> If Bind version of primary dns is "bind-libs-9.3.6-16.P1.el5" and for
> secondary dns "bind-9.5.0-29.b2.fc9.i386".
Something wrong there: "libs" vs. "server", but I assume you mean server
for both.
> Is it mandatory the same version for
> primary and secondary DNS.
Not unless you rely on a particular feature of the higher version.
-JP