Load sharing mode of an aggregation group, Configuration guidelines – H3C Technologies H3C WX3000E Series Wireless Switches User Manual
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In an aggregation group, a candidate Selected port must have the same port attributes and
class-two configurations as the reference port. To keep these configurations consistent, you should
configure the port correctly.
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Changing port attributes or class-two configuration for a port might change the Select state of the
port and other member ports. This might affect services. H3C recommends that you do change
operations with caution.
Load sharing mode of an aggregation group
A link aggregation groups operates in load sharing aggregation mode or non-load sharing mode.
The system sets the load sharing mode of an aggregation group by the following rules:
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When hardware resources are available, a link aggregation group that has at least two Selected
ports operates in load sharing mode.
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When the number of created aggregation groups reaches the upper threshold, all new link
aggregation groups operate in non-load sharing mode.
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A load-sharing aggregation group contains at least one Selected port, but a non-load-sharing
aggregation group can only have a maximum of one Selected port.
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When hardware resources are insufficient, all new link aggregation groups operate in non-load
sharing mode. They will not provide load sharing even after resources become sufficient again. To
provide load sharing, you can re-enable their associated aggregation interfaces by shutting down
and then bringing up the interfaces.
Configuration guidelines
When you configure a link aggregation group, follow these guidelines:
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In an aggregation group, a candidate Selected port must have the same port attributes and
class-two configurations as the reference port. To keep these configurations consistent, you should
configure the port correctly.
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For a reference port, it is selected from the up ports that have the same class-two configurations as
the associated aggregate interface. These ports are selected in the order of full duplex/high speed,
full duplex/low speed, half duplex/high speed, and half duplex/low speed. If two ports have the
same duplex mode/speed pair, the one with the lower port number wins.
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Port attributes contain port rate, duplex mode, and link state. For more information about class-two
configurations, see "
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To provide successful static aggregation, make sure the ports at the two ends of each aggregated
link have the same Selected/Unselected state. To provide successful dynamic aggregation, make
sure the local ports and peer ports are both aggregated. In dynamic aggregation, the two ends can
automatically negotiate the Select state of the ports.
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Removing a Layer 2 aggregate interface also removes the associated aggregation group.
Meanwhile, the member ports of the aggregation group, if any, are also removed from the
aggregation group.
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When a load-sharing aggregation group becomes a non-load-sharing aggregation group because
of insufficient load sharing resources, one of the following problems might have occurred:
The number of Selected ports of the actor is inconsistent with that of the partner, which might
result in incorrect traffic forwarding.