3Com SuperStack II 9300 Command Reference Manual page 405

ip interface define (3500/9000 Layer 3) 405
IP Interface Define Example (Port-based Routing)
Enter IP address: 158.101.1.1
Enter subnet mask [255.255.0.0]: 255.255.255.0
Enter interface type (vlan/port) [vlan]: port
VLAN mode must be changed to allClosed to support this
interface.
This removes all VLANs, then re-creates the Default VLAN.
continue? (n,y) [y]: y
Select bridge port (1-6|?): 1
IP Interface Define Example (VLAN-based Routing)
Enter IP address: 158.101.1.1
Enter subnet mask [255.255.0.0]: 255.255.255.0
Enter interface type (vlan/port) [vlan]:vlan
Enter VLAN interface index {3|?} [3]: 3