Configuration types

Every configuration setting on a port might affect its aggregation state. Port configurations include the following types:

• Attribute configurations—To become a Selected port, a member port must have the same attribute configurations as the aggregate interface. Table 2 describes the attribute configurations.

  Attribute configurations made on an aggregate interface are automatically synchronized to all member ports. These configurations are retained on the member ports even after the aggregate interface is removed.

  Any attribute configuration change might affect the aggregation state of link aggregation member ports and running services. The system displays a warning message every time you try to change an attribute configuration setting on a member port.

  Table 2: Attribute configurations

  Feature	Considerations
  Port isolation	Indicates whether the port has joined an isolation group and which isolation group the port belongs to.
  QinQ	QinQ enable state (enabled/disabled), TPID for VLAN tags, and VLAN transparent transmission. For information about QinQ, see "Configuring QinQ."
  VLAN mapping	Different types of VLAN mapping configured on the port. For more information about VLAN mapping, see "Configuring VLAN mapping."
  VLAN	Permitted VLAN IDs. PVID. Link type (trunk, hybrid, or access). Operating mode (promiscuous, trunk promiscuous, host). VLAN tagging mode. For information about VLAN, see "Configuring VLANs."

• Protocol configurations—Protocol configurations do not affect the aggregation state of the member ports. MAC address learning and spanning tree settings are examples of protocol configurations.

	NOTE: The protocol configuration for a member port is effective only when the member port leaves the aggregation group.