Is there any way to take backup just for the Virtual servers because we are trying to restore from 1600 series to 5050 series

Hi,

use the following command to list virtual server configuration:

tmsh list ltm virtual one-line

copy the output use and the following command to import it on the new hardware:

tmsh load sys config merge from-terminal

paste followed by CTRL-D

you can do the same with pools (and every part of configuration):

tmsh list ltm pool one-line