Re: [WIRELESS-LAN] Broadcom Win8.1 clients not accepting DHCP offer

[Tristan Gulyas]

Hi all,

Thanks for your information! Looks like this is a thing….

Has anyone chased this up with wireless vendors (assuming this has only been 
observed on a Cisco network) to work out whether it’s a Broadcom or Cisco 
issue? 

I don’t have one of these devices myself to reproduce the issue in testing 
which will make TAC case troubleshooting and diagnosis very challenging to 
provide.

I’ve had a report of success from a student who has downgraded their release to 
6.30.59.15 (previously 6.30.223.102).

Ideally a root cause analysis will require packet captures to find out what’s 
going on in wireless client land and what’s different about the packets between 
devices that work and devices that don’t.  Has anybody progressed to that stage?

Cheers,
Tristan
 
 
Tristan Gulyas
Wireless Network Engineer
Network Operations
eSolutions | Monash University
738 Blackburn Road Clayton 3800
Office: 03 9902 9092 | Mobile: 0403 224 484
www.monash.edu | tristan.gul...@monash.edu
 




On 28 Mar 2014, at 2:57 am, Eric T. Barnett  wrote:

> I’ve only seen one, but I fixed it by rolling back to a Windows 7 driver. I 
> was running Cisco 7.5 at the time. Very frustrating as it worked with a Mi-Fi 
> I had handy. If I recall, someone else said that it was sending the DHCP 
> request and the server was receiving it, but the client wasn’t receiving the 
> reply for some reason.
>  
> Regards,
>  
> Eric Barnett
> Senior Network Engineer/Wireless Administrator
> Information and Technology Services
> Arkansas State University
> (870) 680-4243
> http://wireless.astate.edu
>  
>  
>  
> From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
> [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Tristan Gulyas
> Sent: Thursday, March 27, 2014 12:26 AM
> To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
> Subject: [WIRELESS-LAN] Broadcom Win8.1 clients not accepting DHCP offer
>  
> Hi all,
>  
> We’ve seen several occurrences of an issue where wireless clients would not 
> accept an IP address from our DHCP server after authenticating.
>  
> This seems to be limited to Broadcom devices running either Windows 8.1 or 
> Ubuntu Linux (seen this on 12.04).
>  
> Our infrastructure is Cisco based (derivative of 7.2.111.3 firmware) on 3600 
> series APs. 
>  
> Has anybody else seen something similar?
>  
> Cheers,
> Tristan
>  
>  
> Tristan Gulyas
> Wireless Network Engineer
> Network Operations
> eSolutions | Monash University
> 738 Blackburn Road Clayton 3800
> www.monash.edu | tristan.gul...@monash.edu
>  
>  
>  
>  
>  
> ** Participation and subscription information for this EDUCAUSE 
> Constituent Group discussion list can be found 
> athttp://www.educause.edu/groups/.
> ** Participation and subscription information for this EDUCAUSE 
> Constituent Group discussion list can be found at 
> http://www.educause.edu/groups/.


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Contact for Polytechnique Montreal

[Peter Arbouin]

Hi,

Would anyone know who the contact is for Polytechnique Montreal?

Thanks,

Peter.

Peter Arbouin | Network Engineer
IT Networks | Information Technology Services
Queensland University of Technology
Level 3 | 88 Musk Avenue | Kelvin Grove Campus
Mob: 0402476892 | Ph: +61 7 3138 1030
Email: p.arbo...@qut.edu.au

CRICOS No. 00213J


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RE: [WIRELESS-LAN] Broadcom Win8.1 clients not accepting DHCP offer

[Eric T. Barnett]

I've only seen one, but I fixed it by rolling back to a Windows 7 driver. I was 
running Cisco 7.5 at the time. Very frustrating as it worked with a Mi-Fi I had 
handy. If I recall, someone else said that it was sending the DHCP request and 
the server was receiving it, but the client wasn't receiving the reply for some 
reason.

