3com WX3000 User Manual

 

1-2 

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. 

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. 

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 

Among the ports in an aggregation group that are in up state, the system determines the mater port 

with one of the following settings being the highest (in descending order) as the master port: full 

duplex/high speed, full duplex/low speed, half duplex/high speed, half duplex/low speed. The ports 

with their rate, duplex mode and link type being the same as that of the master port are selected 

ports, and the rest are unselected ports. 

z 

The system sets the ports unable to aggregate with the master port (due to some hardware limit) to 

unselected state. 

Generally, there is no limit on the rate and duplex mode of the ports (also including initially DOWN port) 

you want to add to a manual aggregation group. After aggregation, the smallest-numbered selected 

port is the master port of the aggregation group and the other selected ports are the member ports of the 

aggregation group.