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Date:      Thu, 05 May 2011 10:44:14 +0200
From:      Frank Bonnet <f.bonnet@esiee.fr>
To:        freebsd-questions@freebsd.org
Subject:   Problem when swapping two IP addresses machines
Message-ID:  <4DC2635E.5010506@esiee.fr>

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Hello

Yesterday I swapped the IP addresses of two machines
( new and old mail server ).

After I rebooted the two machines I was unable to join
our DNS server ( even to ping it )

I suspect the DNS was keeping the IP / MAC address mapping
of the two swapped machines , so I flushed the ARP cache but
it was still impossible to join the DNS from the concerned
machines. I have to reboot the DNS Server to be able to
ping it and use it again.

The DNS server runs FreeBSD 8.0-RELEASE-p4.

Thanks for any infos.








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