Справочник Пользователя для Enterasys Networks E1 Series

To dynamically create VLANs across a switched network. The GVRP command set is used to 
display GVRP configuration information, the current global GVRP state setting, individual port 
settings (enable or disable) and timer settings. By default, GVRP is enabled on all ports. 

The following sections describe the device operation when its ports are operating under the Generic 
Attribute Registration Protocol (GARP) application – GARP VLAN Registration Protocol 
(GVRP).

The purpose of GVRP is to dynamically create VLANs across a switched network. When a VLAN 
is declared, the information is transmitted out GVRP configured ports on the device in a GARP 
formatted frame using the GVRP multicast MAC address. A switch/router that receives this frame, 
examines the frame, and extracts the VLAN IDs. GVRP then creates the VLANs and adds the 
receiving port to its tagged member list for the extracted VLAN ID(s). The information is then 
transmitted out the other GVRP configured ports of the device. 

 shows an example of 

how VLAN Blue from end station A would be propagated across a switch/router network. 

In 

, Device 4, port 1 is registered as being a member of VLAN Blue and then declares 

this fact out all its ports (2 and 3) to Device 1 and Device 2. These two devices register this in the 
port egress lists of the ports (Device 1, port 1 and Device 2, port 1) that received the frames with 
the information. Device 2, which is connected to Device 3 and Device 5 declares the same 
information to those two devices and the port egress list of each port is updated with the new 
information, accordingly.