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

[Marc Werner]

Hi,

we had some problems with bad configured iPhones. Check if the protocol
within the network settings of the iPhone is set to DHCP or bootp. With
bootp the clients might get leases with infinite lease-time (seen on
Cisco DHCP-Servers). Perhaps these bad configured iPhones take more time
because of trying bootp while already got the DHCP-lease!?!?

Up to now we're looking for the application on the iPhones which changes
the protocol on the iPhones. Any ideas?

Cheers Marc

Am Freitag, den 11.09.2009, 13:19 -0400 schrieb Apu:
> 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,
> 
>