SW1
Switch>en Switch#conf t Enter configuration commands, one per line. End with CNTL/Z. Switch(config)#hostname SW1 SW1(config)#no ip domain-lo SW1(config)#line console 0 SW1(config-line)#exec-timeout 00 SW1(config-line)#exit SW1(config)#vlan 2 SW1(config-vlan)#name caiwu SW1(config-vlan)#vlan 3 SW1(config-vlan)#name it SW1(config-vlan)#exit SW1(config)#interface range fastEthernet 0/1-2 SW1(config-if-range)#switchport mode access SW1(config-if-range)#switchport access vlan 2 SW1(config-if-range)#exit SW1(config)#interface range fa0/3-5 SW1(config-if-range)#switchport mode access SW1(config-if-range)#switchport access vlan 3 SW1(config-if-range)#end SW1# %SYS-5-CONFIG_I: Configured from console by console SW1#show vlan b SW1#show vlan brief VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1 default active Fa0/6, Fa0/7, Fa0/8, Fa0/9 Fa0/10, Fa0/11, Fa0/12, Fa0/13 Fa0/14, Fa0/15, Fa0/16, Fa0/17 Fa0/18, Fa0/19, Fa0/20, Fa0/21 Fa0/22, Fa0/23, Fa0/24, Gig0/1 Gig0/2 2 caiwu active Fa0/1, Fa0/2 3 it active Fa0/3, Fa0/4, Fa0/5 1002 fddi-default active 1003 token-ring-default active 1004 fddinet-default active 1005 trnet-default active SW1#conf t Enter configuration commands, one per line. End with CNTL/Z. SW1(config)#interface gigabitEthernet 0/1 SW1(config-if)#switchport mode trunk SW1(config-if)#end SW1# #修改native VLAN为VLAN 90 Switch(config)#interface gigabitEthernet 0/1 SW1(config-if)#switchport trunk native vlan 90 SW1(config-if)# %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet0/1 (1), with Switch GigabitEthernet0/1 (90). SW1(config-if)
SW2
Switch>en Switch#conf t Enter configuration commands, one per line. End with CNTL/Z. Switch(config)#no ip domain-lo Switch(config)#line console 0 Switch(config-line)#logging synchronous Switch(config-line)#exec-timeout 00 Switch(config-line)#exit Switch(config)#vlan 2 Switch(config-vlan)#name caiwu Switch(config-vlan)#vlan 3 Switch(config-vlan)#name it Switch(config-vlan)#exit Switch(config)#interface fa0/1 Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan 2 Switch(config-if)#int fa0/2 Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan 3 Switch(config-if)#end Switch# %SYS-5-CONFIG_I: Configured from console by console Switch#show vlan brief VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1 default active Fa0/3, Fa0/4, Fa0/5, Fa0/6 Fa0/7, Fa0/8, Fa0/9, Fa0/10 Fa0/11, Fa0/12, Fa0/13, Fa0/14 Fa0/15, Fa0/16, Fa0/17, Fa0/18 Fa0/19, Fa0/20, Fa0/21, Fa0/22 Fa0/23, Fa0/24, Gig0/1, Gig0/2 2 caiwu active Fa0/1 3 it active Fa0/2 1002 fddi-default active 1003 token-ring-default active 1004 fddinet-default active 1005 trnet-default active Switch# %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to down %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up Switch#conf t Enter configuration commands, one per line. End with CNTL/Z. Switch(config)#interface gigabitEthernet 0/1 Switch(config-if)#switchport mode trunk Switch(config-if)#end Switch#conf t Enter configuration commands, one per line. End with CNTL/Z. #在trunk上移除VLAN3的流量，使得SW1、SW2的VLAN3之间不能够通信 Switch(config)#interface gigabitEthernet 0/1 Switch(config-if)#switchport trunk allowed vlan remove 3 #在trunk上允许VLAN3的流量，使得SW1、SW2的VLAN3之间能够通信 Switch(config-if)#switchport trunk allowed vlan add 3 #修改native VLAN为VLAN 90 Switch(config)#interface gigabitEthernet 0/1 Switch(config-if)#switchport trunk native vlan 90 Switch#show interfaces trunk Port Mode Encapsulation Status Native vlan Gig0/1 on 802.1q trunking 90 Port Vlans allowed on trunk Gig0/1 1-1005 Port Vlans allowed and active in management domain Gig0/1 1,2,3 Port Vlans in spanning tree forwarding state and not pruned Gig0/1 1,2,3