VLAN technologies

Standard VLANs range is from 1 to 1005

• Vlan Range is 0 - 4095. 0 and 4095 are reserved for system use, so we have Vlans from 1 to 4094.
• Vlan from 1002 to 1005 (fddi and token-ring) are not used.
• Standard configurable vlan range is from 2 to 1001
• Extended configurable vlan range is from 1006 to 4094
• Extended vlans are not saved in vlan.dat
• VTP has 3 version and all tree support the normal and extended rang
• If you are running TVP in transparent mode, the vlans will be stored in the running configuration. Normally, only extended vlans would be in the running configuration.

• Trunk ports (802.1Q)
• DTP
• DTP can be configured to dynamic or auto
• Dynamic configuration (switchport mode dynamic auto)
• Only send or it will respond to DTP request.
• Auto configuration (switchport mode dynamic desirable)
• Send and accept DTP
• Two interfaces in dynamic auto will became access port.
• One interface in auto and another in desirable, the link will become trunk.
• Two interfaces in desirable will become trunk.
• Trunk and an auto - Trunk
• DTP can be disabled by issuing switchport nonegotiate under the interface.
• DTP and CDP run on vlan 1.

• Voice Vlan.
• Voice vlans are also known as Auxiliary vlans.

    Configuration

interface GigabitEthernet1/2
 switchport access vlan 60
 switchport voice vlan 50
 negotiation auto

sho vl bri | in 50|60|Sta
VLAN Name                             Status    Ports
50   VLAN0050                         active    Gi1/2
60   VLAN0060                         active    Gi1/2