H3C Technologies H3C S3100 Series Switches - Manual (Page 138)

Operation Manual – Link Aggregation
H3C S3100-52P Ethernet Switch Chapter 1 Link Aggregation Configuration
1-2
1.1.3 Operation Key
An operation key of an aggregation port is a configuration combination generated by
system depending on the configurations of the port (rate, duplex mode, other basic
configuration, and management key) when the port is aggregated.
1) The selected ports in a manual/static aggregation group have the same operation
key.
2) The management key of an LACP-enabled static aggregation port is equal to its
aggregation group ID.
3) The management key of an LACP-enabled dynamic aggregation port is zero by
default.
4) The member ports in a dynamic aggregation group must have the same operation
key.
1.1.4 Manual Aggregation Group
I. Introduction to manual aggregation group
A manual aggregation group is manually created. All its member ports are manually
added and can be manually removed (it inhibits the system from automatically
adding/removing ports to/from it). Each manual aggregation group must contain at least
one port. When a manual aggregation group contains only one port, you cannot
remove the port unless you remove the whole aggregation group.
LACP is disabled on the member ports of manual aggregation groups, and enabling
LACP on such a port will not take effect.
II. Port status in manual aggregation group
A port in a manual aggregation group can be in one of the two states: selected or
unselected. In a manual aggregation group, the selected ports can forward user service
packets, but the unselected ports cannot.
The selected port with the smallest port number serves as the master port of the group,
and other selected ports serve as member ports of the group.
There is a limit on the number of selected ports in an aggregation group. Therefore, if
the number of the member ports serving as selected ports in an aggregation group
exceeds the maximum number supported by the device, the system will choose the
ports with lower port numbers as the selected ports, and set others as unselected ports.
In a manual aggregation group, the system sets the ports to selected or unselected
state by the following rules:
z
The system sets the "most preferred" ports (that is, the ports take most
precedence over other ports) to selected state, and others to unselected state.
Port precedence descends in the following order: full duplex/high speed, full
duplex/low speed, half duplex/high speed, half duplex/low speed.