lease length

Jeff Haran jharan at Brocade.COM
Thu Feb 4 01:56:32 UTC 2010

> -----Original Message-----
> From: at 
> [ at] 
> On Behalf Of David W. Hankins
> Sent: Wednesday, February 03, 2010 3:33 PM
> To: Users of ISC DHCP
> Subject: Re: lease length
> On Wed, Feb 03, 2010 at 10:35:39AM -0800, Jeff Haran wrote:
> > Also, the all 1s lease time => infinity seems to be an IPv6 
> only thing. I couldn't find a reference in the IPv4 DHCP RFCs 
> to any special meaning for a lease time == 0xffffffff, though 
> curiously if you look at the source code to some of the 
> popular clients (e.g. dhcpcd), they seem to think that there is.
> RFC 2131, section 3.3, first paragraph.
> -- 
> 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

Aha! I stand corrected. I was looking in the wrong RFC.

I reported this same issue to this email list over a year ago:

I had assumed from the responses that infinite lease times were not an option according to the protocol, but it now seems that they are.

So my question in the original post from 2008 remains.

How does one configure dhcpd to offer infinite leases?


Jeff Haran
Brocade Communications

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