Most of you may notice how come GeekSilver hasn’t updated his blog for so long. Well, half reason is I’m very very busy on projects and the half reason is I see the storm coming and runing around to look for cover.

That storm is called Microsoft.

I can’t stress enough to remind everyone who is still crazy about Vmware and insist the leadership of virtualization is Vmware that , oh yeah, Micrsoft System Center suite and Windows 8 with Hyper-v 3 is going to be bigger than Vmware vSphere 5.

Few reasons standing out.

vCenter suite vs System Center suite 2012

Microsoft has invested all what it’s got into Virtualization. System Center suite Datacenter version retail price is $3600 for per socket and no limit on vm numbers. It offers everything Vmware got (like Operation Manager vs SCOM, Configuration Manager vs SCCM, Orchestrator vs Orchestrator, Server-vApp vs Vmware thin app, DPM, forefront vs vShield ,plus with WSUS, SCCM automatic deployment and true service as Service modling components. ) 

Check out System Center 2012 , follow this link

http://www.microsoft.com/en-us/server-cloud/system-center/default.aspx

Hyper-v 3 vs vSphere 5

On virtualization platform , Hyper-V has 90% functions what vSphere 5 can do. It supports vDS, storage acceleration, live migration and better and more support for file size, memory, CPU. Windows 8 has new virtual VMFS layer which supports almost unlimite number of files.

For more details about How good Hyper-v is, follow this link

http://www.thomasmaurer.ch/2011/09/hyper-v-version-3-kills-them-all/

http://www.google.com.au/url?sa=t&rct=j&q=system+center+2012+license&source=web&cd=3&ved=0CEcQFjAC&url=http%3A%2F%2Fdownload.microsoft.com%2Fdownload%2F8%2F7%2F0%2F870B5D9B-ACF1-4192-BD0A-543AF551B7AE%2FSystem%2520Center%25202012%2520Licensing%2520FAQ.pdf&ei=dKQfT938OKSSiQfYwajjDQ&usg=AFQjCNGnNu3ZAOHZGzWT7jwnVjOTgafphQ

Public Cloud

Please do remember Vmware hasn’t really got it’s own public cloud platform yet. vCloud Director is still struggling while Office 365 is really working well with Exchange 2010, Windows Azurs with dance with SQL 2012.

Certificates

I’m not quite how many people are still learning VCAP certificates. If I were you, I probably will change direction to learn Microsoft Private Cloud Certificates and UCS DCUCI.

Check out what Microsoft Private Cloud certificate is, follow this link

http://www.microsoft.com/learning/en/us/certification/cert-private-cloud-all.aspx

I don’t see how Vmware is going to cope with new version of Microsoft Virtualization products. Plus, Vmware shot it’s own foot with vSphere 5 license. Vmware is not a software developing company. vSphere does work very well on infrastructure and Platform (maybe in the future), but all basica software are from Microsoft. Now, MS is changing the direction and focus on every details and layer. Where can Vmware go?

I can forsee following next 3 years, Vmware will have very tough battle and 50 % of market will be consumed by Microsoft. Once next version of System Center (the one after 2012) comes out, that could be terminator of Vmware.

I have VCP certificates, do I need anything else?

First of all, you need to be aware that we are talking about cloud Certificates here. It’s not virtualization certificates. Virtualization is ground brick of Cloud, but it can’t represent the concept and IT as Service. We do need something in general concept and help us to convert business mode from normal traditional EA software license to become user consumption, department consumption mode as what I called now, IT as service.

The reason for that is we need to fully understand mode and details of each department and each software usage for business so in one day, we can break down some pieces and shift them to Public cloud.

Now, back to my own topic, Certificates.

EMC

So far, I have only found one set of Cloud certificates which is EMC CIS.

The path of getting all certificates are following:

Become an IT professional who demonstrates cross-domain expertise and focus on designing cloud-based IT service solutions that drive business transformations for the enterprise and service provider organizations. This course is for those assessing, architecting, and designing IT-as-a-Service solutions as part of the transformation and optimization of virtual data centers into cloud-based IT-as-a-Service environments. Prepare for your Expert-level Cloud Architect Certification.

