Dhclient makes system unresponsive with very short leases

David W. Hankins David_Hankins at isc.org
Tue May 12 15:49:28 UTC 2009

On Wed, May 06, 2009 at 04:02:44PM +0200, Simon Matter wrote:
> However the issue seems to exist with all ISC dhcp version which is why I
> post here as well. This is what I posted to RedHat's bugzilla. The patch I
> used to fix it for me is also attached there

The patch appears to enforce a 60 second minimum lease time, which is
not described in any IETF RFC.  I suspect imposing one would be met
with some resistance.

This is purely a data problem, /var filling up is not a symptom of a
deeper problem, it is the whole problem; if the client is instructed
to observe a 2-second lease expiration, it should renew in 1 second,
and it is only the bulk of data recorded that causes an issue.

David W. Hankins	"If you don't do it right the first time,
Software Engineer		     you'll just have to do it again."
Internet Systems Consortium, Inc.		-- Jack T. Hankins
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