Regards,

Eric Barnett
Senior Network Engineer/Wireless Administrator
Information and Technology Services
Arkansas State University
(870) 680-4243
http://wireless.astate.edu



From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Tristan Gulyas
Sent: Thursday, March 27, 2014 12:26 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: [WIRELESS-LAN] Broadcom Win8.1 clients not accepting DHCP offer

Hi all,

We've seen several occurrences of an issue where wireless clients would not 
accept an IP address from our DHCP server after authenticating.

This seems to be limited to Broadcom devices running either Windows 8.1 or 
Ubuntu Linux (seen this on 12.04).

Our infrastructure is Cisco based (derivative of 7.2.111.3 firmware) on 3600 
series APs.

Has anybody else seen something similar?

Cheers,
Tristan



Tristan Gulyas
Wireless Network Engineer
Network Operations
eSolutions | Monash University
738 Blackburn Road Clayton 3800
www.monash.edu | 
tristan.gul...@monash.edu







** 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/.

RE: [WIRELESS-LAN] Broadcom Win8.1 clients not accepting DHCP offer

[Moore, Brandon]

Saw this on a Lenovo w/ Broadcom nic (Win 8.1) earlier this week that would 
grab a lease on our older Cisco 1242’s/1131’s but not the newer 2600’s.


Brandon Moore
Network Analyst
ITCS- Network Engineering
East Carolina University
[MCj0323403[1]] 252-328-9000
mail to: moo...@ecu.edu



From: The EDUCAUSE Wireless Issues Constituent Group Listserv 
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Craig Eyre
Sent: Thursday, March 27, 2014 10:24 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Broadcom Win8.1 clients not accepting DHCP offer


We've seen this on alot of Lenovo laptops after they upgraded to Windows 8.1 
and we just roll back the driver to a version around 5.30 and it seems to solve 
the problem. The comment is that they can connect at home but cannot connect to 
anything enterprise level.

Cannot comment on the Ubuntu portion.


Craig Eyre
Network Analyst
IT Services Department
Mount Royal University
4825 Mount Royal Gate SW
Calgary AB T2P 3T5

P. 403.440.5199
E. ce...@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


[Inactive hide details for Tristan Gulyas ---03/26/2014 11:26:30 PM---Hi all, 
We’ve seen several occurrences of an issue where]Tristan Gulyas ---03/26/2014 
11:26:30 PM---Hi all, We’ve seen several occurrences of an issue where wireless 
clients would not accept an IP add

From: Tristan Gulyas 
mailto:tristan.gul...@monash.edu>>
To: 
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU,
Date: 03/26/2014 11:26 PM
Subject: [WIRELESS-LAN] Broadcom Win8.1 clients not accepting DHCP offer
Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv 
mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>>





Hi all,

We’ve seen several occurrences of an issue where wireless clients would not 
accept an IP address from our DHCP server after authenticating.

This seems to be limited to Broadcom devices running either Windows 8.1 or 
Ubuntu Linux (seen this on 12.04).

Our infrastructure is Cisco based (derivative of 7.2.111.3 firmware) on 3600 
series APs.

Has anybody else seen something similar?

Cheers,
Tristan


Tristan Gulyas
Wireless Network Engineer
Network Operations
eSolutions | Monash University
738 Blackburn Road Clayton 3800
www.monash.edu | 
tristan.gul...@monash.edu






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

Re: 11ac migration question

[Stratton, Brandon M]

Damien,

Depending on the demand in the classroom, we designed our 11n for 2.1 devices 
per person (chair) in the room. Because we have seen good results with our band 
steering, resulting in close to 50/50 distribution between 5 and 2.4, we have 
gotten away with one AP per 40 - 50 chairs. There has been a few times when 
professors decided to bring a particularly throughput heavy application in the 
classroom, I try not to take it personally, and we have had to add an 
additional 11n AP. With the current 11ac deployment we have decided not to 
change out the single 11n AP and instead install an 11ac AP and have had great 
results. The standard we promote is 5Mbps up and down per student and we have 
yet to run into an environment or application that has come close to 
challenging that with the few areas with 11ac. 

