VMWare tools really necessary?

Similar Questions

• 5.1 - VMware Tools of Patch ESXi510-201212402-BG has not detected if necessary

  We recently upgraded to vSphere 5.1 and update the VMware Tools with the package included, build a 782409 on all of our Windows customers.  We have been harassed by her vomit of Event Viewer ' error in the RPC receive loop: RpcIn: cannot send ' as laid down in the Patch ESXi510-201212402-BG.  I used Update Manager to push ESXi510-201212402-BG to all our guests.  Running ' esxcli software vib list ' on the hosts indicates that the generation VIB light-tools has been updated.  However, all VMs in vCenter appear as 'Running (current)' and when you log in the operating system, the VMware Tools icon in the system tray does not indicate that an upgrade is waiting as previously on 4.1 where he showed the little yellow exclamation point.  If I run the installation/upgrade VMware Tools, the new version, build the 913578, is installed.  Why isn't the new detected VMware tools and view the virtual machines running the older generation as being obsolete?  What triggers it?

  As a side note, I was disappointed as everything I read about VMware Tools 5.1 declares "nondisruptive upgrade VMware Tools - after you "

  upgrade to the VMware Tools available with version 5.1, no. that it recharges will be necessary for the subsequent updates VMware Tools. " This is not true of all that construction installation 913578 on top of the 782409 require a reboot.

  Use the Update Manager to confirm that you have a base line called "VMware Tools update to Match Host (Predefined). Attach this baseline to your virtual machines and a scanner. This will determine if your VM Tools are up to date.

  Yes I agree, VMware have misled us on their VM without tools do not reboot!

• How the news works of linux vmware-tools associated with the support of actions HGFS?

  Just to clarify, if it is possible to get from VMware Tools for Linux Guest users qualified/developer/maintainer.

  If memory serves me right, from 12 Workstation, VMware Tools for modified Linux related with the way it handles stocks HGFS.

  Installation of VMware tools on many Linux guests, I always see the same behavior.

  In some installations it build hgfs module, in others it seems fair to connect on vmhgfs-fuse executable. No module hgfs not charged in this case of the kernel then HGFS works as expected.

  Exactly how it works under the hood, how to install VMware Tools/config, can determine whether it is necessary to build the module or just run vmhgfs-fuse?

  Well, strange person, not even VMware guys come on this subject. IMHO is a really interesting thing, I almost always use shared folders between guests and hosts, it's so easy and simple WHEN IT WORKS.

  The fact that no-one comes on this thread, show what I think always: products like workstation are profoundly less used, average people IMHO use 30/40 per cent of the potential software.

  Then, with a few hours and a few Linux guests many kind in hand machines (work with tools in both modes, hgfs.ko or fuse), investigated and found how it works by myself.

  This is what I found.

  Recent versions of VMware Tools for Linux now seems to check the fuse package installed on guest system installed and when they found him, they try to use vmhgfs-fuse (formerly an Open-vm-tools executable) to mount hgfs actions without the need of the hgfs.ko module and so without needing to compile the module often broken kernel. For example, hgfs.ko thin build up to kernel branch 4.4 and it is broken again on 4.5.

  The script vmware-config - tools.pl also seems power - also when it detects the fuse package - properly configure autostart for hgfs share.

  That's all, and it's very useful for me. Hope it will be for others.

• Impossible to get files shared, open-vm-tools or vmware tools to work after upgrading Fusion 8

  I just upgraded to Fusion 8 and have been upgrading my VMs accordingly.  I went to install vmware tools as usual on Ubuntu 14.04, and the script or the pop-up said that the preferred method for this OS has been to use instead the open-vm-tools. I installed open-vm-tools, but my shared folders disappeared. I tried to install vmware-tools, since I found an old ad saying that would solve the problem, but he wants to only replace open-vm-tools.  I thought I would try anyway, but the installation fails with errors.  I completely uninstalled vmware tools and restarted open-vm-tools.  It doesn't seem to be a manual for the use of open-vm-tools.

  If open-vm-tools is the preferred method to use ubuntu on vmware, how to bring back all the features (shared folders, etc.)  Why did every upgrade VMware accompanied by pain and hard to find answers?  Or maybe I'm being really stupid.

