H3C Technologies H3C SecPath F1000-E - Manual (Page 92)

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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
Port isolation
Whether the port has joined an isolation group, and the isolation group to which
the port belongs
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.
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.
LACP
The IEEE 802.3ad Link Aggregation Control Protocol (LACP) enables dynamic aggregation of physical
links. It uses link aggregation control protocol data units (LACPDUs) for exchanging aggregation
information between LACP-enabled devices.
1. LACP functions
The IEEE 802.3ad LACP offers basic LACP functions and extended LACP functions, as described in Table
2 .