1, each mode (mode to be noted that each configuration is currently located):
User EXEC mode Router>
privileged EXEC mode Router #
Global configuration mode Router (config) #
Other configuration mode Router (config-mode) #
2, when you connect to the router discovery, discovery could not find the corresponding interface, then add the appropriate module to give the router. (First off and then add modules to boot)
3, the simulator delay achieve, by fast forward time acceleration multiple clicks Switch Router and perform its function;
4, the same kind of device cross-line (i.e. dotted line), may be needed to connect different devices.
5, the following simple common sense to talk about some of the configuration commands:
5.1 Command too long knocked up trouble? You can use auto-complete the Tab key , the command is to forget what he may press the Tab key twice , or press " ? " To remind myself (this is key very easy oh)
Switch(config-if)#switchport mode
Switch(config-if)#switchport mode ?
access Set trunking mode to ACCESS unconditionally
dynamic Set trunking mode to dynamically negotiate access or trunk mode
trunk Set trunking mode to TRUNK unconditionally
Switch(config-if)#switchport mode
5.2 可以敲命令缩写，这个也很方便哦，比如下面就是Switch(config-if)#switchport mode trunk的缩写，诸如此类大家多试试就OK了。
Switch(config-if)#sw mo t
5.3 有些命令反复敲很麻烦？可以通过上下键翻找命令
也可以通过一个命令“show history”查看历史命令
Switch#show history
en
conf t
show history
5.4 有时候在其他模式下查看配置时必须退到特权模式才能查看。
其实没有必要，可以再命令前添加do强制查看，这个也很方便哦。
5.5 CTRL +C 和CTRL+Z 快速退到特权模式。还有一个CTRL+shift+F6强制退出。
