Dear all, My problem is I just setup a Sec DNS on solaris 2.6 which BIND ver. is 4.9.x, and now I want to upgrade my Pri DNS which is running on Freebsd. however, new Freebsd is include BIND 8.1.x, what if I upgrade it, Pri & Sec DNS are in different ver. of BIND. Is there any problem? Please give some idea. Thanks! Billy