[Bug 190359] Re: dhclient continually seeks ip address on unconnected interface

[Joe Butler]

I think I have the same issue on 14.04 Server, at least it appears to be
the same issue.  No network-manager.

If the server is configured for DHCP and you later change it to static,
the dhcp client daemon still goes out and requests a DHCP address.

This impacts DNS for the device.  The static IP remains on the
interface, but the DNS record changes making it unreachable via
hostname.

The work around that I found, other than killing the dhclient process, is deleting the dhcp client database and rebooting.
rm /var/lib/dhcp/dhclient.*

You could probably just kill the related interface files if you wanted
to.

Based on the way this is behaving, I suspect its the same issue as not
having the interface active.

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https://bugs.launchpad.net/bugs/190359

Title:
  dhclient continually seeks ip address on unconnected interface

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