Validate a VLAN ID and generate the IOS vlan / name / exit snippet.
vlan 10 name VLAN10 exit
VLANs 1-1005 are normal range; 1002-1005 are reserved for Token Ring/FDDI. Extended VLANs 1006-4094 need VTP transparent mode.
vlan 10 → name VLAN10 → exitVLANs 1002-1005 are reserved for Token Ring and FDDI and cannot carry Ethernet.
Extended-range VLANs (1006-4094) require VTP transparent mode on the switch.