By default, all Extreme Networks switches run in 802.1Q VLAN operational mode. All ports on all Extreme Networks switches are assigned to a default VLAN (VLAN ID 1), which is enabled to operate and assigns all ports an egress status of untagged. This means that all ports will be allowed to transmit frames from the switch without a VLAN tag in their header. Also, there are no forbidden ports (prevented from transmitting frames) configured.
You can use the CLI commands described in this document to create additional VLANs, to customize VLANs to support your organizational requirements, and to monitor VLAN configuration.