chapter 8 ccna 3

chapter 8 ccna 3.16.1.1 Saving the Configuration FileChapter 10 describes how to save the configuration in RAM to NVRAM using the command copy running-config start knock-config. o When you execute this command, the file with the same name in NVRAM (startup-config by default) is overwritten; to keep both the old version and the new version in NVRAM, you need to specify a different to keep both the old and new versions in NVRAM, you need to specify different file names. Note that the command copy has two arguments, the first specifying the location of the source information (where to copy from) and the second specifying the destination (where to copy to) to copy the running and startup configurations to flash memory, as follows.IOS# copy running-config flash:file_nameIOS# copy startup-configflash: file_nameThis allows you to store multiple configuration files locally on the IOS device, but the IOS device loads the configuration from the startup configuration file in NVRAM by default when it boots.Practical experience usually does not copy the configuration file to flash, and the configuration file is not backed up to flash during the exam. However, in cases where FTP and TFTP servers are not available and you do not want to copy the configuration to the Windows Notepad application, I usually also back up the configuration to an external server, which requires you to install the server software on the server or PC and configure the IP properly on the IOS device to be able to access the server. The syntax for backing up the configuration to an external server on an IOS device is similar to the following. IOS# copy running-config URL_location For example, to back up the configuration file to a TFTP server" you can execute a command similar to the following.Chapter 16 Managing IOS Devices 389IOS# copy running-config tftp://192.168.1.10/mybackupfile.txtThe configuration is backed up to an ASCII text file. If you specify only the protocol information, but not the full URL, you will be prompted for additional information, as follows.IOS# copy running-config tftp Address or name of remote host []? 192.168.1.10 Destination filename [router-confg]? mybackupfile.cfg