This might be the wrong place to ask, but I don’t know where to turn. My internal home network, including wireless, is controlled by a CentOS6 server, which provides dhcpd services, along with NAT. I
have DHCPD configured with the addresses 192.168.155.200 through
192.168.155.254 as the range for dynamic allocations. The default-lease time is 1800 seconds, the maximum is 3600 seconds.
My windows clients, and even an ipad-mini behave nicely, asking for DHCP renewals once ever five minutes, or at about 80% of the default lease time, a behavior I can understand. However, several of my guests, with their own iPads, I-watches, iPhones, connect to my network (via a wireless access point which does not do routing functions) and they’re renewing once every 20-30 seconds. In addition, these devices also loose connectivity for brief intervals, which seems to be roughly synchronized with dhcp renewal. This last fact I deduce by doing “tail -f /etc/log/messages” and hearing them say “lost connection” at just about the same moment the DHCPREQUEST
and DHCPACK statements show up.
It’s difficult to believe that Apple IOS devices (all of which are running apple’s latest) have a dhcp client problem not shared by windows or even linux hosts.
Does anyone have any clues?
David Kurn San Francisco
DHCPD.CONF file is excerpted below: