kron and backup

Today, I have looked my auto archive to see if they work properly. Surprise, all was ok except for the 3560 switch. When someone execute a 'write memory' all work fine but the schedule backup creates an empty file. There are just these four rows:

!

!

!

end

After some investigations on Internet I have discovered that I was not the first to occur this issue with these equipement. So I have decided to use another solution. It's the kron which is the equivalent of the cron on an unix machine. The configuration looks like this example:


archive
path ftp://10.10.10.10/PATH/MY-SWITCH/$h-
write-memory
no time-period 10080
! 
kron occurrence backup at 22:00 25 recurring
policy-list backup
!
kron policy-list backup
cli archive config

I have kept all the configuration of the archive except the 'time-period'. I have just added policy backup which is schedule by a kron. The policy executes the command 'archive config' and the kron starts one time par month every 25th at 10pm. Also, it's very important to have NTP server if you don't want encountered problem to execute a kron.