H3C Technologies H3C S12500-X Series Switches - Manual (Page 47)

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• Unselected—An Unselected port cannot forward 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 ports are assigned the same operational key.
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. To make sure that you are aware of the risk, the system displays a
warning message every time you attempt 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 the isolation group
to which the port belongs.
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), and VLAN tagging mode. For
information about VLAN, see "Configuring VLANs."
• Protocol configurations—As opposed to attribute configurations, protocol configurations do not
affect the aggregation state of the member ports, even if they are different from those on the
aggregate interface. 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.