Exam and Practice Test Expert E20-918 (To be announced) Specialist E20-018 Associate E20-002 OR E20-001

To be honest, the cost of taking those training are huge. You are basically looking at $3000 just for video training and $5000 for Lab training with limited region. As parent company of Vmware, EMC believes it earns it’s place to issue it’s certificates as first in industry. But will  you really want to get EMC certificates?

Cisco

Cisco has been really pushing on Virtualization and working extreme well. The flag product is UCS which earns respect and become default Blade system any company would want to have. Cisco certificates are not new to I.T so here is something new from Cisco in Cloud side.

CloudVerse

This is new released by Cisco and that’s what Cisco picture itself in Cloud business. Since there is no doubt on network part, with help of Vmware, I’m very sure Cisco will become a true leader of Cloud certification.

However, there is one specific cloud certificate from Cisco yet, so UCS certificates should be the one you can get.

Interesting enough, not only you need to pass Cisco Exam, but also must own Vmware certificates. Hence, we know how strong the relation between Cisco and Vmware.

Vmware

Here we go. There is no reason I don’t mention Vmware here. But the tricky thing is even after so many effort from Vmware for Virtualization and Cloud, there is no Vmware Cloud certificate!

My guess is Vmware is still working on how to make Cloud Director really working as it should be. All other components are made but not mature yet. We should expect to see some sort of Vmware Cloud certificates in next 2 or 3 years.

Others:

Citrix:

I never be a fan of Citrix. In my mind, it’s complicated, not user friendly, consuming too much resource, overhead for administration and too expensive and too many on licenses. The only reason we are still hitting on Citrix is the XenDesktop which is great on low bandwidth. Apart from that, I don’t see any attractions.

No cloud certificates on Citrix but I believe it will kick in pretty soon.

Microsoft:

Microsoft is keeping it’s own way on Cloud definition. It seems it doesn’t like to share whatever technology it’s using. Hyper-v 3 is finally taking vDS into it but still lack of hardware vendor’s support. Windows Azure is slowly slowly moving forward with few companies doing DEV and test on it. Office 365 could be a good one but it’s charging too much and limited on customization. Leave your product into black box and you can’t manage and don’t know how it works is a scary strategy to take.

Well, as usual, drop a line to me and see what I have missed.

Reference:

http://education.emc.com/guest/certification/framework/ca/itasaservice.aspx

http://2and2is5.wordpress.com/2010/04/01/cisco-data-center-ucs-specialist-certification/

http://mylearn.vmware.com/portals/certification/

vCenter Inventory Service

Remember I always encounter issue that inventory of datastore didn’t exactly refresh. It means when you browse content of datastore, you actually see nothing. Even after you restart service of vCenter. I believe Vmware understand this is a common issue and decided to separate Inventory service so we can manually clean up.

I quote a procedure of how to clean up Inventory service database as follow. It may come handy in one day.

Procedure

1	Stop the vCenter Inventory Service. a From the Windows Start menu, select Administrative Tools > Services. b Right-click vCenter Inventory Service and select Stop.
2	Open a command prompt.
3	Delete the entire contents of the Inventory_Service_Directory/data directory. The location of the Inventory Service directory is specified during the vCenter Server installation.
4	Change directory to Inventory_Service_directory/scripts For example, if you installed vCenter Inventory Service in the default location, run this command. cd /Program Files/VMware/Infrastructure/Inventory Service/scripts
5	Run the createDB.bat command, with no arguments, to reset the vCenter Inventory Service database.
6	Run the register.bat command to update the stored configuration information of the Inventory Service. register.bat current_vCenter_Server_fully_qualified_domain_name vCenter_Server_HTTPS_port For example, if the vCenter Server fully qualified domain name is machinename.corp.com and the HTTPS port is 443, run this command. register.bat machinename.corp.com 443
7	Restart the vCenter Inventory Service. a From the Windows Start menu, select Administrative Tools > Services. b Right-click vCenter Inventory Service and select Start.

Vmware USB Arbitration Service

According to Vmware:

USB Arbitration Service

Manages connection requests and routes USB device traffic. The arbitrator is installed and enabled by default on ESXi hosts. It scans the host for USBdevices and manages device connection among virtual machines that reside on the host. It routes device traffic to the correct virtual machine instance for delivery to the guest operating system. The arbitrator monitors the USB device and prevents other virtual machines from using it until you release it from the virtual machine it is connected to.

