(啓用生成樹rstp，將二層設爲根交換機
評分：ruijie#sh spanning-tree)
二層&三層：int fa0/3
sw mode tr
exit
spanning-tree
spanning-tree mode rstp
exit
二層：spanning-tree priority 4096
exit
sh spanning-tree(root cost:18000 rootport)
三層：int fa0/3
spanning-tree cost 1800
exit
sh spanning-tree (root cost:180000 rootport)
4：創建四個vlan(評分：ruijie#sh vlan)
Ruijie(config)#vlan 11
Ruijie(config)#int f0/11
Ruijie(config-FastEthernet 0/11)#switchport mode access
Ruijie(config-FastEthernet 0/11)#switchport access vlan 11
Ruijie(config-FastEthernet 0/11)#exit
Ruijie(config)#sh vlan
5:vlan33的數據包不打標籤，vlan44的數據包無法通過交換機的鏈路
int agg 1
sw trunk native vlan33
sw trunk allowed vlan remove 44