[c-nsp] IOS DHCP lease question

[Church, Chuck]

Noticed something a little odd on a 2650 doing DHCP, running 12.3.18:

192.168.250.3       0100.50ac.7013.a1       Apr 25 2006 03:09 AM
Automatic
192.168.250.4       0004.f203.05d7          Apr 25 2006 07:15 AM
Automatic
192.168.250.5       0100.0e08.eaf9.1f       Apr 25 2006 04:55 AM
Automatic
192.168.250.6       0100.0394.0501.23       Apr 25 2006 09:04 AM
Automatic
192.168.250.7       0014.389f.7cd0          Infinite
Automatic
192.168.250.8       0050.ac70.13a1          Apr 25 2006 03:06 AM
Automatic
192.168.251.2       0100.0cf1.a49e.f3       Apr 25 2006 09:37 AM
Automatic
192.168.251.3       0100.0f8f.b727.05       Apr 25 2006 11:43 AM
Automatic
192.168.251.4       0100.0f8f.c7a9.60       Apr 25 2006 10:05 AM
Automatic
ComCon-2650# 
 
Any idea why that one entry has a lease expiration of 'Infinite'?  It's
automatic, and I have no static mappings configured.  I see a couple
entries that have no ethernet identifier (01) in front of the MAC
address.  I'm assuming they might be BOOTP clients.  But they do have
valid lease times.  Just doing a little more research before I hit
'send', I think I found the answer. It looks like a DHCPDISCOVER message
can contain a request for an infinite lease.  Is it possible for the IOS
DHCP server to override this, and force this client to renew like
everyone else?  The clients are a mix of Windows workstations, and
Polycom and Sipura SIP devices.  All these subnets are connected to this
router.

Thanks, 
 
Chuck Church
Network Engineer
CCIE #8776, MCNE, MCSE
Netco Government Services
Enterprise Network Engineering
Home Office - 864-335-9473 
Cell - 864-266-3978
cchurch at netcogov.com