Definition

Trunking Protocol

Description

Has nothing to do with trunks It only works over trunk links or trunked ports

Use scenarios

If you have 50 and configure VLAN X-Y on all devices You’ll have to login on every device and configure the device

Difference between VTP v1 and v2

Only difference: V2 supports token ring VLANs

VTP has a client-server mechanisms. All you’ll have to do:

• create a VTP server
• all other hosts are clients

VTP has 3 operating modes:

• VTP Server mode
  • VLANs are stored on a device in a file called vlan.dat
  • In server mode changes to the file are allowed
  • These changes/modifications are carried down to the clients as VTP advertisements
• VTP cliet mode
  • Will listen to the changes sent by the server and apply the changes
  • Is not allowed to modify the file vlan.dat
• VTP transparent mode
  • Will relay/forward VTP advertisemnts to downstream clients
  • BUT will not apply the changes
  • IS allowed to add/delete VLANs
  • CAN modify its vlan.dat

Lab configuration

1. Make SW1 the VTP server.
2. Make SW2 and SW3 VTP transparent
3. Make SW4 to VTP client.

VTP Server mode

• Put in server mode

1

sw1 (config)# vtp mode server

By default all Cisco switches are in VTP server mode.

• Create VTP domain

1

sw1 (config)# vtp domain ccna

• Set VTP password

1

sw1 (config)# vtp password cisco

• Show VTP status

1

sw1 (config)# do show vtp status

• Use VTP version 2 (by default its version 1)

1

sw1 (config)# vtp version 2

• Show password

1

sw1 (config)# do show vtp password

Configuration revision

A count of how many changes that have been made to vlan.dat

VTP transparent mode

• Put in mode

1

sw2 (config)# vtp mode transparent

• Set VTP domain

1

sw2 (config)# vtp domain ccna

VTP Client mode

1
2
3
4

sw4 (config)# vtp domain cccna
sw4 (config)# vtp pass cisco
sw4 (config)# vtp mode client
sw4 (config)# do show vtp status