Nslookup, timeout twice then result

Hi guys,

I have the following situation, can you please help me to resolve it.

We have multiple AD sites with multiple Domain Controllers. When I try nslookup in one psrticular site, it returns "Time Out 2 seconds" twice and then shows the result. If I change the Time Out to 10 seconds, it will show the time out twice anyway and then will show the result. And this happens only in that particluar site.

I have checked the following:

- EDNS is disabled

- PTR records ar OK

- IPv6 disabled

- No resource constrains present

Any advice?

Thanks,

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