Configuring Advanced

Features

 

 

Configuring Advanced Features

GVRP

Per-Port Options for Dynamic VLAN Advertising and

Joining

Initiating Advertisements. As described in the preceding section, to enable dynamic joins, GVRP must be enabled and a port must be configured to Learn (the default). However, to send advertisements in your network, one or more Tagged or Untagged static VLANs must be configured on one or more switches (with GVRP enabled), depending on your topology.

Enabling a Static VLAN for Dynamic Joins. You can configure a port to dynamically join a static VLAN (that shares the same VID) if that port subsequently receives an advertisement for the static VLAN. (This is done by using the Auto and Learn options described in table 9-9,below.

Parameters for Controlling VLAN Propagation Behavior. On an individual port, you can configure an existing static VLAN 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:

Table 9-9. Controlling VLAN Behavior on Ports with Static VLANs

Per-Port “Unknown VLAN”

Per-Port Static VLAN Options 1

 

(GVRP) Configuration

 

 

 

Tagged or Untagged2

Auto2

Forbid2

 

Learn

Generate advertisements.

Receive advertisements and

Do not allow the

(the Default)

Forward advertisements for other

dynamically join any

port to become a

 

VLANs.

advertised VLAN that has the

member of this

 

Receive advertisements and

same VID as the static VLAN.

VLAN.

 

 

 

 

dynamically join any advertised

 

 

 

VLAN.

 

 

 

 

 

 

Block

Generate advertisements.

Receive advertisements and

Do not allow the

 

Forward advertisements received

dynamically join any

VLAN on this port.

 

from other ports for other VLANs.

advertised VLAN that has the

 

 

Do not dynamically join any

same VID.

 

 

 

 

 

advertised VLAN.

 

 

 

 

 

 

Disable

Ignore GVRP and drop all GVRP

Ignore GVRP and drop all GVRP

Do not allow the

 

advertisements.

advertisements.

VLAN on this port.

 

 

 

 

1Each port of a Series 2500 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 the static VLAN(s) for which it has been configured as Tagged or Untagged . By default, all ports are Untagged members of the default VLAN (VID = 1). See the “Note” on page page 9-78.

2To configure tagging, Auto, or Forbid, see “Configuring Static VLAN Name and Per-Port Settings” on page 9-67(for the CLI) or “Adding or Changing a VLAN Port Assignment” on page 9-60(for the menu).

9-82