Hi Kees,
Thanks for this advise! Question : 802.11h works only together with 5 GHz. In a Cisco environment you can choice between 802.11h or DTPC (802.11a Global parameters/General) Are there also known problems with DTPC and Yosemite and Is it wise to turn off (temporarily) 802.11h and turn on DTPC for 5 GHz ? Gertjan Scharloo ICT Consultant _____ Universiteit van Amsterdam | Hogeschool van Amsterdam ICT Services Leeuwenburg | kamer A9.44 Weesperzijde 190 | 1097 DZ Amsterdam +31 (0)20 525 4885 Mobiel : +31(0) 61013-5880 <http://www.uva.nl/> www.uva.nl uva.nl/profile/g.scharloo Beschikbaar : Ma | - | Wo | Do | Vr | From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:[email protected]] On Behalf Of Kees Pronk Sent: Thursday, April 2, 2015 2:55 PM To: [email protected] Subject: [WIRELESS-LAN] MAC OS X Yosemite 10.10.2 Wi-Fi issues (update) FYI : I think I found a very relevant post about Yosemite issues in enterprise WLAN environments. IMHO due to many IE received in a large environment, MacBooks with Yosemite OSX can/will falter. https://discussions.apple.com/thread/6825371 Sincerely, Kees Pronk On 03 Mar 2015, at 14:47, Walter Reynolds <[email protected] <mailto:[email protected]> > wrote: The reason we turn off IPv6 is basically that some Mac's were unable to get a IPv4 address when they had V6 enabled. It has been a problem for a while, and at this point it is just one of the many issues we have with Apple devices in general, not just on 10.10 We do have Cisco, but do not have V6 enabled everywhere. No link to the page as it is an internal document. That is why I copied the text and put it in the email. ------------------------ Walter Reynolds Principal Systems Security Development Engineer Information and Technology Services University of Michigan (734) 615-9438 On Tue, Mar 3, 2015 at 8:26 AM, Frans Panken <[email protected] <mailto:[email protected]> > wrote: Hi Walter, Good suggestions. What is the reason you suggest to turn off IPv6 on Wi-Fi? Do you have Cisco (we have a TAC case where IPv6 does not work well)? I wonder which Wi-Fi degradations you prevent by turning off IPv6. Can you explain (link to a page)? -Frans Walter Reynolds schreef op 03/03/15 om 13:49: We also have seen a huge rise in issues. 10.10.3 which is being tested right now seems better, but not a solution. Here is some of what we tell folks who have issues. The firts set removes all network settings, but seems to help the most. REMOVE MACHINE NETWORKING PREFERENCES 1. Click on the WiFi icon in the top menu bar and select: Turn Wi-Fi Off. 2. Click anywhere on the desktop. 3. Click on Go on the top of your screen. 4. Choose Computer 5. Choose your hard drive (it may be named "Macintosh HD") 6. Choose Library 7. Choose Preferences 8. Choose SystemConfiguration 9. If the following items exist in the SystemConfiguration folder, drag them to the trash. (Note: They may not all exist.) com.apple.airport.preferences.plist com.apple.eapolclient.plist com.apple.network.eapolclient.configuration.plist com.apple.network.identification.plist com.apple.wifi.message-tracer.plist
 NetworkInterfaces.plist preferences.plist 10. Restart your computer. NOTE: After doing this step, you will need to rejoin any WiFi networks you have at home, etc. ADJUST WIFI NETWORK WAKE SETTINGS 1. Open the Energy Saver system preferences (It can be found at Apple Menu > System Preferences... > Energy Saver) 2. If using a Macintosh laptop, click on the Power Adapter button. 3. Uncheck Wake for Wi-Fi network access. ADJUST AIRDROP SETTINGS (NOTE: This step is only for newer Macs having the awdl0 interface) 1. In the bottom dock, click on the Finder icon. 2. In the Finder window that appears, on the left side click on AirDrop. 3. Look at the bottom of the right side of the AirDrop window. 4. Look for the pulldown labeled: Allow me to be discovered by 5. If the pulldown is there, select No One. NOTE: If the pulldown is not at the bottom of the AirDrop window, your machine does not have the awdl0 interface. You can skip this step. TURN OFF IPv6 NETWORKING 1. Open the Terminal application. (It can be found at Applications > Utilities > Terminal) 2. Type the following command: networksetup -setv6off Wi-Fi 3. Hit return on the keyboard. (You won't see any visible change, but the command has been executed.) 4. Close the Terminal window. ------------------------ Walter Reynolds Principal Systems Security Development Engineer Information and Technology Services University of Michigan (734) 615-9438 <tel:%28734%29%20615-9438> On Mon, Mar 2, 2015 at 8:52 AM, Kees Pronk <[email protected] <mailto:[email protected]> > wrote: Just wondering if anyone can share opinions / experience on this one. There is a big discussion at : https://discussions.apple.com/thread/6601963?tstart=0 Our University has seen a steep rise on connectivity issues since 10.10.2 was released, both on our open SSID as on eduroam. Sincerely, Kees Pronk Disclaimer ( http://www.avans.nl/over-avans/e-mail-disclaimer ) ********** 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/. ********** 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/. Disclaimer ( http://www.avans.nl/over-avans/e-mail-disclaimer ) ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
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