Parameters for controlling VLAN propagation behavior

You can configure an individual port to actively or passively participate in dynamic VLAN propagation or to ignore dynamic VLAN (GVRP) operation. These options are controlled by the GVRP "Unknown VLAN" and the static VLAN configuration parameters, as described in the following table.

Controlling VLAN behavior on ports with static VLANs

Per-Port "Unknown VLAN" (GVRP) configuration

Static VLAN Options—Per VLAN Specified on Each Port1

Port Activity: Tagged or Untagged (Per VLAN)2

Port Activity: Auto2 (Per VLAN)

Port Activity: Forbid (Per VLAN)2

Learn (the Default)

The port:

  • Belongs to specified VLAN.

  • Advertises specified VLAN.

  • Can become a member of dynamic VLANs for which it receives advertisements.

  • Advertises dynamic VLANs that have at least one other port (on the same switch) as a member.

The port:

  • Will become a member of specified VLAN if it receives advertisements for specified VLAN from another device.

  • Will advertise specified VLAN.

  • Can become a member of other, dynamic VLANs for which it receives advertisements.

  • Will advertise a dynamic VLAN that has at least one other port (on the same switch) as a member.

The port:

  • Will not become a member of the specified VLAN.

  • Will not advertise specified VLAN.

  • Can become a member of other dynamic VLANs for which it receives advertisements.

  • Will advertise a dynamic VLAN that has at least one other port on the same switch as a member.

Block

The port:

  • Belongs to the specified VLAN.

  • Advertises this VLAN.

  • Will not become a member of new dynamic VLANs for which it receives advertisements.

  • Will advertise dynamic VLANs that have at least one other port as a member.

The port:

  • Will become a member of specified VLAN if it receives advertisements for this VLAN.

  • Will advertise this VLAN.

  • Will not become a member of new dynamic VLANs for which it receives advertisements.

  • Will advertise dynamic VLANs that have at least one other port (on the same switch) as a member.

The port:

  • Will not become a member of this VLAN.

  • Will ignore GVRP PDUs.

  • Will not join any dynamic VLANs.

  • Will not advertise VLANs.

Disable

The port:

  • Is a member of the specified VLAN.

  • Will ignore GVRP PDUs.

  • Will not join any advertised VLANs.

  • Will not advertise VLANs.

The port:

  • Will not become a member of the specified VLAN.

  • Will ignore GVRP PDUs.

  • Will not join any dynamic VLANs.

  • Will not advertise VLANs.

The port:

  • Will not become a member of this VLAN.

  • Will ignore GVRP PDUs.

  • Will not join any dynamic VLANs.

  • Will not advertise VLANs.

1Each port of the switch must be a Tagged or Untagged member of at least one VLAN. Thus, any port configured for GVRP to Learn or Block will generate and forward advertisements for static VLAN(s) configured on the switch and also for dynamic VLANs the switch learns on other ports.

2To configure tagging, Auto, or Forbid, see Configuring or changing static VLAN per-port settings (CLI).

As the preceding table indicates, when you enable GVRP, a port that has a Tagged or Untagged static VLAN has the option for both generating advertisements and dynamically joining other VLANs.

NOTE:

In the table above, the Unknown VLAN parameters are configured on a per-port basis using the CLI. The Tagged, Untagged, Auto, and Forbid options are configured per static VLAN on every port.

Because dynamic VLANs operate as Tagged VLANs and because a tagged port on one device cannot communicate with an untagged port on another device, Hewlett Packard Enterprise recommends that you use Tagged VLANs for the static VLANs you will use to generate advertisements.