  (this was originally released by chance in the wrong place.  It is now being published in the Fusion forum)

  OK, I FINALLY got working open-vm-tools on Ubuntu.  I'm not sure that all that was necessary, but here's what I did:

  1. Completely uninstalled vmware tools using the uninstall program
  2. Open-vm-tools, open-vm-tools-desktop and open-vm-tools-dkms is installed. I am not sure I needed everything, but at least man pages were here who has helped.
  3. At one time I used vmware-user-suid-wrapper, which defined the Office on the appropriate resolution, but is not persisted until I upgraded to Ubuntu.
  4. Updated Ubuntu Studio ot 15.04 Vervet vives.
  5. VMware-hgfsclient will show you what is actually shared by the virtual machine, even if it is not mounted.
  6. To constantly rising stocks, I added the following to the / etc/fstab: "".host: / / mnt/hgfs vmhgfs defaults 0 0 ""
  7. Rebooted and everything works now.

  Given that VMware now recommends that users use open-vm-tools instead of the deprecated vmware-tools, it would have been nice to have brief instructions on how to make the transition, rather than have me spend hours in trial and error until I have to work.

• List of linux services that aren't really necessary to a linux guest

  I run a RHEL 5.3 3.5 guest.

  It's our first guest of RHEL 5.  Are there services thar aren't really necessary in a vmware esx environment?

  acpid 0: off 1: off 2:3: on 4: on 5: on 6: off

  anacron 0: off 1: off 2:3: on 4: on 5: on 6: off

  apmd 0: off 1: off 2:3: on 4: on 5: on 6: off

  ATD 0: off 1: off 2:3 in the offshore: on 4: on 5: on 6: off

  auditd 0: off 1: off 2:3: on 4: on 5: on 6: off

  autofs 0: off 1: off 2:3 off the coast: on 4: on 5: on 6: off

  avahi-daemon 0: off 1: off 2:3 in the offshore: on 4: on 5: on 6: off

  avahi-dnsconfd 0: off 1: off 2:3 in the sea: off 4:5 off the coast: in addition to 6: off

  Bluetooth 0: off 1: off 2:3: on 4: on 5: on 6: off

  conman 0: off 1: off 2:3 in the sea: off 4:5 off the coast: in addition to 6: off

  cpuspeed 0: off 1: 2:3: on 4: on 5: on 6: off

  crond 0: off 1: off 2:3: on 4: on 5: on 6: off

  cups 0: off 1: off 2:3: on 4: on 5: on 6: off

  Firstboot 0: off 1: off 2: off 3:4:5 in the sea: on 6: off

  gpm 0: off 1: off 2:3: on 4: on 5: on 6: off

  haldaemon 0: off 1: off 2:3 in the offshore: on 4: on 5: on 6: off

  hidd 0: off 1: off 2:3: on 4: on 5: on 6: off

  hplip 0: off 1: off 2:3: on 4: on 5: on 6: off

  IP6tables 0: off 1: off 2:3: on 4: on 5: on 6: off

  iptables 0: off 1: off 2:3: on 4: on 5: on 6: off

  irqbalance 0: off 1: off 2:3: on 4: on 5: on 6: off

  kudzu 0: off 1: off 2:3 in the offshore: on 4: on 5: on 6: off

  lm_sensors 0: off 1: off 2:3: on 4: on 5: on 6: off

  LVM2-monitor 0: off 1: 2:3:4: on 5: on 6: off

  mcstrans 0: off 1: off 2:3: on 4: on 5: on 6: off

  mdmonitor 0: off 1: off 2:3: on 4: on 5: on 6: off

  messagebus 0: off 1: off 2:3 in the offshore: on 4: on 5: on 6: off

  microcode_ctl 0: off 1: off 2:3: on 4: on 5: on 6: off

  netconsole 0: off 1: off 2:3 in the sea: off 4:5 off the coast: in addition to 6: off

