Master VLAN and Member VLANs

Each topology group contains a master VLAN and can contain one or more member VLANs and VLAN groups:

  • Master VLAN - The master VLAN contains the configuration information for the Layer 2 protocol. For example, if you plan to use the topology group for MRP, the topology group master VLAN contains the ring configuration information.
  • Member VLANs - The member VLANs are additional VLANs that share ports with the master VLAN. The Layer 2 protocol settings for the ports in the master VLAN apply to the same ports in the member VLANs. A change to the master VLAN Layer 2 protocol configuration or Layer 2 topology affects all the member VLANs. Member VLANs do not independently run a Layer 2 protocol.
  • Member VLAN groups - A VLAN group is a named set of VLANs. The VLANs within a VLAN group have the same ports and use the same values for other VLAN parameters.

When a Layer 2 topology change occurs on a port in the master VLAN, the same change is applied to that port in all the member VLANs that contain the port. For example, if you configure a topology group for which the master VLAN contains ports 1/1/1 and 1/1/2, a Layer 2 state change on port 1/1/1 applies to port 1/1/1 in all the member VLANs that contain that port. However, the state change does not affect port 1/1/1 in VLANs that are not members of the topology group.

Parent topic: Topology Groups