Enterasys 2200 Betriebsanweisung

VLAN Operation

VLAN Operation and Network Applications

GARP is a protocol used to propagate state information throughout a switched network.

A GARP application used to dynamically create VLANs across a switched network.

A GARP application that functions in a similar fashion as GVRP, except that GMRP registers 
multicast addresses on ports to control the flooding of multicast frames. 

The following sections describe the operation of a VLAN switch and discusses the operations that 
a VLAN switch performs in response to both normal and VLAN-originated network traffic.

The 802.1Q VLAN operation is slightly different than the operation of traditional switched 
networking systems. These differences are due to the importance of keeping track of each frame 
and its VLAN association as it passes from switch to switch or from port to port within a switch.

Before describing the operation of an 802.1Q VLAN, it is important to understand the basic 
elements that are combined to make up an 802.1Q VLAN. 

A station is any end unit that belongs to a network. In the vast majority of cases, stations are the 
computers through which the users access the network.

In order to configure a group of stations into a VLAN, the stations must be connected to 
VLAN-aware switches. It is the job of the switch to classify received frames into VLAN 
memberships and transmit frames, according to VLAN membership, with or without a VLAN Tag 
Header.