi 3.5 equipped w/dual Broadcom etXtreme II BCM5708 NIC's. All connected to a Gigabit switch.

All Windows Hosts are sufferring from horrible network performance. Oddly enough, it is only inress to the host that is sufferring the problem.

For example I can move a 500MB file from any host to a phyiscal machine on the network in about 25 seconds. Moving that same file from a physical machine to ANY of the hosts will take hours.

Cabling and phyical network issues have been ruled out. VMware tools is installed on all hosts across all ESX servers.

[krowczynski]

Check out if vmtools are installed properly on all of your vms.

What kind of ethernet adapters are you using in your vms!!

MCP, VCP

[rolohm]

You might want to look into using the utility NTttcp (http://www.microsoft.com/whdc/device/network/tcp_tool.mspx ). It will test network performance without having to move files. If you have poor disk performance using file transfer is a bad method of testing the network. If NTttcp says you're ok, then I'd check disk performance.

I assume you mean "guests" when you say "hosts"?

/rolohm

[mlubinski]

did you check port duplex/speed settings on switch side? If this would be configured differently than ESX has, then you would experience issues like you described

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