HP Virtual Connect 8Gb 24-port Fibre Channel Module for c-Class BladeSystem - Manual (Page 69)

Network management 69
Server VLAN Tagging Support
This option provides explicit VLAN tagging support for server links, enabling each server link to be shared
among multiple networks. Users can map server VLAN-tagged Ethernet packets to specific networks,
which is essential in deploying server virtualization applications such as a virtual operating system
solution.