  netfs 0: off 1: off 2:3 in the offshore: on 4: on 5: on 6: off

  network 0: off 1: off 2:3:4: on 5: on 6: off

  nfslock 0: off 1: off 2:3 in the offshore: on 4: on 5: on 6: off

  nscd 0: off 1: off 2:3: on 4: on 5: on 6: off

  ntpd 0: off 1: off 2: off 3:4:5 in the sea: on 6: off

  pcscd 0: off 1: off 2:3: on 4: on 5: on 6: off

  portmap 0: off 1: off 2:3 in the offshore: on 4: on 5: on 6: off

  readahead_early 0: off 1: off 2:3: on 4: on 5: on 6: off

  readahead_later 0: off 1: off 2: off 3: off 4: off 5:6: off

  restorecond 0: off 1: off 2:3: on 4: on 5: on 6: off

  rhnsd 0: off 1: off 2:3 in the offshore: on 4: on 5: on 6: off

  rpcgssd 0: off 1: off 2:3 in the offshore: on 4: on 5: on 6: off

  rpcidmapd 0: off 1: off 2:3 in the offshore: on 4: on 5: on 6: off

  sendmail 0: off 1: off 2:3: on 4: on 5: on 6: off

  setroubleshoot 0: off 1: off 2:3 in the offshore: on 4: on 5: on 6: off

  smartd 0: off 1: off 2:3: on 4: on 5: on 6: off

  sshd 0: off 1: off 2:3: on 4: on 5: on 6: off

  syslog 0: off 1: off 2:3: on 4: on 5: on 6: off

  SYSSTAT 0: off 1: off 2:3:4: 5 in the sea: on 6: off

  VMware-tools 0: off 1: off 2:3:4: 5 in the sea: on 6: off

  wdaemon 0: off 1: off 2:3 in the sea: off 4:5 off the coast: in addition to 6: off

  XFS 0: off 1: off 2:3: on 4: on 5: on 6: off

  xinetd 0: off 1: off 2:3 in the offshore: on 4: on 5: on 6: off

  yum-updatesd 0: off 1: off 2:3: on 4: on 5: on 6: off

  Hello

  I would check the benchmark RHEL5 CISecurity (http://cisecurity.org) for a complete list of which can be disabled.

  Best regards
  Edward L. Haletky
  VMware communities user moderator, VMware vExpert 2009
  ====
  Author of the book ' VMWare ESX Server in the enterprise: planning and securing virtualization servers, Copyright 2008 Pearson Education.
  Blue gears and SearchVMware Pro items - top of page links of security virtualization - Security Virtualization Round Table Podcast

• My subscription security McFee is exhausted. It is equally effective download a free version, or is - it REALLY necessary to buy the version McFee.

  I used to download, Avira security. Any one can tell me whether or not it is worth paying for security? A friend also told me that my newly purchased Acer Aspire laptop will be integrated even adequate security on the Mc Fee subscription, (five days ago? For example, I thought that there is at least a built-in firewall, antivirus protection, protection against spyware and all other fundamental aspects that need protecting. I am now constantly bombarded with warnings of the tactic of fear of my eminent lap - tops * or deaths caused by viruses and other. According to me, that I am currently co-ersed in a purchase that is not really necessary. Please can someone tell me the note about this annoying problem? Would be very grateful. x

  [Moved from comments]

  If you have Windows 8 on your new Acer laptop and you no longer want to use McAfee you should disable McAfee and then uninstall McAfee and use the McAfee removal tool to be sure, McAfee is completely removed: http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe

  Windows Defender on Windows 8 (a free antimalware which is preinstalled as part of the Windows 8 operating system program) should then be enabled.  If you want to learn more about this free program, see http://experts.windows.com/w/experts_wiki/163.aspx
  If you do not want to use Windows Defender, you can install any software anti-malware program that you want to use and Windows Defender will be disabled when the third (AVG, Avira, Avast, Kaspersky, Norton, no matter) is installed.
  If you want information on other antimalware see programs
   

  http://www.techsupportalert.com/best-free-anti-virus-software.htm

  http://www.dslreports.com/forum/r28298407-2013-Anti-Virus-Poll-

  http://www.AV-Comparatives.org/

• VMWare tools update task required

  Hello people,

  Ask a question. I'm a systems engineer run the task to check whether VMtools is running or being updated. It is the necessary task vmware tools. When he runs. He gives no data. See attached picture.

  Current version Pro 6.6.2, Build 5.6.4.1 - 201207101811-246421.

  When I run other jobs against this fglam instance. They have a relationship with the data. It seems to not work. all thoughts.

  

  Looks like the FGLAM had more 2 700 vm control and couldn't return it surveys. Worked with support to properly configure the fglam_config file to accommodate the virtual machine and now he reports very well. Nice work by the support people. Thanks for your help... al

• Create a workflow to upgrade VMWare tools

  We have an alert to tell clients VMWare tools is out of date, can someone create a workflow that would allow them to begin the upgrade.

