OpenSolaris and Solaris 11 use Apple’s Open-Source Bonjour server mdnsd rather than the Avahi daemon more common  in the Linux world. Unfortunately the OpenSolaris folks never got around to advertising NFS via mdnsd.

obinur ~>dns-sd -R obinur _nfs._tcp. . 2049 path=/export/home/majid
Registering Service obinur._nfs._tcp. port 2049
 path=/export/home/majid
Got a reply for obinur._nfs._tcp.local.: Name now registered and active