Allied Telesis AT-S100 - Manual (Page 42)

Chapter 2: Configuring the AT-S100 Software
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Adding Tagged Ports to a VLAN
To add tagged ports to a VLAN, you must specify a VLAN that you have
created already. You must specify a port in the Interface mode. The syntax
of this command is:
switchport trunk allowed vlan add|remove VLANID
The following commands add VLAN 6, to the member set of port 12:
switch#configure terminal
switch(config)#interface ge12
switch(config-if)#switchport mode trunk
switch(config-if)#switchport trunk allowed vlan add 6
For more information about this command, see “SWITCHPORT TRUNK
ALLOWED VLAN” on page 190.