H3C Technologies H3C S10500 Series Switches - Manual (Page 44)

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NOTE:
•
On a Layer 3 aggregate interface, you can create subinterfaces. The Layer 3 aggregate 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 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 might affect its aggregation state. Port configurations fall into the
following classes:
• Port attribute configurations, including port rate, duplex mode, and link status (up/down). These
are the most basic port configurations.
• Class-two configurations. A member port can be placed in the Selected state only if it has the same
class-two configurations as the aggregate interface.
Table 2 Class-two configurations
Feature Considerations
Port isolation Whether the port has joined an isolation group
QinQ
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
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