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Took a little while but name resolution has now come good on its own. But would be great if there was a way to expedite the process instead of waiting for it to correct itself over time. Thanks.
Caching is performed by your DNS server and web browser. Every DNS record has a TTL value defining it's time to live before it expires. As far as I understand, the Linux DNS resolver does not cache DNS records based on their TTL Value. You can enable DNS caching using the nscd daemon or dnsmasq. By default, both services are not enabled:
chkconfig --list nscd
nscd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
chkconfig --list dnsmasq
dnsmasq 0:off 1:off 2:off 3:off 4:off 5:off 6:off
If any of them are enabled, try "service restart nscd" or "service restart dnsmasq" to reset the cache.
Thanks Dude. Both nscd and dnsmasq are turned off, stock ol5u8 builds. I guess you are right that the caching was done by the windows DNS server which I suspect may have a TTL of an hour, hence it came good after about that time frame. Thanks again.