HP 4108GL Management And Configuration Manual page 346

Port-Based Virtual LANs (VLANs) and GVRP
GVRP
Enabling and Disabling GVRP on the Switch. This command enables
GVRP on the switch.
Syntax:
This example enables GVRP:
This example disables GVRP operation on the switch:
Enabling and Disabling GVRP On Individual Ports. When GVRP is
enabled on the switch, use the unknown-vlans command to change the
Unknown VLAN field for one or more ports. You can use this command at
either the Manager level or the interface context level for the desired port(s).
Syntax:
For example, to change and view the configuration for ports 1-2 to Block:
14-40
gvrp
interface <port-list> unknown-vlans Changes the Unknown VLAN
<learn | block | disable> field setting for the specified
port(s).