用bind9做轮询时碰到的问题

options {
        directory "/var/named";
        /*
         * If there is a firewall between you and nameservers you want
         * to talk to, you might need to uncomment the query-source
         * directive below.  Previous versions of BIND always asked
         * questions using port 53, but BIND 8.1 uses an unprivileged
         * port by default.
         */
        // query-source address * port 53;
       statistics-file "/tmp/named.stats";
        allow-transfer { 172.16.30.11; };
        notify yes;
};
logging {
              channel query_log {
                      file "/var/log/query.log"        versions 3 size 20m;
                      severity        info;
                      print-time        yes;
                      print-category  yes;
              };
              category queries {
                      query_log;
              };
      };
//
// a caching only nameserver config
//
controls {
        inet 127.0.0.1 allow { localhost; } keys { rndckey; };
};
zone "." IN {
        type hint;
        file "named.ca";
};

zone "localhost" IN {
        type master;
        file "localhost.zone";
        allow-update { none; };
};

zone "0.0.127.in-addr.arpa" IN { TAG标签 : 问题 碰到 IN 1D file to type zone PTR master dns.nj365.com.