Allied Telesis AT-9000 Series - Deleting Vlans

Chapter 53: MAC Address-based VLANs
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Deleting VLANs
To delete MAC address-based VLANs from the switch, use the NO VLAN
command in the VLAN Configuration mode. You can delete only one
VLAN at a time. Here is the format of the command:
no vlan vid
This example deletes the VLAN with the VID 23:
awplus> enable
awplus# configure terminal
awplus(config)# vlan database
awplus(config-vlan)# no vlan 23