Page 413

Backing Up and Restoring the Cisco Configuration

367

Warning: Attempting to overwrite an NVRAM configuration

previously written by a different version of the system

image.

Overwrite the previous NVRAM configuration?

[confirm][Enter]

Building configuration...

[OK]

Now when you run show startup-config, the version shows 12.0:

Router#sh start

Using 487 out of 32762 bytes

version 12.0

Copying the Configuration to a TFTP Host

Once the file is copied to NVRAM, you can make a second backup to a
TFTP host by using the copy running-config tftp command (copy run
tftp

for short), as follows:

Router#copy run tftp

Address or name of remote host []?192.168.0.120

Destination filename [router-confg]?todd1-confg

487 bytes copied in 12.236 secs (40 bytes/sec)

Router#

Notice that this took only two exclamation points (!!), which are two UDP

acknowledgments. In this example, I named the file todd1-confg because I
had not set a hostname for the router. If you have a hostname configured, the
command will automatically use the hostname plus the extension -confg as
the name of the file.

Restoring the Cisco Router Configuration

If you have changed your router's running-config and want to restore the
configuration to the version in startup-config, the easiest way to do this is
to use the copy startup-config running-config command (copy start
run

for short). You can also use the older Cisco command, config mem,

to restore a configuration. Of course, this will work only if you first copied
running-config into NVRAM before making any changes.

www.sybex.com