Panasonic Switch-M12PWR Operation Manual page 91

Fig. 4-7-6 displays an example in which two ports of 1000BASE-T were
grouped in one and between switches was connected with 2000 Mbps
(one-way 1000 Mbps x 2).
Fig. 4-7-6 Configuration example 1 using trunking
Fig. 4-7-7 is an example in which four ports of 100BASE-TX were grouped by
two, and two ports of 1000BASE-T were grouped in one, and these were
configured as a backbone between switches.
One-way 100 Mbps
x 4 = 400 Mbps
Fig. 4-7-7 Configuration example 2 using trunking
One-way 1000 Mbps × 2 = 2000 Mbps
One-way 1000 Mbps × 2 = 2000 Mbps
One-way 100 Mbps × 4 = 400 Mbps
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