Can anybody please show me an example on how to use "exportfs -b"

[netappmagic]

I read man page many times, but still not so sure how to and in what situations I should use "exportfs -b".

Thanks a lot!

[MOHIT_FUJITSU]

Though never used, found this link:

https://library.netapp.com/ecmdocs/ECMP1196993/html/GUID-1FE0D118-231B-4BBA-8E56-7F248B9CD2DF.html