LevelOne FGP-2472 - Manual (Page 83)

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26:
Except Port 26, each port of the switch cannot transmit packets
with each other. Each port groups a VLAN with Port 26, thus, total
8 groups consisting of 2 members are formed.
25&26:
Except Port 25 and Port 26, each port of the switch cannot transmit
packets with each other. Each port groups a VLAN with Port 25
and Port 26, thus, total 8 groups consisting of 3 members are
formed.