I want to setup a secondary name server for a domain. What should I put in /etc/named.conf?

Here's what I have in there right now on the primary name server:

zone "anifics.com" {
type master;
file "domains/anifics.com";
};

What should I put for the secondary name server, so that it will automatically contact the primary name server to retrieve the domain information and cache it locally? I'm guessing it has something to do with "type slave"...