Learning by Doing: CISCO Certified Network ... - SCN Research

8. Once you have determined that your configuration is what you would like on your
router you need to save it to your startup-configuration file. Otherwise if your
router is re-booted or you loose power then your configuration will be lost.
RouterA#copy ru start (or wr)
9. Great. Now you know how to save your configuration. But what if someone else
saved a configuration and you want to get rid of it? Do this:
RouterA#erase start (to erase the startup-configuration file)
RouterA#reload
10. So what if you made a mistake when you are typing something? Some things you
can just re-type and they will be changed (like hostname) and some others you
can un-do just by typing the word “no” and repeating the errant command.
RouterA(config)#hostname mark
Mark(config)#hostname matt
Matt(config)#
matt(config)#line vty 0 4
matt(config-line)#password csico
matt(config-line)#no password csico
matt(config-line)#password cisco
(darn! We wanted “matt”)
(just type in “matt”)
(darn! We wanted “cisco”)
Supplemental Lab or Challenge Activity:
1. Don’t have a router to practice this on at home? Just practice writing out this
script over and over on paper. Don’t forget to write the prompts…they are
important to know too.
Router>en
Router#config t
Router(config)#hostname RouterA
RouterA(config)#line vty 0 4
RouterA(config-line)#password cisco
RouterA(config-line)#login
RouterA(config-line)#exit
RouterA(config)#line con 0
RouterA(config-line)#logging synchronous
RouterA(config-line)#exec-timeout 0 0
RouterA(config-line)#exit
RouterA(config)#enable secret cisco
RouterA(config)#enable password class
2. Security/Hacking Tip on VTY lines: Port scans (which are legal) on your network
can reveal ports 2000, 2001, 4000, 4001, 6000, or 6001 ports in use. These are
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