You can add mapping entries to the WAFL credential cache at any time. Normally, this is not necessary because entries are created automatically as the storage system is accessed.
You must have the names and IP addresses of the entries you want to add to the WAFL credential cache.
The best way to add entries is in a script that loads the WAFL credential cache with entries at boot time. This immediately puts the entries in the WAFL credential cache rather than waiting for Data ONTAP to create the entries in the course of accessing the files.