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DNS search order not working

we have four DNS servers.
nsnt.cissltd.com
nsnt2.cissltd.com
nsnt3.cissltd.com
nsnt4.cissltd.com

nsnt4.cissltd.com is on a separate ISP than the first three. Yesterday we shut off the nsnt2.cissltd.com and nsnt3.cissltd.com servers to rebuild a failed raid array. when the servers were off our DNS lookups failed and all of web hosting services were unavailable. Not good. Can anyone provide an answer as to why our DNS search order isn't working?

nsnt2.cissltd.com is the primary DNS server, the other DNS servers are all secondary.

SOLUTION

NT_thyrth

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CISS

ASKER

thanks for the response.

there are a bunch of entries in the "root hints" - none of them recognizable to me: a, b, c, ....m.root-servers.net all with some pretty "flakey" looking IP address....192.33.4.12 is one of them........

we don't have any forwarders defined.....should we have the other local DNS servers defined in the forwarders?

NT_thyrth

You can try that as a dirty walkaround. Till the other servers are back up again

CISS

ASKER

got the nsnt4.cissltd.com back...it was registered with network solutions as .98 and needed to be .100 ...this change has brought this service back online.

looks like the root-hints servers that are in the DNS settings we have are all owned by Network Solutions/Arin

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giltjr

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CISS

ASKER

that sounds correct.