VLAN

ISL(Inter-Switch Link)跨交換器鏈路-Cisco設備專用
VTP(VLAN Trunking Protocol)VLAN主幹通訊協定

新增VLAN
S1#config t
S1(config)#vlan 20
S1(config-vlan)#Engineering

指派交換埠給vlan
S1(config)#interface fa0/0
S1(config-if)#switchport
S1(config-if)#switchport mode access
S1(config-if)#switchport access vlan  20

VLAN Trunk設定
S1(config)#interface gi0/1
S1(config-if)#switchport trunk encapsulation dot1q
S1(config-if)#switchport trunk native vlan 20
S1(config-if)#switchport trunk allowed vlan all
S1(config-if)#switchport trunk mode dynamic desirable

檢視trunk狀態
S1#show interface fa0/1 trunk
S1#show interface status
S1#show vlan id 20
S1#show interface fa0/1 switchport
S1#show interface fa0/1 trunk

檢視vtp組態
S1#show vtp status

設定vtp管理領域
S1(config)#vtp domain Jason

設定vtp模式
S1(config)#vtp mode server
S1(config)#vtp password 12345

設定vtp版本
S1(config)#vtp vsesion 2

啟用vtp修剪
S1(config)#vtp pruning