Mac OS/iPhone clients won't use lease for ~90 seconds

Shawn Holland sholland at sandara.ca
Sat Sep 12 00:11:10 UTC 2009


On Fri, 2009-09-11 at 13:19 -0400, Apu wrote:
> The dhcpd.conf is at http://pastebin.com/m3053e533
> 
> The only recent change is to change our 10.12.x.x subnet to a shared
> network (10.12.x.x for known clients and 10.112.x.x for unknown
> clients).  From the dhcpd logs, I see a fairly normal "conversation"
> between server and client and it looks like the client accepts the lease
> and should start using it.
> 
> Sep 11 12:27:58 ip dhcpd: DHCPDISCOVER from 00:1e:c2:71:dc:dd via 10.12.2.2
> 
> Sep 11 12:27:59 ip dhcpd: DHCPOFFER on 10.112.101.176 to
> 00:1e:c2:71:dc:dd (Perlas-iPod) via 10.12.2.2
> 
> Sep 11 12:28:04 ip dhcpd: DHCPDISCOVER from 00:1e:c2:71:dc:dd
> (Perlas-iPod) via 10.12.2.2
> 
> Sep 11 12:28:04 ip dhcpd: DHCPOFFER on 10.112.101.176 to
> 00:1e:c2:71:dc:dd (Perlas-iPod) via 10.12.2.2
> 
> Sep 11 12:28:05 ip dhcpd: DHCPREQUEST for 10.112.101.176 (10.13.2.2)
> from 00:1e:c2:71:dc:dd (Perlas-iPod) via 10.12.2.2
> 
> Sep 11 12:28:05 ip dhcpd: DHCPACK on 10.112.101.176 to 00:1e:c2:71:dc:dd
> (Perlas-iPod) via 10.12.2.2
> 
> 
> But, unknown Mac OS X or iPhone/iPod users in this network have to wait
> about 90 seconds for their machines to actually start using the lease
> given to them.  Known systems, Windows systems, and Blackberry devices
> don't seem to have this delay.
> 
> Does anyone see something obvious I'm missing here?
> 
> Thanks in advance,
> 
> 

How long of a lease time are you offering to the iPhone. I saw the same
thing happen with my iPhone on my server while testing some dhcpd/omapi
stuff the other day.. I thought that it was due to the extremely short
lease I was offering (5 seconds), didn't think much more about it
because it hasn't been a problem for me yet. 

-- 
Regards,
Shawn Holland
Sandara Technologies Ltd.




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