H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 241)

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Operational key
An operational port is a configuration set that link aggregation control automatically assigns each port
based on port attributes when aggregating ports. The configuration set contains the port rate, duplex
mode, and link state configuration.
In an aggregation group, all Selected ports are assigned the same operational key.
Class-two configurations
The contents of class-two configurations are listed in Table 84 . In an aggregation group, if the class-two
configurations of a member port are different than those of the aggregate interface, the member port
cannot be a Selected port.
Table 84 Class-two configurations
Type Considerations
Port isolation
Whether a port has joined an isolation group, and the isolation group to which the
port belongs.
VLAN
Permitted VLAN IDs, default VLAN, link type (trunk, hybrid, or access), IP
subnet-based VLAN configuration, protocol-based VLAN configuration, tag mode.
MAC address learning
MAC address learning capability, MAC address learning limit, forwarding of frames
with unknown destination MAC addresses after the upper limit of the MAC address
table is reached.
Some configurations are called class-one configurations. Such configurations, for example, MSTP, can
be configured on aggregate interfaces and member ports. However, these configurations are not
involved in operational key calculation.
Changing class-two configuration might affect the Select state of link aggregation member ports and the
ongoing service. To prevent unconsidered changes, the system displays a warning when you attempt to
change a class-two setting. You can decide whether to continue your change operation.
Link aggregation modes
Depending on the link aggregation procedure, link aggregation operates in one of the following modes:
• Static aggregation mode
• Dynamic aggregation mode
Static aggregation mode
LACP is disabled on member ports in a static aggregation group. In a static aggregation group, the
system sets a port to Selected or Unselected state by the following rules:
• The system uses a reference port-based method:
a. The system selects a port as the reference port from the ports that are in up state and that have
the same class-two configurations as the associated aggregate interface. These ports are
selected in the order of full duplex/high speed, full duplex/low speed, half duplex/high speed,
and half duplex/low speed. If two ports have the same duplex mode/speed pair, the one with
the lower port number wins.
b. The up ports that have the same port attributes and class-two configurations as the reference
port are set as the candidate selected ports. The system sets all other ports in Unselected state.