Re: [WIRELESS-LAN] dropped connections on Macbooks with Cisco WLC 7.6.100.0

[mike . albano]

Can you perform a packet capture and identify exactly when the failure is occurring? Sniffer AP/Omnipeek/AirPCap etc (or more easily a 3SS macbook via airport utilities...see here:  http://rfsperra.tumblr.com/post/68654132591/capturing-802-11-traffic-with-os-x  ).

Taking a closer look at the packets, while time consuming, should help you get closer to the root cause. TAC will likely want this as well.

-----The EDUCAUSE Wireless Issues Constituent Group Listserv <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> wrote: -----

To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
From: "Spurgeon, Charles E"
Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv
Date: 01/21/2014 12:13PM
Subject: Re: [WIRELESS-LAN] dropped connections on Macbooks with Cisco WLC 7.6.100.0

After getting complaints about connectivity drops on both Mabook Pro and Macbook Air laptops, I was able to replicate the issue on the 5 GHz radio, in either a model 3700 AP or a model 3600 with ac module. No issues are seen (connection stays up for 30 minutes of testing) on 5 GHz in a model 3500 or on a model 3600 with no ac module.

 

To make a stable testbed I created an SSID that was identical to our production SSID with the exception of a radio policy of 5GHz only. Next, I created an AP group for testing with that SSID, and put the 3600 or 3700 AP into that group. So the test AP only has one SSID and only on the 5GHz radio.

 

Once associated with this SSID, the laptop is able to ping its own IP addr, but not the gw addr. The laptop will be able to ping an addr on the campus or Internet until it stops working, which will happen anywhere from 10 to 20 minutes into the test.

 

This result also occurs on an MBA with IPv6 disabled.

 

So far the test connection eventually fails on a mid-2013 MBA running 10.9.1 and a mid-2010 MBPro, running either 10.9 or 10.8.5.

 

-Charles

 

From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Tristan Gulyas
Sent: Sunday, January 19, 2014 6:13 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] dropped connections on Macbooks with Cisco WLC 7.6.100.0

 

Hi guys,

 

We’re about to start piloting 7.6.100.0 with a variety of clients -  what’s the best way to test/reproduce this issue?

 

Cheers,

Tristan

 

 

 

On 17 Jan 2014, at 9:51 am, Luke Jenkins < ljenk...@weber.edu> wrote:

We provide native dual stack access for our wireless clients, so that could be why we aren't seeing the issue.

 

-Luke

 

On Thu, Jan 16, 2014 at 2:33 PM, Lee H Badman < lhbad...@syr.edu> wrote:

We have found that disabling client-side IPv6  (we also are not set up for it) puts an end to most OS X issues. Sometimes is the fix for random Win problems, but very prevalent in OS X space.

-----Original Message-----
From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Scott Allen
Sent: Thursday, January 16, 2014 4:30 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] dropped connections on Macbooks with Cisco WLC 7.6.100.0

Good point.  I had a couple of problem tickets (7.4.100.0) that on
further investigation Prime showed the clients were connected only
IPv6 and getting nowhere because we don't have IPv6 enabled.
-Scott


On Thu, Jan 16, 2014 at 4:22 PM, Lee H Badman < lhbad...@syr.edu> wrote:
> We're doing fine with WPA-2, PEAP, MS-CHAP v2. I hate to say it- but try
> disabling IPv6 on the problem machine, and make sure no OS X updates
> waiting.
>
>
>
> From: The EDUCAUSE Wireless Issues Constituent Group Listserv
> [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU ] On Behalf Of Luke Jenkins
> Sent: Thursday, January 16, 2014 3:06 PM
> To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> Subject: Re: [WIRELESS-LAN] dropped connections on Macbooks with Cisco WLC
> 7.6.100.0
>
>
>
> We're running 7.6 with a mix of APs including 3602s, no reports of this
> issue here and I've not noticed it on my Macbook Pro. Though it could always
> be some setting we don't have in common such as different encryption types,
> QoS, or HA that are causing the issue.
>
>
>
> Happy to drill down into the nitty gritty off list if you want to check
> configs, drop me a line.
>
>
>
> -Luke
>
>
>
>
>
> On Thu, Jan 16, 2014 at 12:40 PM, Spurgeon, Charles E
> <c.spurg...@austin.utexas.edu > wrote:
>
> Has anyone else seen a dropped connection issue with Macbooks and Cisco WLC
> v 7.6.100.0 code?
>
>
>
> We are pilot testing 7.6.100.0 code on a WiSM2 card supporting staff APs and
> have noticed a dropped connection issue with Macbooks when associated with
> the 5GHz radio on model 3602i or 3702i APs.
>
>
>
> The connection typically fails after approx. 15 minutes, usually leaving the
> client with an IP addr which it can ping, but the client cannot ping the gw
> addr or anything beyond the gw. The client WiFi interface reports that it is
> still associated, which is confirmed on the controller side of the
> connection.
>
>
>
> For one Macbook the test AP is directly above the laptop, with a
> 5GHz-specific and AP-specific SSID to help isolate the issue.
>
>
>
> IOS and Windows7 platforms do not appear to have the issue when associated
> to the same SSID on the same AP.
>
>
>
> But so far three Macbooks (two Macbook Air with dot11ac, one Macbook Pro
> with dot11n) have demonstrated the dropped connection issue. They are all
> running Mac OS X 10.9.x (Mavericks).
>
>
>
> The issue does not occur when the test 3602i AP is moved back to 7.4 code.
>
>
>
> Thanks,
>
>
>
> -Charles
>
>
>
> Charles E. Spurgeon
>
> University of Texas at Austin / ITS Networking
>
> c.spurg...@its.utexas.edu / 512.475.9265
>
> ********** Participation and subscription information for this EDUCAUSE
> Constituent Group discussion list can be found at
> http://www.educause.edu/groups/.
>
>
>
>
>
> --
>
> =-=-=-=-=-=-=-=-=-=-=-=
>
> Luke Jenkins
> Network Engineer
> Weber State University
>
> ********** 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/.



--

Scott Allen
Director, Network Services
Georgetown University
sc...@georgetown.edu
mobile - 202-309-5739

**********
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**********
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Luke Jenkins
Network Engineer
Weber State University

********** 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/.