  ActionPack for VMware vCenter does not provide the necessary steps to create this workflow from including 5.5.8 release with vFoglight 6.5.1.

  We CAN fix this in future versions. Stay tuned.

  PS: Sorry for the late reply

• VMware Fusion 7 and VMware Tools - leak memory in Debian comments

  At some point during my updates from Mac OS X to Yosemite, VMware Fusion to 7.x and my Debian a guest to 8.0 "Jessie" on my 2012 Mackbook Pro, leaking memory of the Linux kernel is developed.  If I follow these steps, then I'd lose soon about 3 GB memory of the core area.

  1. Install Debian Jessie in a new machine virtual de VMware Fusion
  2. Install open-vm-tools or VMware Tools bundled.
  3. Perform an intensive IO as operation simply cat/dev/zero |-c 1000000000 head >/tmp/test.txt.
  4. Smem - wtk and see ~ 3 GB memory under the dynamics of the kernel memory, benefit.

  I opened the 15709682007 assistance request and the representative said that they will fix the problem in a future release. In the meantime, I have what seems to be a workaround for someone else that is affected.  Basically, pulling packages from backports jessie seems to have solved the problem.  This is based on the comments added to open-vm-tools.

  1. Add the Debian repository -backports jessie in /etc/apt/sources.list
  2. sudo apt - get update; sudo apt - get install t Jessie-backports open-vm-tools-dkms open-vm-Tools-Office
  3. sudo apt - get - t jessie-backports dist-upgrade (install kernel 4.1)
  4. Restart comments

  A few quick thoughts:

  1. If you have several virtual machines (or other programs) running on your computer host and VMware Fusion detects that there is memory pressure on your host computer, it uses the "balloon" (vmw_balloon for the latest distributions of Linux) Guest pilot to fly some memory of the guest OS.  This memory "stolen" would appear as memory Dynamics non-cache kernel inside the guest.  Running "sudo rmmod vmw_balloon" should release all memory climbed to the guest OS.  Note that using the balloon driver generally improves the performance of the guest and host, despite the appearance of fear "used memory" inside the guest-"used memory" is just a thing of accounting that we had to use in order to change the priority of the memory between the host and the guest.  It is not "used" in the conventional sense of the term.

  2. I believe that recent versions of virtual hardware non-cache dynamic kernel allocate the necessary memory for SVGA and 3D features (display RAM, texture RAM, etc.).  Disable graphic 3D acceleration or by reducing the amount of graphics shared memory if you are using a new version of virtual hardware (both in the VM > settings... > display) might help.  Decommissioning of a virtual equipment as early (in the VM > settings... > compatibility) can also help.

  See you soon,.

  --

  Darius

• VMware Tools missing in the Installation of VMware Player 7

  Hi all

  If I try to install/upgrade to update VMware Tools after the Installation of VMware Player 7 no ISO will be connected to the virtual machine.

  I checked the directory of Installation of VMware Player for the ISOs of the tools but no ISOs are there.

  Can you help me out of this Situation or is it a missing element in the installer?

  Thank you

  Michael

  I just downloaded VMware-player - 7.0.0 - 2305329.exe and installed under Windows 7 x 64 and had no problems with it automatically detect installed VMware Tools to the guest operating system to be downloaded and successfully downloaded.  Having said that, have you tried? : Player > file > Preferences... > download now all components

  Maybe something is blocking you to download the VMware tools.

  You could also do it manually by using the following tools from VMware for VMware Player 7.0.0.

  • Tools-freebsd - 9.9.0.exe.tar
  • Tools-linux - 9.9.0.exe.tar
  • Tools-netware - 9.9.0.exe.tar
  • Tools-solaris - 9.9.0.exe.tar
  • Tools-winPre2k - 9.9.0.exe.tar
  • tools-windows - 9.9.0.exe.tar

  Unzip the file, then run the executable result and it will silently install the file without any indication that he actually did like this isn't really so planned how to do even if it works!

• Error in win 7 certificate VmWare tools

  Hello

  I use VmWare Player 6.0.2 build-1744117 on Linux Debian. I installed win 7 on it, and when I tried to install VmWare Tools I get this error: "a certificate error occurred for the update server. Check your Internet settings or contact your system administrator.  But I don't think it's my internet settings because the internet does not work in the virtual machine (win 7) as well as my host OS. I also don't use proxy.

  How can I solve this problem? I really want to install VmWare Tools. Please help me to fix it.

