That's strange then... I've never seen an official bug report for this, despite looking. I wander whether Android 2.2 miss-configures subnet masks differently, based on the DHCP information it is provided?
Many Thanks Peter Mr Peter Methven, Network Specialist Information Technology (IT) Allen McTernan Building, Edinburgh Campus Tel: 0131 451 3516 For IT support queries or requests, please email ith...@hw.ac.uk <mailto:ith...@hw.ac.uk> or phone ext 4045, with full details of your query or request and your contact details. http://www.hw.ac.uk/it From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Holland, Ryan C. Sent: 16 February 2011 15:06 To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Android and WPA2? Interesting, Peter. We were using /24s and the phone consistently used a /16 (255.255.0.0) mask. We have three class B networks on campus, so basically if the user tried to go to a third of our address space (DNS servers included), it would ARP for it and fail. ========== Ryan Holland Network Engineer, Wireless Office of the Chief Information Officer The Ohio State University 614-292-9906 holland....@osu.edu On Feb 16, 2011, at 9:59 AM, Methven, Peter J wrote: Russ/ Ryan, we found the issue that Ryan reported is an issue with all the versions of Android we have tested (but we haven't tested 2.3 yet), but I thought it was something unique to our environment and we broke our /20 wireless network subnet into multiple /24 subnets based on location to solve the issues. This has worked ok for everything apart from Apple devices... Essentially we found regardless of which mask was provided via DHCP the Android device will always use a 255.255.255.0 class c mask. So obviously if you are using a /22 or /20 mask etc. the device will function with no problems if it is lucky and is assigned an IP Address within the same class c segment as the gateway. Otherwise it will be unable to reach the gateway, and as Ryan says will send out unusual ARP traffic etc. Many Thanks Peter Mr Peter Methven, Network Specialist Information Technology (IT) Allen McTernan Building, Edinburgh Campus Tel: 0131 451 3516 For IT support queries or requests, please email ith...@hw.ac.uk <mailto:ith...@hw.ac.uk> or phone ext 4045, with full details of your query or request and your contact details. http://www.hw.ac.uk/it From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Holland, Ryan C. Sent: 16 February 2011 14:32 To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Android and WPA2? Russ, I encountered a Samsung Captivate that was using an incorrect subnet mask, i.e., ignoring the mask received in the DHCPOFFER. This resulted in the device ARPing for addresses outside of its subnet, which in turn, it did not receive responses for. The user symptom was that DHCP succeeded, but no traffic beyond that passed. If you're looking at pcaps, look for excessive or questionable ARP traffic. ========== Ryan Holland Network Engineer, Wireless Office of the Chief Information Officer The Ohio State University 614-292-9906 holland....@osu.edu On Feb 16, 2011, at 9:14 AM, Russ Leathe wrote: Aruba 5.0.3 Impulse Safeconnect We started to have a problem with all Androids on our Aruba Wireless Network. We connect, obtain an IP using WPA2. However, no data is passed. I have tickets open with both vendors, but I just wanted to reach out and ask if you have experienced this with the Android, and if there are any 'fixes'. I'm running wireshark now to see if anything stands out. Thanks Russ ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. -- BEGIN-ANTISPAM-VOTING-LINKS ------------------------------------------------------ Teach CanIt if this mail (ID 1156435022) is spam: Spam: about:blank Not spam: about:blank Forget vote: about:blank ------------------------------------------------------ END-ANTISPAM-VOTING-LINKS ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ________________________________ Spam <https://antispam.osu.edu/b.php?i=1156461852&m=5960d893a06b&c=s> Not spam <https://antispam.osu.edu/b.php?i=1156461852&m=5960d893a06b&c=n> Forget previous vote <https://antispam.osu.edu/b.php?i=1156461852&m=5960d893a06b&c=f> ________________________________ Heriot-Watt University is a Scottish charity registered under charity number SC000278. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/. -- Heriot-Watt University is a Scottish charity registered under charity number SC000278. ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
