Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 218)

Dynamic core and dynamic edge
GVRP is enabled on the core device and on the edge devices. This type of configuration is useful if
the devices in the edge clouds are running GVRP and advertise their VLANs to the edge devices. The
edge devices learn the VLANs and also advertise them to the core. In this configuration, you do not
need to statically configure the VLANs on the edge or core devices, although you can have statically
configured VLANs on the devices. The devices learn the VLANs from the devices in the edge clouds.
Fixed core and dynamic edge
GVRP learning is enabled on the edge devices. The VLANs on the core device are statically
configured, and the core device is enabled to advertise its VLANs but not to learn VLANs. The edge
devices learn the VLANs from the core.
Fixed core and fixed edge
The VLANs are statically configured on the core and edge devices. On each edge device, VLAN
advertising is enabled but learning is disabled. GVRP is not enabled on the core device. This
configuration enables the devices in the edge clouds to learn the VLANs configured on the edge
devices.
VLAN names created by GVRP
The show vlans command lists VLANs created by GVRP as "GVRP_VLAN_vlan-id ". VLAN names
for statically configured VLANs are not affected. To distinguish between statically-configured VLANs
that you add to the device and VLANs that you convert from GVRP-configured VLANs into statically-
configured VLANs, the show vlans command displays a converted VLAN name as
"STATIC_VLAN_vlan-id ".
Configuration notes for GVRP
• If you disable GVRP, all GVRP configuration information is lost if you save the configuration change
(write memory command) and then reload the software. However, if you reload the software
without first saving the configuration change, the GVRP configuration is restored following a
software reload.
• The maximum number of VLANS supported on a device enabled for GVRP is the same as the
maximum number on a device that is not enabled for GVRP.
‐ To display the maximum number of VLANs allowed on your device, enter the show
default values command. See the "vlan" row in the System Parameters section. Make
sure you allow for the default VLAN (1), the GVRP base VLAN (4093), and the Single STP
VLAN (4094). These VLANs are maintained as "Registration Forbidden" in the GVRP
database. Registration Forbidden VLANs cannot be advertised or learned by GVRP.
‐ To increase the maximum number of VLANs supported on the device, enter the system-
max vlannum command at the global CONFIG level of the CLI, then save the
Dynamic core and dynamic edge
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