HP 2500 manual Options for Handling Unknown Vlan Advertisements, Mode

Configuring Advanced Features

GVRP

Table 9-8. Options for Handling “Unknown VLAN” Advertisements:

UnknownVLAN	Operation
Mode
Learn	Enables the port to dynamically join any VLAN for which it receives an
(the Default)	advertisement, and allows the port to forward advertisements it receives.
Block	Prevents the port from dynamically joining a VLAN that is not statically
	configured on the switch. The port will still forward advertisements that
	were received by the switch on other ports. Block should typically be used
	on ports in unsecure networks, where there is exposure to “attacks”, such
	as ports where intruders can connect.
Disable	Causes the port to ignore and drop all advertisements it receives from any
	source.

The CLI show gvrp command and the menu interface VLAN Support screen show a switch’s current GVRP configuration, including the Unknown VLAN settings.

Features Configuring Advanced

GVRP Enabled

(Required for Unknown VLAN operation.)

Unknown VLAN Settings

Default: Learn

Figure 9-59. Example of GVRP Unknown VLAN Settings

The above options also influence GVRP operation on ports where static VLANs are configured. (See the next section.)

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