However, it’s first time I see this service installed with vClient 5.0. As you can see from above, it normally sits on Esxi Host. so I assume it will work just like vmplayer which allows you to redirect your USB device on your vClient machine to your VM. Still need to find out whether it’s secured to do this way though.

VMware vSphere Profile-Driven Storage Service

As you all know, with in vSphere 5, we can associate a Virtual Machine Storage Profile with a VM and it’s virtual Disks. The associatable files are including .vmx,vmsd,nvram etc. You can assign disk to different speed or priority storage profile.

If you add a new virtual disk and associate it with a VM storage profile, this service will help you to do this job.

Well, that’s all what I have discovered so far for vCenter. More stuff coming soon.

so please stay with me and good stuff is coming!

Silver

However, when I checked out vSphere 5 license, I found myself experiencing betray and sad feeling.

The reason for that is very simple. vSphere 5 license lift the CPU limit but put limit on the memory instead.

As you can see, the Enterprise can only allow Enterprise user to use Maximum 32GB per core for your VM.

Let’s take an example.

If you have 5 DL380G7 hosts. Each host has 2 processors and 384GB memory.

With your current Enterprise license, the maximum RAM you can use is:

5(hosts) x 32(GB) x 2 (proc) = 320GB (10 licenses)

If you want to use all your memory you have already bought which is 1920GB, you need to buy additional  50 Enterprise license!!

so with same company and same equipment, you have 5 times cost than vSphere 4.

What makes it even worse is:

vRAM Entitlement
We have introduced vRAM, a transferable, virtualization-based
entitlement to offer customers the greatest flexibility for vSphere
configuration and usage. vRAM is defined as the virtual memory
configured to virtual machines. When a virtual machine is created,
it is configured with a certain amount of virtual memory (vRAM)
available to the virtual machine. Depending on the edition, each
vSphere 5.0-CPU license provides a certain vRAM capacity
entitlement. When the virtual machine is powered on, the vRAM
configured for that virtual machine counts against the total vRAM
entitled to the user. There are no restrictions on how vRAM capacity
can be distributed among virtual machines: a customer can
configure many small virtual machines or one large virtual machine.
The entitled vRAM is a fungible resource configured to meet
customer workload requirements.

Wow. It means no matter what kind of Vmware memory technology you applied to your vCenter, it’s calculated by virtual memory!!! Not even physical memory!!

It means if you use 4 GB on 4 VMs, in fact, only 1GB your physical memory is used by VMs, but it’s still counted as 16GB vRAM!!

WTF is Vmware thinking? guess what I feel when I read it? It’s a deal break for my career changing!! I guess I need to focus on Hyper-v and Citrix now. If their price is reasonable.

Is 13th July an excited day for Vmware? No, it’s a very very SAD day.

P.S: Too bad I just past VCAP-DCA. If I knew that, I would switch to Citrix Xen…..

What is Cisco UCS?

Yes, you can google it with this keyword. But essentially, Cisco UCS is part of vBlock components and CISCO decide to sell it separately. With VCE(Vmware, Cisco,EMC) union surfs up, it’s clear that Cisco play parts of blade servers and network role.

In this UCS system, Cisco will have a new VIC (Virtual Interface Card, it’s actually a physical card!) for your blade servers (or your rack servers!) , a fibre switch (Cisco 6100 Fabric Interconnects, which transmit both network and SAN information), a chassise and blades servers (Good bye, HP&IBM), one management software (I’m pretty sure it can manage EMC SAN as well, if you have license or models).

If you good enough to throw your EMC SAN into it, load with Vmware on the blade. Ding! You got your own vBlock!

What can Cisco UCS do for you?

It’s surprising that the first selling point from today meeting is not saving (they do mention saving after you buy at least 2 chassies, 6 blades…..), is not performance improvement (well, I will mention later). The first selling point is you will have less cables in the Datacenter!! Interesting, isn’t it? Well, let me elaborate those points one by one.

Less cables in the DC

Because you are using Blades servers, You would expect less cables since everything should go through the backbone (FC). Cisco did push out a new physical card, VIC (Virtual Interface Card, a very confusing name, isn’t it? ). You suppose to have these cards (well, load balance, should we?) in each your blade server or Rack server(Still need to confirm whether you can install on other brand servers). You should use this card for both network and SAN traffic.

