principle:
Hybrid interface may be either an access link or an ordinary terminal or a trunk link between the switches, which allow a plurality of frames by the VLAN, and VLAN tag of some frames may be peeled off in a direction out of the interface.
Hybrid interface processing VLAN frame is as follows:
(1) receives a floor frame, determines whether there is a VLAN tag. No label indicia on the PVID Hybrid interface, the next - step process; label, determining whether the frame of the Hybrid VLAN interface is allowed to enter, for allowing the next - step process, or discarded.
(2) when the data frame is sent from the Hybrid interfaces, the switch determines the VLAN interface attribute is present or Tagged Untagged Untagged If, before the release of VLAN tagged frames, retransmission; if is Tagged, the transmission frame directly. By configuring Hybrid interface enables flexible control VLAN tags, both to implement Access interface functions, but also to realize the function Trunk interface.
example:
An enterprise network using the Layer two S3700 switches S1 and S2, and two devices in different floors. Network administrators planned three different VLAN, HR departments use VLAN 10, the marketing department use VLAN20, IT departments use VLAN 30. Now we need to let the HR department and marketing departments in different floors to achieve internal communications sector, but does not allow communication between the two departments each other; IT departments can access any department. It may be achieved through more complex control configuration Hybrid VLAN interface.
Topology:
Experimental preparation:
Basic configurations
PC configuration carried out in accordance with addressing, and to ping
