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I have a Ubuntu server with the following in /etc/network/interfaces:

auto eth0
iface eth0 inet static
        address a.b.c.d
        netmask 255.255.255.0
        gateway a.b.c.254

When I run /etc/init.d/networking restart, it works as expected.

In the same LAN, I have a DHCP server. From time to time, Ubuntu server unexpectedly loses its static IP, and gets one from a DHCP for an unknown reason to me.

Running /etc/init.d/networking restart corrects the address to the desired one.

What is the cause of this issue, and how can I fix it?

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2 Answers

up vote 1 down vote accepted

Happend to me sometime, solved by uninstalling dhcp client. No use on server anyway.

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Oh I dunno. I use dhclient on servers sometimes. It's all fine if the DHCP server is handing out static leases. – Tom O'Connor Mar 9 '11 at 0:12
Perfectly suitable for me... No need for dhcpclient – Boban P. Mar 9 '11 at 7:54
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up vote 2 down vote

Something invoked dhclient without specifying an interface.

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