Solved

In ESX 3.5, is there a limit of virtual machines? I am running into a problem where I have 58 vm's on a host, and when I add the 59th, the virtual NIC on the guest drops its connection.

Posted on 2008-10-09
7
1,138 Views
Last Modified: 2012-05-05
I have 58 virtual XP desktops running on a single ESX host. I have the resources to add many more, but when I attempt to add the 59th guest machine, the virtual NIC on the guest becomes disconnected. I did find where there is a 256 MAC address limit per host, so it is not that. Anyone else have a similar problem? Is there a checkbox or setting I am missing somewhere?
0
Comment
Question by:kckip
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 
LVL 4

Expert Comment

by:Patrick49er
ID: 22680208
How many physical NICs do you have on the ESX server?  Do you have your service console on a dedicated NIC like it is advised?
0
 
LVL 4

Expert Comment

by:Patrick49er
ID: 22680245
According this document, there is a 60 VM limit.  Here is the document with all the information:

http://www.vmware.com/pdf/vi3_301_201_config_max.pdf
0
 

Author Comment

by:kckip
ID: 22680352
In response to Patrick49er: I have 1 NIC configured as the service console, and 4 NIC's configured for vm data traffic. These are all 1GB connections. Thanks for the document, but the 60 limit refers to devices connected to a virtual machine, not the limit of virtual machines per host.
0
Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

 
LVL 4

Expert Comment

by:Patrick49er
ID: 22680431
Ack!  You are right.  Serves me best to read it more carefully. ;-)  There is a vCPU limit of 128, but since I doubt you are assigning 2 vCPUs per XP machine, that wouldn't put you at the limit either.

The following link has a discussion on VMware's community.  Some good discussion there that boils down to it basically depending on what physical hardware you have your ESX server running on and how much resources are installed.  It also depends on how much resource you allocate to your VMs.

http://communities.vmware.com/thread/170137
0
 
LVL 5

Accepted Solution

by:
Stappmeyer earned 200 total points
ID: 22683751
I suspect that you may need to change the number of ports on the virtual switch.  I believe that by default it is set to 58.  You will need to increase and restart the ESX host.
Steve
0
 
LVL 2

Assisted Solution

by:DChaffey
DChaffey earned 50 total points
ID: 22685707
Seconding Stappmeyer's comment, the base default number of ports on a vSwitch is most likely to be your issue here.

The hard limit on VM's in virtual centre is 2000 for VI3.5 / VC2.5, there is no 'hard limit' on the number of guests as such (that I know of) however the limit you may run into is the maximum number of vCPU's that can be assigned per host - for VDI this is 11 per core, for servers it is 8 per core.

Here is the configuration maximums document for your version (3.5) http://www.vmware.com/pdf/vi3_35/esx_3/r35/vi3_35_25_config_max.pdf

Hope this helps!
0
 

Author Closing Comment

by:kckip
ID: 31504723
Thank You!
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Will try to explain how to use the VMware feature TAGs in the VMs and create Veeam Backup Jobs using TAGs. Since this article is too long, I will create second article for the Veeam tasks.
HOW TO: Upload an ISO image to a VMware datastore for use with VMware vSphere Hypervisor 6.5 (ESXi 6.5) using the vSphere Host Client, and checking its MD5 checksum signature is correct.  It's a good idea to compare checksums, because many installat…
Teach the user how to delpoy the vCenter Server Appliance and how to configure its network settings Deploy OVF: Open VM console and configure networking:
Teach the user how to install and configure the vCenter Orchestrator virtual appliance Open vSphere Web Client: Deploy vCenter Orchestrator virtual appliance OVA file: Verify vCenter Orchestrator virtual appliance boots successfully: Connect to the …

762 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question