VMDirectPath kicks in with VIC

This is interesting thing. VMDirectPath is a feature Vmware ESX 4  allows you to directly access a PCIe hardware on the host from your VMs. With this VIC in your ESX(need to download a special Cisco OEM version of ESXi 4), you would be able to directly mapping your vmxnet3 to your Cisco 6100 FC switch which will create a dynamic port to do 1:1 port mapping for your data traffic. So you basically ditch the vss(local traditional local vSwitch) and start to use fancy vDS. Wait a second, not only you need to buy a Enterprise Plus for all your ESX host, you actually need to purchase Cisco Nexus 1000 vDS so you will be able to let your Vmware to manage your network I/O and storage I/O since they are going through the same card. According to Cisco diagram, you will have 30% Network I/O performance increase, if you are using Vmware (bye,bye, Hyper-V and Citrix). But yes, that’s network I/O only, why? because Vmware hypervisor layer handles Storage I/O.

with vSphere 5.0 release later on, you will be able to vMotion via VMDirectPath. so it means Vmware Hyper layer would understand VIC and acting like a vm and transfer vMotion.

One Management Software

oh, yeah. UCS management software. A one stop for everything if you buy everything as what Cisco suggests. A basic version of vBlock software which, I’m pretty sure, has capability to control your EMC SAN as well. If you purchase the correct models and license. VCE claims they have a unique team to handle all call support. It’s not bug free software, but it does help you deploy VMs and locate issues.

Money, Money, money

Well. At the end of day, it’s cost which decides everything. Cisco UCS ain’t cheap. You need to buy Blade and chassies, that alone is going to cost you arm and leg. I still need to confirm whether VIC will work on other servers. But all those cost (assume you have already got your servers, SAN, FC switch) are actually for 30% Network I/O performance in VM and aggregates all your cables which most Blade servers do anyway. I haven’t compared cost between normal Blades and Cisco UCS. But that’s pretty much what it is.

Conclusion:

Well, if it is time for you to upgrade your ESX hosts, if you have plans to buy Blade and Chassies, Cisco UCS can be an option for you. Well, yeah, almost forget these 30% network I/O and extra Vmware Enterprise Plus license and Cisco Nexus 1000…..

Score: 350

Well, it’s not great but like what other people say, pass is a pass.

I would like to give my special appreciation with all documents I found on the Internet to help me study.

I wish you all well and keep working hard and enjoy your Vmware Ride.

Reference:

http://www.vexperienced.co.uk/

http://www.kendrickcoleman.com/index.php?/Tech-Blog/vcap-datacenter-administration-exam-landing-page-vdca410.html

http://photomission.co.uk/

Don’t know whether you are aware the disaster  happened to Distribute I.T .Pty Ltd. This poor site hosting company got hacked 6 days ago and completed lost 4,800 domain sites data including backup and snapshots!!

Let’s check out few posts from their website.

MONDAY, 13 JUNE 2011

Notice – Service Disruptions

Dear Valued Client,
As most of you are aware, Distribute IT’s systems are currently offline due to a deliberate, premeditated and targeted attack on our Network.
The extent of the attack is quite broad and recovery efforts have been underway since the Network was locked down Saturday evening (11/6/11). This attack was a deliberate aim at the Company and our clients and as a valued client you should know the facts.

 

The following shared servers remain down:

• Hurricane
• Drought
• Blizzard
• Cyclone

Data Recovery process are still proceeding on these servers. Unfortunately we are unable to offer an ETA at this point. We hope to be able to advise an ETA as the day proceeds.

