Comments on: Quick Fix For Broken VM Guest Network Connection Running In VMWare Server

By: Dinesh Ilindra

Dinesh Ilindra — Tue, 29 Jun 2010 14:08:14 +0000

Got the same problem while using NAT, didnt solve if I have restarted VM. But solved when I have restarted NAT service. Thank you so much.

By: Valerio

Valerio — Sun, 18 Apr 2010 16:31:09 +0000

@pieman: Your post help me very much, many thanks, hope my comment spread and revamp this post

By: sudeep

sudeep — Mon, 18 Jan 2010 05:59:22 +0000

Hi ,
Nice !!
But can anyone tell me , how to achieve the same when i am running vmware on Ubuntu host (linux)
thanks

By: Akram

Akram — Sun, 03 Jan 2010 05:25:39 +0000

Many thanks brother. This worked for me, but why cant VMware fix this already?

By: Nonner

Nonner — Thu, 24 Dec 2009 19:54:01 +0000

Thank you Thank you Thank you … though my VMWARE didn't have the same menu as described but i guess its the same problem with restarting the connection. My connection is back now … thank you thank you thank you

By: Sean Sullivan

Sean Sullivan — Fri, 30 Jan 2009 18:53:18 +0000

Thanks so much for this post. My network connection to the outside world kept dying and I couldn't figure out why for the life of me. I followed these steps and Voila!

By: John Jacob

John Jacob — Thu, 07 Aug 2008 22:04:57 +0000

OK, still having problems with loosing network connectivity on VMNET0 for all VMs as soon as I try to add a printer in Vista Business Edition. I already set the:

CheckSum Offload – None
Large Send Offload – Disabled

And have already disabled the option in manage virtual networks to Automatically choose an available physical network adapter. I also explicitly assigned the physical adapter to the Host Virtual Network Adapter Tab for VMNet0.

My NIC is HP NC105i PCIe Gigabit Server Adapter

Anybody got any ideas for me to try?

By: John Jacob

John Jacob — Thu, 07 Aug 2008 19:28:02 +0000

I've been wrestling with this problem for weeks with VMWARE Server 2 RC1. I'm using VMNET0 (Bridged) and I'm trying to get a Vista VM to map a network printer. I reboot the VMWARE Server and start the session after reboot. I can access the Internet and ping hosts, then I try to map a printer and loose connection immediately, then I can't access the network from any VM, Vista or otherwise. I have already done the step suggested above:

"disabled the option "Automatically choose an available physicall network adapter to bridge to VMNet0" from the Host – Virtual Network Settings – Automatic Bridging tab"

Will do the other suggested step today:

Disabled in the driver advanced properties tab: -
CheckSum Offload,
Large Send Offload

This is starting to drive me crazy. If anyone has some other suggestions, I would like to hear them.

By: SPB

SPB — Tue, 24 Jun 2008 19:06:00 +0000

Thanks for the article, I'm glad to finally have a working connection in my Windows VM.

By: Anonymous

Anonymous — Tue, 24 Jun 2008 14:03:26 +0000

Solved my problem, Thanks!

By: Watching The Net

Watching The Net — Thu, 12 Jun 2008 18:33:59 +0000

@pieman

Great tip, this should help other readers with the same problem.

By: pieman

pieman — Thu, 12 Jun 2008 13:50:26 +0000

Been tearing my hair out with the exact same problem for over a week now, but the problem has been with a guest using a bridged NIC.
setup as follows: -
Hardware: Dell PowerEdge R200 with 2 Broadcom NetExtreme G/Bit NIC's
Host: Windows 2003 R2 SP2 running VMWare Server 1.0.5 (was running 1.0.6)
Role: 2 x NIC RRAS server
Guest: Windows 2003 R2 SP2
Role: 1 x NIC intranet web server
The guest VM would have full network connectivity 1 day, then randomly loose connectivity with all other nodes on the LAN, restarting the guest didn't sort the problem, resarched the issue on VMWare communities and came up with a problem with the NIC's installed on the server in that the Broadcom NetExtreme NIC's must have the following options disabled in the driver advanced properties tab: -
CheckSum Offload,
Large Send Offload
This appeared to initially corrected the problem, for a couple of days atleast, VMWare Server 1.0.6 update released upgraded fine, all still working, then random lost of guest network connectivity again, downgraded back to VMWare Server v1.0.5 everything worked again, went away happy, attempted to access the server and it's lost connectivity again. came accross this post thankfully even though it was relating to NAT on the VMNet8 interface, it got me thinking… so disabled the option "Automatically choose an available physicall network adapter to bridge to VMNet0" from the Host – Virtual Network Settings – Automatic Bridging tab, and suddenly everything starts working again… Jobs-a-good-n!!!

Hope that this helps someone else out.
Pieman

By: not karl rove

not karl rove — Fri, 06 Jun 2008 23:18:34 +0000

Then again… maybe not.

This step fixed the problem yesterday but today it's broken again, and this fix doesn't seem to work this time. Maybe I will have to reboot everything (host and guest) and see where I wind up.

Any other thoughts/tips?

By: Not Karl Rove

Not Karl Rove — Thu, 05 Jun 2008 04:18:22 +0000

Yep, that sorted me out… Been wrestling with this for about a day, and had trouble even figuring out the right query to throw at Google to find something helpful.

Thanks for posting this. Now my only concern is, the VM I'm building will be used in demos by other people. I hope they don't also have an issue with this service needing a quick restart.

By: Watching The Net

Watching The Net — Mon, 26 May 2008 22:55:27 +0000

@roland

Yes this is only for NAT. To restart other VMnet hosts (VMnet0 to 9) Just use the pull down to select.