Cisco Archive Config (Automatic Backup Config)

Cisco IOS Software by default doesn't enable archive config feature. What is for this feature ? It's very usefull to always save config whenever you modify. I can say it's automatic backup config when modify happen. What is trigger configuration is change in IOS software ? Saving (write memory). Every time 'write memory' is execute, IOS will be copy configuration from running-config to startup-config. We use that trigger to backup configuration to another file every time 'write memory' is execute.

# Enable archive #

IOS#show archive 
 Archive feature not enabled

IOS(config)#
archive
 path disk0:/
 write-memory

IOS#show archive 
There are currently 1 archive configurations saved.
The next archive file will be named disk0:/-1
 Archive #  Name
   0        
   1        
   2        
   3        
   4        
   5        
   6        
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   9        
   10        
   11        
   12        
   13        
   14        

# Make manual archive or backup running-config #

IOS#archive config 

IOS#show archive 
There are currently 2 archive configurations saved.
The next archive file will be named disk0:/-2
 Archive #  Name
   0        
   1       disk0:/-1 <- font="" most="" recent="">
   2        
   3        
   4        
   5        
   6        
   7        
   8        
   9        
   10        
   11        
   12        
   13        
   14        

# Automatic make archive (backup) when write memory #

IOS#write memory 
Building configuration...
[OK]

IOS#show archive 
There are currently 3 archive configurations saved.
The next archive file will be named disk0:/-3
 Archive #  Name
   0        
   1       disk0:/-1 
   2       disk0:/-2 <- font="" most="" recent="">
   3        
   4        
   5        
   6        
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   8        
   9        
   10        
   11        
   12        
   13        
   14        

Why are we need to archive config ? 
We can rollback configuration from archive anytime, copy archive config to running-config even archive config save 14 configuration.

Have fun, I hope it usefull.