cisco switch + firewall configuration upgrade

Hi experts,

I need to cope configuration from one switch/firewall to another switch/firewall.
I have copied running configs.

The question is do I have to clear the existing configuration on the dest. devices
Or can I copy it(replace) directly without clearing previous config ?

If clearing is needed how shall I do it?

PS : destination devices already contain configuration

Thanks

Are you setting up another route, or just a backup device/host?

You can overwrite the startup config and reboot the device. If you are doing your work remotely that is the only safe way. The config will not become active until you reboot. copy tftp start should work.