Control how inbound and outbound frames for a dvPort are handled by editing the Security policies.

To edit the Security policies on an individual dvPort, the associated dvPort group must be set to allow policy overrides.


Log in to the vSphere Client and display the vNetwork Distributed Switch.


On the Ports tab, right-click the port to modify and select Edit Settings.


Click Policies.

By default, Promiscuous Mode is set to Reject, and MAC Address Changes and Forged Transmits are set to Accept.


In the Security group, select whether to reject or accept the security policy exceptions.

Policy Exceptions




Promiscuous Mode

Placing a guest adapter in promiscuous mode has no effect on which frames are received by the adapter.

Placing a guest adapter in promiscuous mode causes it to detect all frames passed on the vSwitch that are allowed under the VLAN policy for the port group that the adapter is connected to.

MAC Address Changes

If the guest OS changes the MAC address of the adapter to anything other than what is in the .vmx configuration file, all inbound frames are dropped.

If the guest OS changes the MAC address back to match the MAC address in the .vmx configuration file, inbound frames are sent again.

If the MAC address from the guest OS changes, frames to the new MAC address are received.

Forged Transmits

Outbound frames with a source MAC address that is different from the one set on the adapter are dropped.

No filtering is performed, and all outbound frames are passed.


Click OK.