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hyvokar
Enthusiast
Enthusiast

Esxi 5.5 slow network performance

Hi!

I have a esxi5.5 2403361 with i7 cpu, 32gb mem, adaptec 5805 with 6x2TB in raid 10 and Intel 82546EB 2 port 1Gb network card.

The host is almost idle.


I recently purchased a NAS for backups, which I connect via iSCSI

The backup speed is quite low, ~30MB/s

I tried the following:

Create new iscsi LUN on nas and map it to Win7 VM inside esxi (let's say, it's G:-drive).

    -     try cipher /W:G: , ~30MB/s

Disconnected the LUN and mapped it to a windows desktop machine

     - try cipher /W:G: , ~110MB/s

Create a new virtual hard disk for a VM, and connect it

     - try cipher /W:G: ~440MB/s

Open datastore with winscp from windows desktop

     - copy a random OS image, ~30MB/s

So my conclusion if, that there is something slowing down the esxi-network. Is there anything more I could do to troubleshoot, or even fix the problem?

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3 Replies
hyvokar
Enthusiast
Enthusiast

Anyone?

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hyvokar
Enthusiast
Enthusiast

bump

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ujjwal2018
VMware Employee
VMware Employee

You can refer one of the KB - VMware Knowledge Base

Plus make sure you are using the latest NIC Driver -Firmware on the server -      esxcli network nic get -n <vmnix>

You can run iperf tool across the virtual machine on the same host and run iperf tool across the virtual machine on 2 different host to check for any network issues on the esxi host .

Also check the below and make sure there are no errors/drops observed on the vmnic on the host - esxcli network port stats get -n <vmnicx>

" Please consider marking this answer "correct" or "helpful" if you think your question have been answered correctly."

Regards,

UJ

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