  I enclose the screenshots with the error and my internet settings.

  To work around the problem, you can use the instructions of Re: Vmplayer tools error when using tools VMware files located here.

• Linux VMware Tools and their dependencies

  Hello

  I want to install VMware Tools on one Linux Virtual MACHINE created with Workstation 10.x for Windows.

  Ce Linux distribution drift since Ubuntu 13.10.

  Je would like to know What packages are needed for a correct installation et configuration of these Tools.

  Also, I have would like to know If there is a Ubuntu repository where to download and install the latest version of these Tools.

  Thank you

  Good bye

  What is the difference between VMware Tools and Open Virtual Machine Tools?

  Copy and paste this question into Google!

  By chance, you have your repository in order to always download the latest version?

  I use only VMware tools and always uninstall first Open Virtual Machine Tools and also use - clobber-kernel-modules = if necessary when installing the VMware Tools on the distributions that have Open Virtual Machine Tools installed.

• VMware Player, really bad performance.

  Hello

  I'm a really bad, unusable performance with any client VMware. I've tried combinations of:

  VMware Player and VMware 10.

  XP, Win 7, Linux Mint operating systems, among others.

  All comments VM to run incredibly slow. Some of the questions include:

  Movement of the mouse very slow/lag

  Takes less than 60 seconds for firefox, or any program to open.

  When a program is open, the shift makes it just unusable.

  I tried to install the computer virtual invited to different readers, including an SSD.

  I tried the resolutions of 800 x 600 up to full screen.

  I downloaded and installed the latest VMware tools.

  I searched and tried all the possible solutions I found on google for the last 2 weeks.

  I checked the Bios to ensure that virtualization is on.

  I tried to vary the amount of Ram and CPU available on the guest virtual machine.

  Course record:

  I7 2600 k

  mem 32g

  SSD and a couple of WD black 1 TB drives

  XFX 7950 DD Black Edition

  I am at a loss. If anyone has any ideas what else I could check it would be greatly appreciated.

  Hello Weinstein and thank you for the answer.

  The host operating system uses Win 7 Ultimate 64 bit, and for the programs that are running, it may be a fresh restart with only the usual windows services.

  With respect to the way in which the guest virtual computer is configured, I tried varying amounts of ram and cpu. But as it is currently is:

  Memory 2 GB

  2 processors 'virtualization = automatic engine.

  (SCSI) hard drive 60 GB

  NIC NAT

  Any other information needed please let me know, I'd really like to get this working. I got it on my old machine, a processor AMD/MB. When I built this Intel machine he developed suddenly problems...

  Hmm, motherboard info if no help:

  ASRock Z77 Extreme 4

  Edit... After addition of the motherboard in my google search, it may possibly be a Bios problem with this motherboard. From the looks of him, I may have to go back to an older version of bios. Investigation is ongoing.

  Edit #2... After rolling back to the version of the Bios 2.5 it seems that my problems have disappeared.

  For all those who use the ASRock Extreme 4 with a processor 2600 k flash bios to version 2.5

  There are known problems using a processor 'K' with this motherboard and VT and bios versions more recent than 2.5 seem to have done even worse...

• How to install VMware tools correctly on Linux Mint 15 cinnamon on Fusion 5.0.3

  Hello

  First of all, I understand that Linux Mint is not supported (side: anyone know if this will change?), so I appreciate any help.  My main problem is with the folders shared

  Dead ends

  So far, I've run into some dead ends:

  1. I watched install VMware Tools in Linux Mint 15 cinnamon (Olivia) - YouTube - but this facility has been the "'VMware Workstation 9.0.2 ' and the author admits"I don't know if it works or not with the fusion." "

  2 I downloaded a a copy of the latest vmwaretools for linux of deposit of CDS - /www/stage/session-32/cds/vmw-desktop/fusion/5.0.3/1040386/packages only to find it was exactly the same as the package vmwaretools this merger gives me at least VMwareTools - 9.2.2 - 893383
  

  Some success

  I had some mild success by running the following commands before installing - it seems to stop error messages:

  apt-get update
  sudo apt-get install build-essential
  sudo apt-get install linux-headers-`uname -r`
  sudo apt-get install xinetd
  

  But my MAJOR PROBLEM IS...

