Problem with devices releasing and renewing leases too frequently

[Frank Bulk - iNAME]

We have the exact same here, with just two units. =)

We're asking those customers to do a software upgrade, too.  If that doesn't
work, we'll "offer" to swap out their CPE with the Linksys gear for no cost.
If that offer is not taken, we'll communicate more clearly, if you get my
drift.

Regards,

Frank

-----Original Message-----
From: dhcp-users-bounce at isc.org [mailto:dhcp-users-bounce at isc.org] On Behalf
Of Brian Raaen
Sent: Monday, November 05, 2007 9:11 AM
To: dhcp-users at isc.org
Subject: Problem with devices releasing and renewing leases too frequently

I have a strange problem on a few cable networks that mainly involves Belkin
devices.  A cpe device with do a complete dhcp transaction
(discover/offer/request/ack) and then after it has accepted the addres it
will issue a dhcprelease and repeat the cycle.  The frequency of
dhcpreleases
is in the range of every 22 seconds for some devices.  here is a list (most
logs only span 24 hours) of the amount of releases along with the OUI's.

34252   00:17:3f:xx:xx:xx
13800   00:11:2f:xx:xx:xx
886     00:1b:24:xx:xx:xx
349     00:13:72:xx:xx:xx
349     00:0f:b0:xx:xx:xx
92      00:17:bc:xx:xx:xx
41      00:11:50:xx:xx:xx

Doing a firmware update on one router resolved this issue.  I was wondering
is
anyone else was seeing this.  We first noticed it while tailing the dhcplog
troubleshooting a different issue.  We saw a large amount of repeated
releases from the same mac address, and investigated further.

--
Brian Raaen
Network Engineer
braaen at zcorum.com
Tel 678-507-5000x5574