Allied Telesis management software layer 2+ fast ethernet switches manual

Chapter 28: VLANs and Multiple VLAN Commands

This command has two syntaxes. You can use either command to add ports to a VLAN. The difference between the two is that Syntax 1 can add only one type of port, tagged or untagged, at a time to a VLAN, while Syntax 2 can add both in the same command. This is illustrated in Examples below.

When you add untagged ports to a VLAN, the ports are automatically removed from their current untagged VLAN assignment. This is because a port can be an untagged member of only one VLAN at a time. For example, if you add Port 4 as an untagged port to a VLAN, the port is automatically removed from whichever VLAN it is currently an untagged member.

Adding a tagged port to a VLAN does not change the port’s current tagged and untagged VLAN assignments. This is because a tagged port can belong to more than one VLAN at a time. For instance, if you add Port 6 as an tagged port to a new VLAN, Port 6 remains a tagged and untagged member of its other VLAN assignments.

Examples

The following command uses Syntax 1 to add ports 4 and 7 as untagged members to a VLAN called Sales:

add vlan=sales port=4,7 frame=untagged

The following command does the same thing using Syntax 2:

add vlan=sales untaggedports=4,7

The following command uses Syntax 1 to add port 3 as a tagged member to a VLAN called Production:

add vlan=production port=3 frame=tagged

The following command does the same thing using Syntax 2:

add vlan=production untaggedports=3

Adding both tagged and untagged ports to a VLAN using Syntax 1 takes two commands, one command for each port type. For example, if you had a VLAN called Service and you wanted to add port 5 as a tagged port and ports 7 and 8 as untagged ports, the commands would be:

add vlan=Service port=5 frame=tagged

add vlan=Service port=7-8 frame=untagged

Using Syntax 2, you can add both types of ports with just one command:

add vlan=Service untaggedports=7-8 taggedports=5

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