Wildly excessive DHCPREQUESTs

Frank Bulk frnkblk at iname.com
Tue Feb 19 22:22:42 UTC 2008

We've seen this with D-Link routers.  Have you looked at the OUI of them to
see if there is a pattern?


-----Original Message-----
From: dhcp-users-bounce at isc.org [mailto:dhcp-users-bounce at isc.org] On Behalf
Of John Hascall
Sent: Tuesday, February 19, 2008 4:13 PM
To: dhcp-users at isc.org
Subject: Wildly excessive DHCPREQUESTs

We have a number of machines here which are making a stupidly
high number of DHCPREQUESTS (and DISCOVERS in some cases).

For example, we have a few dozen machines making in excess of
1000 REQUESTs per day.   The worst seems to be an XP box making
about 11,000/day.  Does anyone have any idea what might make a
box do a DHCPREQUEST/ACK cycle about every five seconds all day,
day after day (despite getting a 4 day lease)?


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