DHCP Keeps Stopping Unexpectedly.

[Diego, Emil]

Hello all,

I am having an unusual problem with my DHCP server that I haven't been
able to figure out.  I have a network of about 450 computers.  95% of
those machines are using dynamic ip addresses from the dhcp server and
the other 5% are getting static ip.

I am running Fedora Core 2 and dhcp-3.0.1rc14-1.  We are using NAT on
our network so all the dynamic ip's are in 2 large pools, 10.39.6.11-240
and 10.39.7.11-240.

Everything will be working fine untill all of a sudden the dhcp server
stope granting leases.  The log file stops recording any activity from
the dhcp server and the clients computers all start to loose their ip's
as their leases start to expire.  Once the dhcp server is restarted
using "/etc/init.d/dhcpd restart" everything starts working fine again.
Any ideas on what it could be?

Here is a sample of the dchp messages right before it stops working:
Nov 19 16:12:25 moya dhcpd: if sb402.business.edu IN A rrset doesn't
exist add sb402.business.edu 5400 IN A 10.39.7.122: refused.
Nov 19 16:12:25 moya dhcpd: DHCPREQUEST for 10.39.7.122 from
00:13:72:1c:e5:34 (sb402) via eth0
Nov 19 16:12:25 moya dhcpd: DHCPACK on 10.39.7.122 to 00:13:72:1c:e5:34
(sb402) via eth0
Nov 19 16:12:26 moya dhcpd: DHCPINFORM from 10.39.7.151 via eth0
Nov 19 16:12:26 moya dhcpd: DHCPACK to 10.39.7.151
Nov 19 16:12:27 moya dhcpd: DHCPINFORM from 10.39.6.170 via eth0
Nov 19 16:12:27 moya dhcpd: DHCPACK to 10.39.6.170
Nov 19 16:12:29 moya dhcpd: if EEC-337A.business.edu IN A rrset doesn't
exist add EEC-337A.business.edu 5400 IN A 10.39.6.235: refused.
Nov 19 16:12:29 moya dhcpd: DHCPREQUEST for 10.39.6.235 from
00:0d:56:8e:d7:79 (EEC-337A) via eth0
Nov 19 16:12:29 moya dhcpd: DHCPACK on 10.39.6.235 to 00:0d:56:8e:d7:79
(EEC-337A) via eth0
Nov 19 16:12:31 moya dhcpd: DHCPINFORM from 10.39.6.170 via eth0
Nov 19 16:12:31 moya dhcpd: DHCPACK to 10.39.6.170
Nov 19 16:12:31 moya dhcpd: DHCPREQUEST for 192.168.0.17 (192.168.0.1)
from 00:17:94:04:b1:b1 via eth0: wrong network.
Nov 19 16:12:31 moya dhcpd: DHCPNAK on 192.168.0.17 to 00:17:94:04:b1:b1
via eth0
Nov 19 16:12:35 moya dhcpd: DHCPREQUEST for 192.168.0.17 (192.168.0.1)
from 00:17:94:04:b1:b1 via eth0: wrong network.
Nov 19 16:12:35 moya dhcpd: DHCPNAK on 192.168.0.17 to 00:17:94:04:b1:b1
via eth0
Nov 19 16:12:37 moya dhcpd: if ZIFFC.business.edu IN A rrset doesn't
exist add ZIFFC.business.edu 5400 IN A 10.39.6.85: refused.
Nov 19 16:12:37 moya dhcpd: DHCPREQUEST for 10.39.6.85 from
00:12:3f:40:ae:0c (ZIFFC) via eth0
Nov 19 16:12:37 moya dhcpd: DHCPACK on 10.39.6.85 to 00:12:3f:40:ae:0c
(ZIFFC) via eth0


After that last entry it just stops untill the service is restarted the
next morning:
Nov 20 07:48:32 moya dhcpd: Internet Systems Consortium DHCP Server
V3.0.1rc14
Nov 20 07:48:32 moya dhcpd: Copyright 2004 Internet Systems Consortium.
Nov 20 07:48:32 moya dhcpd: All rights reserved.
Nov 20 07:48:32 moya dhcpd: For info, please visit
http://www.isc.org/sw/dhcp/
Nov 20 07:48:32 moya dhcpd: dhcpd shutdown succeeded
Nov 20 07:48:32 moya dhcpd: Internet Systems Consortium DHCP Server
V3.0.1rc14
Nov 20 07:48:32 moya dhcpd: Copyright 2004 Internet Systems Consortium.
Nov 20 07:48:32 moya dhcpd: All rights reserved.
Nov 20 07:48:32 moya dhcpd: For info, please visit
http://www.isc.org/sw/dhcp/
Nov 20 07:48:32 moya dhcpd: Internet Systems Consortium DHCP Server
V3.0.1rc14
Nov 20 07:48:32 moya dhcpd: Copyright 2004 Internet Systems Consortium.
Nov 20 07:48:32 moya dhcpd: All rights reserved.
Nov 20 07:48:32 moya dhcpd: For info, please visit
http://www.isc.org/sw/dhcp/
Nov 20 07:48:32 moya dhcpd: Wrote 0 deleted host decls to leases file.
Nov 20 07:48:32 moya dhcpd: Wrote 0 new dynamic host decls to leases
file.
Nov 20 07:48:32 moya dhcpd: Wrote 0 deleted host decls to leases file.
Nov 20 07:48:32 moya dhcpd: Wrote 0 new dynamic host decls to leases
file.
Nov 20 07:48:32 moya dhcpd: Wrote 380 leases to leases file.
Nov 20 07:48:32 moya dhcpd: Wrote 380 leases to leases file.
Nov 20 07:48:32 moya dhcpd: Listening on LPF/eth0/00:04:23:ad:fa:d4/SBA
Nov 20 07:48:32 moya dhcpd: Sending on   LPF/eth0/00:04:23:ad:fa:d4/SBA
Nov 20 07:48:32 moya dhcpd: Sending on   Socket/fallback/fallback-net
Nov 20 07:48:32 moya dhcpd: Listening on LPF/eth0/00:04:23:ad:fa:d4/SBA
Nov 20 07:48:32 moya dhcpd: Sending on   LPF/eth0/00:04:23:ad:fa:d4/SBA
Nov 20 07:48:32 moya dhcpd: Sending on   Socket/fallback/fallback-net
Nov 20 07:48:32 moya dhcpd: dhcpd startup succeeded
Nov 20 07:48:32 moya dhcpd: DHCPDISCOVER from 00:13:72:1c:e5:90 via eth0
Nov 20 07:48:32 moya dhcpd: DHCPOFFER on 10.39.0.49 to 00:13:72:1c:e5:90
via eth0
Nov 20 07:48:32 moya dhcpd: DHCPDISCOVER from 00:11:43:ac:e7:51 via eth0
Nov 20 07:48:32 moya dhcpd: DHCPDISCOVER from 00:13:72:1c:2b:fd via eth0
Nov 20 07:48:32 moya dhcpd: DHCPOFFER on 10.39.0.43 to 00:13:72:1c:2b:fd
via eth0


I can provide more information on the log files or the configuration
file if needed, please let me know.  Thanks in advance for the help.

Emil