# VMware CPU id mask **URL:** \ **Category:** Chatting over the Back Fence\ **Created:** [February 29, 2012, 10:18pm UTC](https://forums.suse.com/t/vmware-cpu-id-mask/22286 "2012-02-29T22:18:38Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![System1](https://avatars.discourse-cdn.com/v4/letter/s/51bf81/32.png) [@System1](https://forums.suse.com/u/System1)\ **Post date:** [February 29, 2012, 10:18pm UTC](https://forums.suse.com/t/vmware-cpu-id-mask/22286/1 "2012-02-29T22:18:38Z")
Anyone ever set up masks to hide/enable cpu capabilities within vmware? We have 4 hosts for our VDI setup, I’d like to get VMotion working between all 4. Currently if you’re trying to VMotion between the two older ones to the two newer ones, it cannot be done w/o powering the VM down due to CPU ‘incompatibilities’. Certain portions of the cpu id mask can be ‘hidden’ from the VM to allow for easier VMotion. Any help on this would be greatly appreciated. – Stevo ---
**Author:** ![system](https://us1.discourse-cdn.com/flex022/uploads/suse/original/2X/5/5012ba89e3ffb5220dac47d5ea0ba032e2fe1cb6.png) [@system](https://forums.suse.com/u/system)\ **Post date:** [March 13, 2012, 5:06pm UTC](https://forums.suse.com/t/vmware-cpu-id-mask/22286/2 "2012-03-13T17:06:02Z")
Stevo;2178343 Wrote:[color=blue] > Anyone ever set up masks to hide/enable cpu capabilities within vmware? > > We have 4 hosts for our VDI setup, I’d like to get VMotion working > between all 4. Currently if you’re trying to VMotion between the two > older ones to the two newer ones, it cannot be done w/o powering the VM > down due to CPU ‘incompatibilities’. Certain portions of the cpu id > mask can be ‘hidden’ from the VM to allow for easier VMotion. > > Any help on this would be greatly appreciated. > > – > Stevo[/color] > [http://www.vmware.com/files/pdf/vmotion\_info\_guide.pdf](http://www.vmware.com/files/pdf/vmotion_info_guide.pdf) Wouldn’t it be easier just enabling EVC in your cluster? ## – bpenris bpenris’s Profile: [http://forums.novell.com/member.php?userid=7496](http://forums.novell.com/member.php?userid=7496) View this thread: [http://forums.novell.com/showthread.php?t=452802](http://forums.novell.com/showthread.php?t=452802) ---
**Author:** ![system](https://us1.discourse-cdn.com/flex022/uploads/suse/original/2X/5/5012ba89e3ffb5220dac47d5ea0ba032e2fe1cb6.png) [@system](https://forums.suse.com/u/system)\ **Post date:** [March 20, 2012, 3:46pm UTC](https://forums.suse.com/t/vmware-cpu-id-mask/22286/3 "2012-03-20T15:46:55Z")
bpenris sounds like they ‘said’: [color=blue] > Wouldn’t it be easier just enabling EVC in your cluster?[/color] So my response to bpenris’s comment is… Yeah, we figured out what we needed to do for that. We didn’t realize we needed to have _all_ VM’s shut down on these hosts to do that. – Stevo ---
**Author:** ![system](https://us1.discourse-cdn.com/flex022/uploads/suse/original/2X/5/5012ba89e3ffb5220dac47d5ea0ba032e2fe1cb6.png) [@system](https://forums.suse.com/u/system)\ **Post date:** [April 10, 2012, 4:48am UTC](https://forums.suse.com/t/vmware-cpu-id-mask/22286/4 "2012-04-10T04:48:28Z")
Stevo wrote: [color=blue] > bpenris sounds like they ‘said’: > [color=green] > > > Wouldn’t it be easier just enabling EVC in your cluster?[/color] > > So my response to bpenris’s comment is… > > Yeah, we figured out what we needed to do for that. We didn’t realize > we needed to have _all_ VM’s shut down on these hosts to do that. > [/color] I take it you have an Essentials License so you have vCenter? for vMotion to work when VMs are up, its a requirement Also consider the following: network setup, all separate subnets vmk0 Management Network – on vSwitch0 (standard switch) – on uplink vmnic0 vMotion network – on vSwitch1 (standard switch) – on uplink vmnic1 storage if iSCSI – on vSwitch2 (standard switch) – on uplink vmnic2 VM network – on vSwitch3 (standard switch or dvSwitch/Cisco Nexus 1000v) – on uplink vmnic3 through how ever many you can aggrigate together ---
**Author:** ![system](https://us1.discourse-cdn.com/flex022/uploads/suse/original/2X/5/5012ba89e3ffb5220dac47d5ea0ba032e2fe1cb6.png) [@system](https://forums.suse.com/u/system)\ **Post date:** [April 10, 2012, 2:26pm UTC](https://forums.suse.com/t/vmware-cpu-id-mask/22286/5 "2012-04-10T14:26:01Z")
Harv, TSE, GSS, VMware;2187989 Wrote:[color=blue] > Stevo wrote: > [color=blue] > I take it you have an Essentials License so you have vCenter? > for vMotion to work when VMs are up, its a requirement > > Also consider the following: > > network setup, all separate subnets > > vmk0 Management Network – on vSwitch0 (standard switch) – on uplink > vmnic0 > > vMotion network – on vSwitch1 (standard switch) – on uplink vmnic1 > > storage if iSCSI – on vSwitch2 (standard switch) – on uplink vmnic2 > > VM network – on vSwitch3 (standard switch or dvSwitch/Cisco Nexus > 1000v) – > on uplink vmnic3 through how ever many you can aggrigate together[/color] > I disagree with that. Just throw all the NIC’s on one vSwitch and use > VLAN’s. I know it’s against design regulations but the often heard > ‘security considerations’ are bullocks imho. If you can’t trust VLAN’s > anymore you can’t trust anything. Don’t use distributed switches for > anything more than machines that can afford to lose the network > connection. If your vCenter server needs maintenance your distributed > switch goes down. ## – bpenris bpenris’s Profile: [http://forums.novell.com/member.php?userid=7496](http://forums.novell.com/member.php?userid=7496) View this thread: [http://forums.novell.com/showthread.php?t=452802](http://forums.novell.com/showthread.php?t=452802)