Normal, extended VLAN, voice VLAN

Implementing Cisco IP Switched Networks (300-115)
Normal VLAN:
Normal VLANs range are VLANs 1-1005. Normal range VLANS can be configured in both database configuration mode and global configuration mode and are stored in vlan.dat file in Flash memory. VTP versions 1 and 2 can advertise normal range VLANs only.
Extended VLANs:
Extended VLANs are VLANs that fall in the range 1006 to 4094. They are mainly used in service provider networks to allow for the provisioning of large numbers of customers. Extended VLANs differ from normal VLANs because they have higher numbers. Extended VLANs must be configured in VTP transparent mode. Extended VLANs are saved to the running-config.
Voice VLAN:
A voice VLAN enables the access port to carry IP voice traffic from an IP phone. By default, the voice VLAN is disabled. When enabled, all untagged traffic is sent according to the default CoS priority of the port.
Description and Commands:
Verify VLAN database vlan.dat
SW# show flash OR dir flash
Verify VLAN creation
SW# show vlan brief OR show vlan
Check VTP mode and status
SW# show vtp status
Configure a Voice VLAN
SW(config)#vlan 5
SW(config-vlan) # name VOICE
SW(config)#interface f0/4
SW(config-if)#switchport voice vlan 5
Verify switchport Configuration
SW# show interface f0/4 switchport .