Diabling promiscuous mode during production.

[biggieinternati]

Dear all,

I have 5 ESX hosts with promiscuous mode enabled. I need to disbale it on all hosts. Is there any issues with doing this during production time on production hosts with running VM's.

Also should it be done at the vSwitch level and then on all Port groups?

Thank you in advance.

[weinstein5 · Accepted solution]

There should be no issue in disabling promiscous mode while the VMs are running - do it the vswitch because by default the port and port groups will default to the vswitch level setting -

[rickardnobel]

biggieinternational wrote:

I have 5 ESX hosts with promiscuous mode enabled. I need to disbale it on all hosts. Is there any issues with doing this during production time on production hosts with running VM's.

As long as there is no internal service in the VMs that actually need the Promiscous mode there should be no issues as Weinstein noted above.

Also should it be done at the vSwitch level and then on all Port groups?

I would say that it depends on where the configuration to allow Promiscous is done at the moment. Since it is a non default value it must have been set at either the entire vSwitch or at some/several portgroups.

A setting at a portgroup overrides something inherited from the vSwitch, so if the change has been made at a portgroup it must be changed back to default at the same place.

[biggieinternati]

Thanks guys. I disabled it without running into any issues.