Purpose; Example Of Vlan Propagation Via Gvrp - Enterasys G3G170-24 Cli Reference Manual

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. Figure
how VLAN blue from end station A would be propagated across a switch network.
How It Works
In Figure 7‐1 on page 7‐19, Switch 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 Switch 1 and Switch 2. These two devices
register this in the port egress lists of the ports (Switch 1, port 1 and Switch 2, port 1) that received
the frames with the information. Switch 2, which is connected to Switch 3 and Switch 5 declares
the same information to those two devices and the port egress list of each port is updated with the
new information, accordingly.
Configuring a VLAN on an 802.1Q switch creates a static VLAN entry. The entry will always
remain registered and will not time out. However, dynamic entries will time‐out and their
registrations will be removed from the member list if the end station A is removed. This ensures
that, if switches are disconnected or if end stations are removed, the registered information
remains accurate.
The end result is that the port egress list of a port is updated with information about VLANs that
reside on that port, even if the actual station on the VLAN is several hops away.
Figure 7-1

Purpose

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

Example of VLAN Propagation via GVRP

Enabling/Disabling GVRP (GARP VLAN Registration Protocol)
R
D
7‐1 shows an example of
Enterasys G-Series CLI Reference 7-19