TUESDAY, 21 JUNE 2011

Update, Shared Hosting Clients – 21st June 2011

Our Data Recovery teams have been working around the clock in an attempt to recover data from the affected servers shared Servers. At this time, We regret to inform that the data, sites and emails that were hosted on Drought, Hurricane, Blizzard and Cyclone can be considered by all the experts to be unrecoverable. While every effort will be made to continue to gain access to the lost information from those hosting servers, it seems unlikely that any usable data will can be salvaged from these platforms. In assessing the situation, our greatest fears have been confirmed that not only was the production data erased during the attack, but also key backups, snapshots and other information that would allow us to reconstruct these Servers from the remaining data.
We have been advised by the team and the storage & capacity managers that we no longer have sufficient resources within the platform to transfer the 4,800 domains and accounts to other parts of the platform, and at this point we cannot undertake further provisioning of servers & accounts on the current infrastructure. This leaves us little choice but to assist you in any way possible to transfer your hosting and email needs to other hosting providers. We would like to thank those loyal customers who have stuck by us during this difficult time and elected to have their hosting remain on our servers. Your thoughts, consideration and kindness will not be easily forgotten. Much soul-searching and thought has gone into taking this course of action, but at this time we cannot see any alternatives for the affected servers.
When setting up Hosting with another Provider please email the new Nameserver settings which will be obtained from them to distributeit888@gmail.com and we’ll make the changes as soon as possible.
The team will continue to try to recover the information from the affected servers; however at this time we have been advised by the recovery teams that the chances for recovery beyond the data and files so far retrieved are slim. The overall magnitude of the tragedy and the loss of our information and yours is simply incalculable; and we are distressed by the actions of the parties responsible for this reprehensible act.

so Personally, I think it is possible that one of ex-employees did this job and destroy the data on the hard disk in the san and also trashed DR site and delete snapshots. If that hacker can easily destroy data so completely, I don’t think he would leave any traces to lead to that person. One can easily remote to one PC in China and one PC in States and link back to Australia. No way this can be traced.

While we clearly know there is no chance to find the criminal, but I wonder how come a host company would run without backup tapes. There are no way the hacker could damage tapes. 

I don’t know exactly the infrastructure of that company, but I would boldly guess they don’t have backup tapes which sit in the offsite while they are busy on duplicating data between production site and DR site.

This case strongly proves Cloud is perfect and DR site is not fully backup solution. Backup tapes are critical for restoring data. 

P.S: Geee, I also wonder why the admin of DIT name his servers like

…. … so please don’t do that to your servers either……

Reference:

http://www.distributeit.com.au/

As we all know, there are currently few solutions a company can chooses:

1. Vmware View
2. Citrix & Xendesktop
3. Microsoft VDI solution
4. Microsoft full desktop Terminal Server solution

I know lots of you have jump into Vmware View because it’s infrastructure and new tech which are quite attractive for geeks like us. However, for business, it’s always balancing between cost and what I.T can offer.

For me, Vmware or Citrix solutions have few obstacles.

Cost, Cost and Cost

No matter which VDI (View or Xen) you connect to, you need to pay VDA license. If you try to connect VDI via non-windows client, you are required to pay $100 VDA license. If you use Windows OS on your client, you still need to pay $50 for SA.

so your rough cost will be:

VDA license + Thin client (hardware+ OS license)+ VDI (View license or Xen license) = around $400 to $500 for each virtual desktop

Yes, it’s a lot of money.

Offline Mode is no good

Part of VDI solutions is to provide offline mode. When users are out of network zone, you will still be able to work. Both Citrix and View provide offline mode. Does this really work?

The answer is no, it’s not worthy to do it.

A initial offline mode image will be 5GB. The differential data your offline mode need to sync to View server will be 1.5GB around. What happen if you have more than 10 users in the office coming back on Monday and need to upload data?

If this is not bad enough, the offline mode doesn’t support WAN accelerator like River bed. The traffic between each offline mode machine to View server is encrypted and compressed but those data can’t be used by WAN accelerator. Without WAN accelerator, it’s hard imagining you will be using much offline mode unless you have directly line linking you to datacenter.

What’s the solution?

Just learned recently that Microsoft will release Windows Thin PC in July.

What is Windows Thin PC?

Windows Thin PC (WinTPC) is a smaller footprint version of Windows 7 that allows customers to repurpose existing PCs as thin clients without requiring the VDA license to access VDI desktops. WinTPC replaces WinFLP.  In addition, WinTPC offers:

· Keyboard Filter

· Input Method Editor support

· Key Management Server & Multiple Activation Key activation

· Rich VDI experience through support for RemoteFX

· Improved end point security by denying certain disk writes via filters

· Enterprise-grade management support through System Center

In plain English, Win Thin PC is Enterprise version of Windows Embedded std sp1. Most important is Windows Thin PC will be free for SA users!!

So what does mean?

Instead of building VDI and spend tons of money, you can:

Build Terminal server with full desktop experience.

Deploy Windows Thin PC to your old PC.

Your cost will be:

Terminal Server CAL = around $50.

