H3C Technologies H3C S3100 Series Switches - Manual (Page 158)

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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 you cannot enable LACP on
ports in a manual aggregation group.
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, only the selected ports can forward user service packets.
In a manual aggregation group, the system sets the ports to selected or unselected state according to
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 There is a limit on the number of selected ports in an aggregation group. Therefore, if the number of
the selected ports in an aggregation group exceeds the maximum number supported by the device,
those with lower port numbers operate as the selected ports, and others as unselected ports.
Among the selected ports in an aggregation group, the one with smallest port number operates as the
master port. Other selected ports are the member ports.
Requirements on ports for manual aggregation
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.
Static LACP Aggregation Group
Introduction to static LACP aggregation
A static LACP aggregation group is also 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 static aggregation group must contain at least one port. When a static aggregation group contains
only one port, you cannot remove the port unless you remove the whole aggregation group.
LACP is enabled on the member ports of static aggregation groups. When you remove a static
aggregation group, all the member ports in up state form one or multiple dynamic aggregations with
LACP enabled. LACP cannot be disabled on static aggregation ports.
Port status of static aggregation group
A port in a static aggregation group can be in one of the two states: selected or unselected.
z Both the selected and the unselected ports in the up state can transceive LACP protocol packets.
z Only the selected ports can transceive service packets; the unselected ports cannot.
In a static aggregation group, the system sets the ports to selected or unselected state according to the
following rules.
z Among the ports in an aggregation group that are in up state, the system determines the master
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 port, and the rest are unselected ports.