Operation Manual – Link Aggregation
H3C S3100 Series Ethernet Switches Chapter 1 Link Aggregation Configuration
1-5
priorities, then the two port numbers if the two port priorities are equal; the port
with the smallest port ID is the selected port and the left ports are unselected ports.
 Note:
For an aggregation group:
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.
1.3 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).
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