HP A6600 Configuration Manual page 19

Aggregation states of member ports in an aggregation group
A member port in an aggregation group can be in either of the following aggregation states:
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
•
state only if it has the same class-two configurations as the aggregate interface.
Table 1 Class-two configurations
Feature
Port isolation
QinQ
VLAN
MAC address learning
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.
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. GVRP and 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.
Table
Considerations
Whether the port has joined an isolation group, and the isolation group to
which the port belongs
QinQ enable state (enable/disable), TPID for VLAN tags, outer VLAN tags to be
added, inner-to-outer VLAN priority mappings, inner-to-outer VLAN tag
mappings, inner VLAN ID substitution mappings
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 capability, MAC address learning limit, forwarding of
frames with unknown destination MAC addresses after the MAC address
learning limit is reached
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1. A member port can be placed in the selected