Using HP-UX VLANs (September 2004)
Overview of Installation and Configuration
Promiscuous Mode Characteristics
Chapter 2 33
Promiscuous Mode Characteristics
Only one stream can run in the unbound promiscuous mode per physical
interface and all the VLAN interfaces created over it.
A promiscuous stream on the physical interface sees all the frames
transmitted or received on the physical LAN card port, both tagged and
untagged frames.
A promiscuous stream on a VLAN interface sees only tagged frames with
the same VLAN ID as that of the VLAN interface.