3.6 Trunk
Trunk is used to expand the bandwidth (e.g. hot backup
and error tolerance of the inter-switch cascading the
Uplink channels).
All ports set as the trunk group members can be used by
the trunk group only and cannot be used for any other
purpose, even when they are not being used by the trunk
group.
Cross-VLAN trunk groups are not supported. In other
words, all members of a trunk group must be within the
same VLAN; otherwise, the trunk function cannot work.
When the trunk group is used for the inter-switch
cascading, make sure the cascading port used for
connecting with the other switch is set to the same trunk
group.
Never connect two trunk groups of a switch together or
cascade two switches through two groups of trunk
channels, because such operations result in a network
loop. This situation could cause a broadcast storm or
even a breakdown in the entire network.
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