[CentOS] question on DHCP

Wed Apr 4 16:18:59 UTC 2012
Jerry Geis <geisj at pagestation.com>

If a machine with centos 6.2 is set for DHCP and it looses power and the 
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.