Yes, that’s it. Because you use old PC which you have already paid, Win thin PC is free so all what you need to pay is a terminal server CAL. Yes, tons of money will be saved!

I also believe you can install vClient on Win Thin PC and wave cost of VDA!! But you need to double confirm from Microsoft.

What’s more about Windows Thin PC?

According to Win Thin PC  FAQ v2.0

you can run applications that fall into one of the following
categories:
• Security
• Management
• Terminal emulation
• Remote Desktop and similar technologies
• Web browser
• Media player
• Instant messaging client
• Document viewers
• .NET Framework and Java Virtual Machine
However, you cannot run any productivity applications, such as
Microsoft Office or similar applications

However, I ran ThinPC in Vmware for test. I was able to install vSphere Client, Office 2007 and windows update everything else I can think about it.

I will do more tests in the future.

But it does raise a question. Does that mean Microsoft let SA users to wave out VDA license fee? If that does, each of your View client will be saved for $100.

Reference:

http://communities.quest.com/community/vworkspace/blog/2011/06/01/quest-vs-citrix-vs-vmware-view-cost-analysis

https://connect.microsoft.com/site1223

I follow this help document to setup certificate for vCenter and ESX. I do encounter quite bit tricks which I took hours working on resolving issues. I would like to share it with everyone so you can save your time.

First of all, download and install correct version of Openssl and VC++.

You can find those applications at here.

I did my test in Windows 2008 R2 SP1 server. I ran into issue with 64bit of Openssl with 32bit, I have no issue. So Please make sure you install the right version.

• You need to install Microsoft Visual C++ 2008 Redistributable Package (x86) before installing OpenSSL.
  To download this package, see http://www.microsoft.com/downloads/en/confirmation.aspx?familyId=9b2da534-3e03-4391-8a4d-074b9f2bc1bf&displayLang=en.
• You must also download and install Win32 OpenSSL v0.9.8r.
  To download this package, see http://www.slproweb.com/products/Win32OpenSSL.html.

All what you need to do is to go to command window and run command as vmware suggest.

This is the first problem I encounter. I was looking for openssl.cnf all over the place.

Actually, this is windows version. so there is no cnf. It’s openssl.cfg in the bin folder.

so what you need to do is to use this command.

All right. Finally,  we got request file rui.csr. It’s time to use your AD CA to generate cer file. All what you need to do is to login in your CA with valid credential (you may want to login in with Enterprise Admin instead of domain admin depends on how you setup domain).

Launch IE and type http://localhost/certsrv

Click Request Certificate

Click Advanced Certificate request

Click Submit a certificate request by using a base 64 encoded….

then, you rui.crt which you generated before with notepad and paste all content

Make sure it’s for web server, then, submit.

Once you submit, you need to click Base 64 encoded and click download certificate

Save the file and rename it as rui.crt

and copy it to c:\openssl\bin folder

run this command to generate certificate.

Once it’s done, you should have 4 files.

rui.crt

rui.csr

rui.key

rui.pfx

Upload files to ESX(i) server

This is a tricky thing to do. The best way I found to do this job is:

Use winscp to upload to vMA (/home/vi-admin)

connect vMA to host

Use vifp command to replace host server ssl_cert and ssl_key

Check your certificate file before you start

This is very important step. For some reason, when you use vifp to upload file, it actually modify file a little bit. It happens on ESXi 4.1U1.

so you need to go to /etc/vmware/ssl and open rui.crt file.

If you see following file like this.

That is wrong. There should be any “^M” in the crt. so you need to manually remove those characters.

Otherwise, you may see this error if you tail vpxa.log (/var/log/vmware/vpx)

You can run following command to get rid of ^M.

tr -d ‘\r’ < /etc/vmware/ssl/rui.crt > /etc/vmware/ssl/rui-fixed.crt

mv /etc/vmware/ssl/rui-fixed.crt /etc/vmware/ssl/rui.crt

Restart vpxa agent.

for ESX(i), you need to go to DCUI and restart agent

for ESX, you need to run service vmware-vpxa restart

vCenter configuration:

You need to add root certificate on vCenter and vClient.

You need to remove host and re-add host back to vCenter

You shouldn’t encounter any certificate question.

For vCenter:

After you generate rui.crt, just copy all files to

C:\ProgramData\VMware\VMware VirtualCenter\SSL

Reference:

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1023688