[CentOS] Lingering dhclient issue
mailing-lists at hughesjr.com
Wed Sep 13 21:07:38 UTC 2006
On Wed, 2006-09-13 at 14:06 -0400, Alfred von Campe wrote:
> I recently reconfigured some CentOS 4.3 systems that were using DHCP
> to use static IP addresses. At the same time, the systems were moved
> to a new VLAN. Here is the approximate sequence of events that took
> 1. ifdown eth0
> 2. edit /etc/sysconfig/network-scripts/ifcfg-eth0 with static IP
> 3. wait for network folks to reconfigure switch
> 4. ifup eth0
> I may have reversed steps 1 and 2 on some of the systems.
> The problem was that the dhclient process didn't go away, and kept
> renewing the old lease. Our DHCP server is configured to contact the
> DNS server and update the entry for each host it serves. So the DNS
> entries for these systems were pointing to the old address in the old
> VLAN. The eth0 interface itself just kept the static IP address for
> which it was configured. It took me a while to figure out what was
> going on.
> My question is, what could I have done to avoid this (other than
> killing the dhclient process)? Is there a better way to reconfigure
> an interface to use a static address? I am not interested in
> solutions that involve using a GUI (i.e., only command line solutions).
service network restart
(or: /etc/init.d/network restart)
Not necessarily better, but it should make the dhcp process go away (if
the ifcfg file is correctly edited).
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