  When I try to activate the shared folders while the guest is running, I see a message:

  

  Or if I turn on shared folders when the guest does NOT work, I don't get an error message - but I don't see either record hgfs under/MNT

  Other research

  I read can't see the shared folders in Linux guest (Windows host) and Re: sharing files on drive betw host and the guest does not work on Ubuntu 13.04 and even tried to run the script vmtoolspatch of WoodyZ of this post - with the following result:

  user@GNS3WB62 /tmp/vmware-tools-distrib $ ./vmtoolspatch 
   
   
  patching file driver.c
  Reversed (or previously applied) patch detected!  Assume -R? [n] n
  Apply anyway? [n] y
  Hunk #1 FAILED at 152.
  Hunk #2 FAILED at 1978.
  Hunk #3 succeeded at 1962 (offset -71 lines).
  2 out of 3 hunks FAILED -- saving rejects to file driver.c.rej
  patching file inode.c
  Reversed (or previously applied) patch detected!  Assume -R? [n] n
  Apply anyway? [n] y
  Hunk #1 succeeded at 62 with fuzz 2 (offset 12 lines).
   
   
  To install VMware Tools type the following
  commands, pressing Enter after each:
   
   
  cd /tmp/vmware-tools-distrib
  sudo ./vmware-install.pl
  

  But after the installation of the VMware shared folders tools has not always worked.

  My plea

  Someone has successfully shared folder with Linux Mint 15 cinnamon (32 bit - no codecs) invited 5.0.3 fusion and if so could you share the steps that you used?

  My system Details

  I tried this using VMware Fusion 5.0.3 in both a

  MacMini running Lion Server (OS X 10.7.5) 2 GHz Intel Core i7 16 GB of DDR3 memory and a

  MacBook Pro running 2.8 GHz Intel Core Duo 8 GB DDR3 (OS X 10.8.4) Mountain Lion

  I have only this tried using Linux Mint 15 cinnamon (32 bit - no codecs)

  Well, starting with the basic installation created by using the linuxmint-15-cinnamon-dvd-nocodecs-32bit.iso image under VMware Fusion 5.0.3 I did the following.

  sudo apt - get install linux-headers-$(uname-r)

  sudo ln-s/usr/src/linux-headers-$ (uname-r)/include/generated/uapi/linux/version.h /usr/src/linux-headers-$(uname-r)/include/linux/version.h

  Excerpt from vmtoolspatch.zip in my Home Directory.

  Excerpt from the VMware Tools VMwareTools - 9.2.2 - 893683.tar.gz to: / tmp

  Open a Terminal, by default, the base directory, then:

  wkz@linuxmint15x86nc ~ $. / vmtoolspatch

  patch the file driver.c

  patching file inode.c

  To install VMware Tools, type the following command

  commands, pressing ENTER after each:

  CD/tmp/vmware-tools-distrib

  sudo./VMware-install.pl

  wkz@linuxmint15x86nc ~ $ cd/tmp/vmware-tools-distrib

  wkz@linuxmint15x86nc/tmp/vmware-tools-distrib $ sudo./vmware-install.pl

  Once VMware Tools have been installed, I rebooted and had access to the VMware shared folders.

  So it works with the basic install however I do not run apt - get update then apt - get upgrade or use one kernel other then the default.  So once the changes then the scrip may not work and I don't have time to test each variable and am just trying to give some automated solution just to make it easier to patch based on what is said in the Notes section in the script.  Really don't want to maintain it and others can build on this and or do something similar.

  Make sure that the stamp of Date/time on the file vmtoolspatch is Jul 15 00:04:00 2013 as who has worked with this test.

• Update the VMware tools cluster HA/FT

  We have a cluster running multiple 5.1 ESXi hosts and a 5.0 ESXi host. The virtual machine running on 5.1 guests show their tools VMWare is obsolete, but the virtual machine running on the 5.0 show their tools as being COMMON since with each new version of ESX, VMWare tools must also be updated. My question is: If we update VMware tools on virtual machines on 5.1, guests will be able to run on the host 5.0 if necessary? Therefore, an active cluster HA/IP hosts automatically migrated to guests according to load, etc.

  Any help is appreciated. Thank you.

  You can use the "product VMware interoperability matrices" to check compatibility. See the attached screenshot where you can see that running the ESXi 5.1 on ESXi hosts tools 5.0 is supported. You can find "the VMware product interoperability matrices" at: http://partnerweb.vmware.com/comp_guide2/sim/interop_matrix.php