Fixed Core And Dynamic Edge; Fixed Core And Fixed Edge; Vlan Names; Configuration Considerations - HP 9304m Installation And Getting Started Manual

Installation and Getting Started Guide

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

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's name as "STATIC_VLAN_<vlan-id>".

Configuration Considerations

• 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 vlan
<num> command at the global CONFIG level of the CLI, then save the configuration and reload the
software. The maximum number you can specify is listed in the Maximum column of the show default
values display.
• The default VLAN (VLAN 1) is not advertised by the HP implementation of GVRP. The default VLAN contains
all ports that are not members of statically configured VLANs or VLANs enabled for GVRP.
NOTE: The default VLAN has ID 1 by default. You can change the VLAN ID of the default VLAN, but only
before GVRP is enabled. You cannot change the ID of the default VLAN after GVRP is enabled.
• Single STP must be enabled on the device. HP's implementation of GVRP requires Single STP. If you do not
have any statically configured VLANs on the device, you can enable Single STP as follows:
HP9300(config)# vlan 1
HP9300(config-vlan-1)# exit
HP9300(config)# span
HP9300(config)# span single
These commands enable configuration of the default VLAN (VLAN 1), which contains all the device's ports,
and enable STP and Single STP.
• All VLANs that are learned dynamically through GVRP are added to the single spanning tree.
• All ports that are enabled for GVRP become tagged members of the GVRP base VLAN (4093). If you need to
use this VLAN ID for another VLAN, you can change the GVRP VLAN ID. See "Changing the GVRP Base
VLAN ID" on page 8-5. The software adds the GVRP base VLAN to the single spanning tree.
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