Allied Telesis AT-GS950/24 User Manual page 150

Chapter 10: Static Port Trunking
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more than one VLAN.
The ports of a static trunk can be either untagged or untagged

members of the same VLAN.
The switch selects a port in the trunk to handle broadcast packets and
packets of unknown destination. The switch makes this choice based on a
hash algorithm, depending upon the source and destination MAC
addresses.