BIND 9.1.3 and zone transfer

Hi,

I have two DNS BIND 9.1.3 running on Solaris 8 as Master servers. Now I

installed the third DNS Server on Solaris 8 (BIND 9.1.3) and setup as a

Slave to both master DNS. However If I change the Zone file on master
and increment the SOA no it doesn't propagate to Slave DNS but if I
stop/start named (restart named) it does. Is there a configuration by
which it does transfer Zone automatically after updating the SOA serial

no? Also does dynamic update (allow-update tag) will help? I have TTL
to
1 Day. Am I missing anything here?

Here is my sample named.conf file...




Master:

options {

directory "/var/named";

pid-file "/etc/named.pid";

allow-query { any; };

allow-transfer {xx.xx.xx.xx ; }; //Slave DNS IP

notify yes;




zone "example.com" {

type master;

file "master/internal/example.com";




Slave:

options {

directory "/var/named";

pid-file "/etc/named.pid";

allow-query { any; };




zone "example.com" {

type slave;

file "slave/internal/example.com";

masters { xx.xx.xx.xx; }; // Master DNS IP




Any help/pointer will be greatly appreciated.

TIA

B