H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 50)

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• Selected—A Selected port can forward user traffic.
• Unselected—An Unselected port cannot forward user traffic.
Operational key
When aggregating ports, the system automatically assigns each port an operational key based on port
information such as port rate and duplex mode. Any change to this information triggers a recalculation
of the operational key.
In an aggregation group, all selected member ports are assigned the same operational key.
Configuration classes
Every configuration setting on a port may affect its aggregation state. Port configurations fall into the
following classes:
• Port attribute configurations, including port rate, duplex mode, and link status (up/down), which
are the most basic port configurations.
• Class-two configurations, as described in Table 6 . A member port can be placed in Selected state
only if it has the same class-two configurations as the aggregate interface. Class-two configurations
made on an aggregate interface are automatically synchronized to all its member ports. These
configurations are retained on the member ports even after the aggregate interface is removed.
Table 6 Class-two configurations
Feature Considerations
VLAN
Permitted VLAN IDs, PVID, link type (trunk, hybrid, or access), IP subnet-based
VLAN configuration, protocol-based VLAN configuration, VLAN tagging mode
MAC address learning
MAC address learning capability, MAC address learning limit, forwarding of
frames with unknown destination MAC addresses after the MAC address
learning limit is reached
NOTE:
Any class-two configuration change may affect the aggregation state of link aggregation member ports
and ongoing traffic. To make sure that you are aware of the risk, the system displays a warning message
every time you attempt to change a class-two configuration setting on a member port.
• Class-one configurations do not affect the aggregation state of the member port even if they are
different from those on the aggregate interface. MSTP settings are examples of class-one
configurations. The class-one configuration for a member port is effective only when the member
port leaves the aggregation group.
Reference port
When setting the aggregation state of the ports in an aggregation group, the system automatically picks
a member port as the reference port. A Selected port must have the same port attributes and class-two
configurations as the reference port.
Aggregating links in static mode
LACP is disabled on the member ports in a static aggregation group. You must manually maintain the
aggregation state of the member ports.
The static link aggregation procedure comprises:
• Selecting a reference port