Mirror VIPs from device to device

I've been doing this same thing recently. Been working on some PowerShell scripts to do a lot of the legwork for me, but haven't finished yet...

So far, the easiest way I've found to accomplish this is by using the iRule Editor and grabbing the current config file from both environments, and pulling out the pieces I need (e.g. a specific or multiple virtuals, along with known dependencies that may not exist or be up to date in the DR site). If I don't need all of that, I'll just run tmsh list from putty to get most (if not all) the config data as well.

Then I'll use WinScp to connect to the DR site and create a new file I'll use as the merge config file, and paste the code for the/those virtual(s) in there (and making the necessary modification to them, like ip addresses and what not, and being sure to put the dependencies above the rest).

Then through putty in that folder i run the verify merge command tmsh load sys config verify merge file

If it gives me an error because it couldn't find something, I'll go and grab that from the full config file and add it to the merge doc...

Only think I've had problems with are things that need actual files (e.g. the actual ssl certificates, a bit of APM stuff), which can be added through the GUI.

Once the verify runs without error, I run the merge command Kevin mentioned tmsh load sys config merge file

Hope this helps.