Specifications

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Barracuda Networks recommends that you configure a port group to allow promiscuous mode.
Enable Promiscuous Mode on a vSwitch
Add a new port group, and set it to promiscuous mode. Then set your VM client to the port group.
Log into the client, and select the ESX host.vSphere
Click the tab.Configuration
From the in the left pane, select . Hardware menu Networking
On the summary page for the virtual switch, click the link.Properties
In the properties window that opens, you can modify the configuration by port group. Under the tab, virtual port groups arevSwitch Ports
listed. Under the tab, physical network interface cards in the server are listed. To see a summary of a port group'sNetwork Adapters
settings, click its name. In the figure below, you can see that is set to (off).Promiscuous Mode Reject
Add a port group.
Under the tab, click .Ports Add
Select and click . Virtual Machine, Next
Enter a , and set the to to enable on the port group. This creates a VMware VLAN thatNetwork Label VLAN ID 4095 trunking
lets the port group see the traffic on any VLAN without altering the VLAN tags.
Click .Finish