linking DNS from multiple servers
 

I have a wide area network with 7 CentOS servers running Bind and 1 Windows 2003 server. All 8 of these servers handle DHCP and DNS at their respective locations. At each site I can ping computer.site.company I'd like to be able to resolve the dns names from site to site. So from site1 I would like to be able to ping computer.site2.company and get a response.

Can't you give the DNS addresses of all the DNS machines in all the DHCP servers ?
this way, after fall-back one of the DNS servers must be able to reply ?

soemthing like

domainname XXX
search YYY
nameserver <name server 1>
nameserver <name server 2>
...
nameserver <name server 8>

That's how I thought it should work. In /etc/resolv.conf I've got

nameserver 127.0.0.1
nameserver 10.6.200.1

The strange thing is when at site1 I do a host ip for a computer at site2 I get the reverse, but when I do host computer.site2.company I get Host computer.site2.company not found: 3(NXDOMAIN)

Maybe the DNS server in each location is configured to only allow queries from their own location?

I don't have anything limiting where the dns servers can be accessed from, and if that was the case the reverse shouldn't work either should it?