H3C Technologies H3C SecPath F1000-E - Manual (Page 18)

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NOTE:
•
On a Layer 3 aggregate interface, you can create subinterfaces. These subinterfaces are logical
interfaces that operate at the network layer. They can receive VLAN tagged packets for their Layer 3
aggregate interface.
• The rate of an aggregate interface equals the total rate of its member ports in the Selected state, and its
duplex mode is the same as the selected member ports. For more information about the states of
member ports in an aggregation group, see Aggregation states of member ports in an aggregation
group .
Aggregation states of member ports in an aggregation group
A member port in an aggregation group can be in either of the following two 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 three
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 1 . A member port can be placed in the Selected
state only if it has the same class-two configurations as the aggregate interface.
Table 1 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:
•
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 thus 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.