~/temp$ mkdir dir1

~/temp$ mkdir dir2

~/temp$ mkdir dir2/dir21

~/temp$ ln -s dir2/dir21 dir1/ln2dir21

~/temp$ mkdir dir1/ln2dir21/dir3

mkdir: cannot create directory ‘dir1/ln2dir21/dir3’: No such file or directory

What does the following command:

~/temp$ ln -s dir2/dir21 dir1/ln2dir21

create (there are no errors for the ln command)? The created link dir1/ln2dir21 is red and it's type is lrwxrwxrwx which seems to be a link. Then why can't create directory through that symbolic link?