To the second question we have seen improvements with both 11n and 11ac clients 
on the AP832 which could change design parameters. With that said of the 60k 
clients we see per day here only about 100 are 11ac and therefore we still 
design around the lowest common denominator.

Because we are using Meru I don't know how much this helps but thought I would 
share.


Brandon Stratton
ES Network Administrator 2
bmstrat...@uh.edu
832-842-4714






--

Date:Wed, 26 Mar 2014 11:25:48 -0400
From:"Cameron, Damien L." 
Subject: Re: 11ac migration question

For those that have already migrated some buildings to 802.11ac, what are y= 
our general findings for AP placement?

We have an Aruba environment. Based on guides and virtual surveys using Vis= 
ualRFPlan it seems like I am coming to the conclusion that an AP per classr= 
oom (depending on size - mostly medium sized 20' by 20') would provide suff= 
icient performance.

Also is your goal to provide full ac coverage, or full n coverage with ac c= 
apabilities in classrooms?

Thanks.

Damien Cameron
Network Engineer
Norfolk State University
Office of Information Technology
Marie v. McDemmond Center for applied Research Room 401
555 Park Avenue
Norfolk, VA 23504
O: (757) 823-9123

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Re: [WIRELESS-LAN] Broadcom Win8.1 clients not accepting DHCP offer

[Craig Eyre]

We've seen this on alot of Lenovo laptops after they upgraded to Windows 8.1 and we just roll back the driver to a version around 5.30 and it seems to solve the problem. The comment is that they can connect at home but cannot connect to anything enterprise level. 

Cannot comment on the Ubuntu portion.


Craig Eyre          
Network Analyst
IT Services Department
Mount Royal University
4825 Mount Royal Gate SW
Calgary AB T2P 3T5

P. 403.440.5199
E. ce...@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


Tristan Gulyas ---03/26/2014 11:26:30 PM---Hi all, We’ve seen several occurrences of an issue where wireless clients would not accept an IP add

From:	Tristan Gulyas 
To:	WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU, 
Date:	03/26/2014 11:26 PM
Subject:	[WIRELESS-LAN] Broadcom Win8.1 clients not accepting DHCP offer
Sent by:	The EDUCAUSE Wireless Issues Constituent Group Listserv 



Hi all,

We’ve seen several occurrences of an issue where wireless clients would not accept an IP address from our DHCP server after authenticating.

This seems to be limited to Broadcom devices running either Windows 8.1 or Ubuntu Linux (seen this on 12.04).

Our infrastructure is Cisco based (derivative of 7.2.111.3 firmware) on 3600 series APs. 

Has anybody else seen something similar?

Cheers,
Tristan
 


 
Tristan Gulyas
Wireless Network Engineer
Network Operations
eSolutions | Monash University
738 Blackburn Road Clayton 3800
www.monash.edu | tristan.gul...@monash.edu
 





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

Re: [WIRELESS-LAN] Broadcom Win8.1 clients not accepting DHCP offer

[Jason Becker]

Yes, we've seen the same thing here. Just to get the student's laptops 
working we've just been giving them a usb wireless card.
Cisco gave me one thing to try but I have not been able to get my hands 
back on a broken one, but they said to try and install a different driver.


Thanks,
Jason


On 3/27/14, 12:25 AM, Tristan Gulyas wrote:

Hi all,

We’ve seen several occurrences of an issue where wireless clients 
would not accept an IP address from our DHCP server after authenticating.


This seems to be limited to Broadcom devices running either Windows 
8.1 or Ubuntu Linux (seen this on 12.04).


Our infrastructure is Cisco based (derivative of 7.2.111.3 firmware) 
on 3600 series APs.


Has anybody else seen something similar?

Cheers,
Tristan

**
*Tristan Gulyas*
Wireless Network Engineer
Network Operations
eSolutions | Monash University
738 Blackburn Road Clayton 3800
www.monash.edu  | tristan.gul...@monash.edu 







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




--
Jason Becker
Network Systems Engineer,
Network Planning and Services
Tel:(314)935-5006


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