<div>
check if port 53 / tcp is open if you have a firewall in between. It could be that NS1 is not allowing NS2 to do zone transfers. Which platform are you using?
</div>


<div>
<div class="content wysiwyg-content">
i have 2 DNS forwarders named respectively NS1 and NS2. &nbsp;NS2 is not able to reload the zone from NS1. &nbsp;
</div>
</div>


i have 2 DNS forwarders named respectively NS1 and NS2.  NS2 is not able to reload the zone from NS1.  

check if port 53 / tcp is open if you have a firewall in between. It could be that NS1 is not allowing NS2 to do zone transfers. Which platform are you using?

DNS server not updating

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.