On Nov 16, 2010, at 2:10 PM, Gogan, James P wrote: > Was wondering how many other folks have run into the Android device/DHCP > issue well summarized by the Princeton folks > (http://www.net.princeton.edu/android/android-stops-renewing-lease-keeps-using-IP-address-11236.html) > and what folks were doing about this. Rather surprising that it's still > an on-going/open issue even though a case was opened on this about two months > ago. > > Quick summary for those that haven't noticed: a large number of Android > devices (both 2.1 and 2.2 firmware) don't try to renew their DHCP lease, but > keep using the address anyway. DHCP server thinks the address is available, > offers it to other clients, clients discover address is in use and send > DHCPDECLINE, lease is abandoned and so on. > > What have folks found to be the best way to deal with those devices, short of > an electromagnetic pulse?
We enable a "DHCP Required" feature on our wireless. We actually turned it on as a security measure to help prevent man-in-the-middle attacks but it also stops accepting IP traffic from a device whose DHCP lease has expired. > -- Jim Gogan > ITS Comm Tech > Univ of North Carolina at Chapel Hill > > ********** > Participation and subscription information for this EDUCAUSE Constituent > Group discussion list can be found at http://www.educause.edu/groups/. > --- Bruce Curtis bruce.cur...@ndsu.edu Certified NetAnalyst II 701-231-8527 North Dakota State University
