On 04/04/2012 09:18 AM, Jerry Geis wrote: > If a machine with centos 6.2 is set for DHCP and it looses power and the > switch > looses power for a long time. lets say a day. so the switch really goes > off even with batter backup. > > Now power comes on, the machine asks for a DHCP address before the > switch is read > as its not back up yet. there is no response and the machine does not > get an address. > Finally the switch comes back up , the machine has already posted that it > Network got an error as there was no DHCP server. > > Does the machine ever ask again???? or do I have to manually do a server > network restart > or reboot the machine again. > > It seems to never ask again. > > jerry > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos There is a timeout and a retry parameter in the dhcp client configuration file (whatever it is called in CentOS 6). On the non-CentOS system where I am sending the email from it is /etc/dhcp3/dhclient.conf (but probably different in CentOS 6). Look for a man page for dhclient.conf. My CentOS 6 machine is turned off right now. Nataraj