在Cisco交換機裏面有一個非常有用的命令，開始剛學習的時候不知道，走了不少彎路。這個命令可以用一次改變多個端口的設置。換句話說，如果你需要在交換機的許多個端口上進行相同的操作，不需要一個一個端口的設置，只需要一個命令就可以了。這個命令就是“range”，例如下：
S1(config)#interface range fastEthernet 0/1-24
S1(config-if-range)#no shutdown
//注意：從這兒開始是交換機改變設置時自動顯示的端口變化情況
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up
%LINK-5-CHANGED: Interface FastEthernet0/2, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up
%LINK-5-CHANGED: Interface FastEthernet0/3, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to up
%LINK-5-CHANGED: Interface FastEthernet0/4, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/5, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/6, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/7, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/8, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/9, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/10, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/11, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/12, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/13, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/14, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/15, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/16, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/17, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/18, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/19, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/20, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/21, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/22, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/23, changed state to down
%LINK-5-CHANGED: Interface FastEthernet0/24, changed state to down
S1(config-if-range)#
還可以用show running...驗證下，很好玩。