vlan_StripMode:
[0:no VLAN tag is stripped][1:top VLAN tag is stripped][2:all VLAN tags are stripped]
vlan_TagMode:
[1:top VLAN tag is added][2:default VLAN and stacked VLAN tags are added][3:default VLAN tag is added]
Forwarding by MAC only Forwarding by MAC and VLAN both Forwarding by MAC, VLAN and Priority
Admit both untagged and tagged packets Admit tagged packets(both priority tagged and VLAN tagged) only Admit untagged and priority tagged packets only Admit untagged packets only