Port-Based Virtual LANs (VLANs) and GVRP

GVRP

Table 11-3. Options for Handling “Unknown VLAN” Advertisements:

UnknownVLAN

Operation

Mode

 

 

 

Learn

Enables the port to become a member of any unknown VLAN for which it

(the Default)

receives an advertisement. Allows the port to advertise other VLANs that

 

have at least one other port on the same switch as a member.

Block

Prevents the port from joining any new dynamic VLANs for which it receives

 

an advertisement.

 

Allows the port to advertise other VLANs that have at least one other port

 

as a member.

Disable

Causes the port to ignore and drop all GVRP advertisements it receives and

 

also prevents the port from sending any GVRP advertisements.

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

GVRP Enabled

(Required for Unknown VLAN operation.)

Unknown VLAN Settings

Default: Learn

Figure 11-26. Example of GVRP Unknown VLAN Settings

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