How to create config file for virual servers and ASM policies to download it and instal it on another BIG IP?

Hi

For ASM, you need to export the policy in a file, or through API REST. - POST on /mgmt/tm/asm/tasks/export-policy - GET on /mgmt/tm/asm/file-transfer/downloads All this is quite well documented here

For LTM, you can use the Single-Configuration-File as described by Kai

Yoann