nfs cross mount

how can I do nfs cross mount between two servers' nfs filesystems?
should I put a wrapper or do I have to use /etc/rmtab ?
advise me which method I have to use ?

Did you read docs.hp?
Two Servers with NFS Cross-Mounts

I am still checking with little bit idea . I was looking for a simple configuration for this, but I am afraid it is not available .