Dell PowerConnect J-EX4200-24T Software Manual page 1160

Dell PowerConnect J-Series Ethernet Switch Complete Software Guide for Junos OS
Requirements
Overview and Topology
1088
This example describes how to use GVRP to automate administration of VLAN
membership changes within your network:
Requirements on page 1088
Overview and Topology on page 1088
Configuring VLANs and GVRP on Access Switch A on page 1090
Configuring VLANs and GVRP on Access Switch B on page 1093
Configuring VLANS and GVRP on the Distribution Switch on page 1096
Verification on page 1099
This example uses the following hardware and software components:
Two J-EX4200 access switches
One J-EX4200 distribution switch
Before you configure GVRP on the access switches and on the distribution switch, be
sure you have:
Performed the initial software configuration on the switches. See "Connecting and
Configuring a J-EX Series Switch (J-Web Procedure)" on page 163.
Configured the VLANs on both the access switches and on the distribution switch.
(Dynamic VLAN configuration is not supported.)
Configured a trunk interface on all the switches.
When you are setting up your network, you should configure all VLANs on all switches,
even though some switches are not actively participating in a VLAN. Then enable GVRP
on the trunk interface of each switch. GVRP ensures that the VLAN membership
information on the trunk interface is updated as the switch's access interfaces become
active or inactive in the configured VLANs.
You do not need to take an extra step of explicitly binding a VLAN to the trunk interface.
When GVRP is enabled, the trunk interface advertises all the VLANs that are active (bound
to access interfaces) on that switch. A GVRP-enabled trunk interface does not advertise
VLANs that have been configured on the switch but that are not currently bound to an
access interface. Thus, GVRP provides the benefit of reducing network overhead—by
limiting the scope of broadcast, unknown unicast, and multicast (BUM) traffic to
interested devices only.
This example shows a network with three VLANs: finance, sales, and lab.
Access Switch A has been configured to support all three VLANS and all three VLANS
are active, bound to interfaces that are connected to personal computers:
ge-0/0/1 —Connects PC1 as member of finance vlan, VLAN ID 100
—Connects PC2 as member of lab vlan, VLAN ID 200
ge-0/0/2