Panasonic Switch-M12PWR, Operation Manual

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4.7.2.a About Link aggregation
Link aggregation is a function that is possible to increase bandwidth
between switches by grouping multiple Switching Hub ports and
connecting the grouped ports each other. Using this Link Aggregation
function is called as trunking.
This Switching Hub supports the LACP (Link Aggregation Control Protocol)
specified in IEEE802.3ad.
By this, it is possible to construct Link Aggregation up to 8 ports per
group.
Fig. 4-7-6 and Fig. 4-7-7 show examples of network construction using
trunking.
Note: In this Switching Hub, it is not possible to construct a trunking system
in which 100M-port and Giga-port are mixed.
Combined usage of Spanning Tree mode and Internet Mansion
mode is not possible.
Note: Depending on number of ports in group or traffic condition, traffic
may not be assigned uniformly to all the ports in the
link-aggregation group.