Continuous DISCOVER/OFFER frnkblk at
Tue Dec 23 20:34:04 UTC 2008

That usually means the client doesn't like the OFFER.  You'll likely have to
turn on debugging on the client system to find out why.  Sometimes analyzing
a packet capture of the traffic explains.


-----Original Message-----
From: dhcp-users-bounces at
[mailto:dhcp-users-bounces at] On Behalf Of Peter Laws
Sent: Tuesday, December 23, 2008 2:03 PM
To: Users of ISC DHCP
Subject: Continuous DISCOVER/OFFER

Hate to admit being a n00b, but oh well.

Stood up a new DHCP server on RHEL 5  to replace one on W2k3.

All seems well, but I am getting continuous (or every 4, 8, 16 seconds)
DHCPDISCOVER messages from a particular client system.  The server is
sending back DHCPOFFERs, but nothing happens after that.  No lease shows up
and the client keeps asking.

Where should I start looking?  Other systems, "reserved" or otherwise, seem

Server is Redhat's hacked dhcp-3.0.5-13.el5.

Peter Laws / N5UWY
National Weather Center / Network Operations Center
University of Oklahoma Information Technology
plaws at
Feedback? Contact my director, Craig Cochell, craigc at Thank you!
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