3com 3CBLSF26H Manual De Usuario
3-25
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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.
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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 switch,
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.
2) 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).
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.
A port in a static aggregation group can be in one of the two states: selected or unselected.
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Both the selected and the unselected ports in the up state can receive/send LACP protocol
packets.
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Only the selected ports can receive/send 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.
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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.
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The ports connected to a peer device different from the one the master port is connected to, or
those connected to the same peer device as the master port but to a peer port that is not in the
same aggregation group as the peer port of the master port, are unselected ports.
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The system sets the ports with basic port configuration different from that of the master port to
unselected state.
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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 switch,
those with lower port numbers operate as the selected ports, and others as unselected ports.
Configuring Link Aggregation
This section includes the following topics:
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Defining Link Aggregation
The Link Aggregation Create Page allows network managers to create LAGs and add ports to a LAG.