H3C Technologies H3C S3100 Series Switches - Manual (Page 160)

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z When the rate or duplex mode of a port in the aggregation group changes, packet loss may occur
on this port;
z When the rate of a port decreases, if the port belongs to a manual or static LACP aggregation
group, the port will be switched to the unselected state; if the port belongs to a dynamic LACP
aggregation group, deaggregation will occur on the port.
Aggregation Group Categories
Depending on whether or not load sharing is implemented, aggregation groups can be load-sharing or
non-load-sharing aggregation groups. When load sharing is implemented,
z The S3100-EI series Ethernet switches perform load-sharing for IP packets based on the source IP
address and destination IP address, and for non-IP packets based on the source MAC address.
z The S3100-SI series Ethernet switches perform load-sharing based on the source MAC address
and destination MAC address for both IP and non-IP packets.
In general, the system only provides limited load-sharing aggregation resources, so the system needs
to reasonably allocate the resources among different aggregation groups.
The system always allocates hardware aggregation resources to the aggregation groups with higher
priorities. When load-sharing aggregation resources are used up by existing aggregation groups,
newly-created aggregation groups will be non-load-sharing ones.
Load-sharing aggregation resources are allocated to aggregation groups in the following order:
z An aggregation group containing special ports which require hardware aggregation resources has
higher priority than any aggregation group containing no special port.
z A manual or static aggregation group has higher priority than a dynamic aggregation group (unless
the latter contains special ports while the former does not).
z For aggregation groups, the one that might gain higher speed if resources were allocated to it has
higher priority than others. If the groups can gain the same speed, the one with smallest master
port number has higher priority than other groups.
When an aggregation group of higher priority appears, the aggregation groups of lower priorities
release their hardware resources. For single-port aggregation groups, they can transceive packets
normally without occupying aggregation resources
A load-sharing aggregation group contains at least two selected ports, but a non-load-sharing
aggregation group can only have one selected port at most, while others are unselected ports.