Switch(config)#interface range fa0/1 - 6, fa0/8, fa0/10 - 12switch trunk allow vlan allswitch trunk allow vlan 2,3,4 vlan add 7,8,9show inter trunkswitchport trunk encapsulation dot1q/ISLshow running-config inter fa0/1trunk o port k co vlanSwitch(config)#interSwitch(config)#interface fa0/1Switch(config-if)#swiSwitch(config-if)#switchport trunkSwitch(config-if)#switchport trunk alloSwitch(config-if)#switchport trunk allowed vlan 2Switch(config-if)#switchport trunk allowed vlan add ? VLAN ID of a allowed VLAN when this port is in trunking modeSwitch(config-if)#switchport trunk allowed vlan add 3?sw(config)# vtp domain abc mode server/client password abcVTP Version : 2Configuration Revision : 0Maximum VLANs supported locally : 255Number of existing VLANs : 8VTP Operating Mode : ServerVTP Domain Name : abcVTP Pruning Mode : DisabledVTP V2 Mode : DisabledVTP Traps Generation : DisabledMD5 digest : 0x4D 0x1B 0x0B 0xEA 0x43 0x27 0x1D 0xF3 Configuration last modified by 0.0.0.0 at 3-1-93 00:08:36etherchannel ap dung cho cac port giong nhau