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I have seen some discussions about MACs dropping off wireless networks. I believe there may be some solutions.

 

Can someone direct me to articles that discuss possible fixes for this?

 

-Jeff Legge

Radford University

jglegge@radford.edu

********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.

Comments

We had a similar issue yesterday. Only the PCs ones would connect. All MACs dropped. 
 
 
Message from jhealy@logn.net

Though it can come across as a cop-out, have you disabled IPv6 on the clients?   -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Jason Healy Sent: Friday, October 26, 2012 10:22 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] MAcbooks dropping off wireless network
Message from cwieri39@calvin.edu

We have been having issues with certain Macs dropping off our wireless network as well this semester, and have tried a variety of things to resolve it. 1. (As Lee mentioned) Disable IPv6 if you aren't running it on your wireless network. 2. Make sure that MCS rate 0 is not disabled for 802.11n (both 5ghz and 2.4ghz) ( http://tinyurl.com/8boy3dp ) 3. Tune the aggressiveness down of Client Load Balancing or disable it altogether The one thing that made the most difference was #1; disabling IPv6 on the end-user machines have cleared up almost every one of my complaints. I've played with options 2 and 3 pretty extensively, but I couldn't see any noticeable change for our end-users by adjusting them. Chris >>> On 10/26/2012 at 10:30 AM, Lee H Badman wrote: > Though it can come across as a cop-out, have you disabled IPv6 on the clients? > > > > > > -----Original Message----- > From: The EDUCAUSE Wireless Issues Constituent Group Listserv > [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Jason Healy > Sent: Friday, October 26, 2012 10:22 AM > To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > Subject: Re: [WIRELESS-LAN] MAcbooks dropping off wireless network > >
Message from ceyre@mtroyal.ca

I don't believe you can disable IPv6 in the newest version of OS X but if someone has a way please pass it along. Regards, Craig Eyre Network Analyst IT Services Department Mount Royal University 4825 Mount Royal Gate SW Calgary AB T2P 3T5 P. 403.440.5199 E. ceyre@mtroyal.ca "The difference between a successful person and others is not a lack of strength, not a lack of knowledge, but rather in a lack of will." Vincent T. Lombardi From: Christopher Wieringa To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU, Date: 10/26/2012 09:06 AM Subject: Re: [WIRELESS-LAN] MAcbooks dropping off wireless network Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv We have been having issues with certain Macs dropping off our wireless network as well this semester, and have tried a variety of things to resolve it. 1. (As Lee mentioned) Disable IPv6 if you aren't running it on your wireless network. 2. Make sure that MCS rate 0 is not disabled for 802.11n (both 5ghz and 2.4ghz) ( http://tinyurl.com/8boy3dp ) 3. Tune the aggressiveness down of Client Load Balancing or disable it altogether The one thing that made the most difference was #1; disabling IPv6 on the end-user machines have cleared up almost every one of my complaints. I've played with options 2 and 3 pretty extensively, but I couldn't see any noticeable change for our end-users by adjusting them. Chris >>> On 10/26/2012 at 10:30 AM, Lee H Badman wrote: > Though it can come across as a cop-out, have you disabled IPv6 on the clients? > > > > > > -----Original Message----- > From: The EDUCAUSE Wireless Issues Constituent Group Listserv > [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Jason Healy > Sent: Friday, October 26, 2012 10:22 AM > To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > Subject: Re: [WIRELESS-LAN] MAcbooks dropping off wireless network > >
> On Friday, 26. October 2012 at 17:21, Craig Eyre wrote: > > I don't believe you can disable IPv6 in the newest version of OS X but if > > someone has a way please pass it along. > in the command-line: networksetup -setv6off Wi-Fi -sk -- Stefan Kronawithleitner Johannes Kepler University, InformationManagement (IM) - Network and Telephony stefan.kronawithleitner@jku.at (mailto:stefan.kronawithleitner@jku.at) +43 732 2468 3923 SK3112-RIPE ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Message from jhealy@logn.net

Have you tried setting up a filter on your APs to block out all IPv6? We had similar symptoms on Macs that turned out to be due to Windows machines with broken ICS configurations sending out RA packets, even though they didn't have any real functional IPv6 configuration. The apparent flapping was due to dead gateway detection on the Macs. Filtering our all IPv6 packets prevented the clients from getting the bogus IPv6 connectivity, and cleared up the symptoms. Frank Sweetser fs at wpi.edu | For every problem, there is a solution that Manager of Network Operations | is simple, elegant, and wrong. Worcester Polytechnic Institute | - HL Mencken On 10/26/2012 11:06 AM, Christopher Wieringa wrote: > We have been having issues with certain Macs dropping off our wireless network as well this semester, and have tried a variety of things to resolve it. > > 1. (As Lee mentioned) Disable IPv6 if you aren't running it on your wireless network. > 2. Make sure that MCS rate 0 is not disabled for 802.11n (both 5ghz and 2.4ghz) ( http://tinyurl.com/8boy3dp ) > 3. Tune the aggressiveness down of Client Load Balancing or disable it altogether > > The one thing that made the most difference was #1; disabling IPv6 on the end-user machines have cleared up almost every one of my complaints. I've played with options 2 and 3 pretty extensively, but I couldn't see any noticeable change for our end-users by adjusting them. > > Chris > >>>> On 10/26/2012 at 10:30 AM, Lee H Badman wrote: >> Though it can come across as a cop-out, have you disabled IPv6 on the clients? >> >> >> >> >> >> -----Original Message----- >> From: The EDUCAUSE Wireless Issues Constituent Group Listserv >> [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Jason Healy >> Sent: Friday, October 26, 2012 10:22 AM >> To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU >> Subject: Re: [WIRELESS-LAN] MAcbooks dropping off wireless network >> >>
Message from russ.leathe@gordon.edu

Disabling IPv6 on both the client and eliminating the ACL on the controller. Also mDNS is an issue with MAC clients. We disabled mDNS at the controller level as well. At the controller CMD what's the result of 'Show ip igmp group'? also run 'show datapath utilization' and make sure your CPU's are close to zero. -----Original Message----- From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Jason Healy Sent: Friday, October 26, 2012 11:45 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] MAcbooks dropping off wireless network
Message from jhealy@logn.net

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