920733 - PDX corp network authentication server stops responding

Status: RESOLVED FIXED

(Infrastructure & Operations Graveyard :: NetOps: Office Wireless, task)

Description

[Dietrich Ayala (:dietrich)]

Attachment: Screen Shot 2013-09-25 at 1.12.52 PM.png

I've had the problem a few times now, but the last few days have been really bad, with multiple people in the office experiencing this, or something similar (unable to authenticate).

On my 2013 MBA, just imaged last week, it took ~10 minutes of attempts before was able to connect.

Screenshot attached.

Comment 1

[Christie Koehler [:ckoehler]]

Attachment: ck-syslog.log

Log from my laptop.
Ubuntu 13.04. Kernel 3.8.0-30-generic. 64-bit.
Centrino Advanced-N 6205
configuration: broadcast=yes driver=iwlwifi driverversion=3.8.0-30-generic firmware=18.168.6.1 ip=10.248.25.53 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn

Comment 2

[(dormant account)]

Attachment: authlogs.txt

Network is unusable using AR928X-type(eg best wifi linux has to offer) wifi card on Linux. It's supersolid everywhere, except on the mozilla network. Every time the card tries to switch access points it ends up suspending my tcp connections while it deals with auth timeouts at lower levels. This is lame and makes wireless unusable in Linux. 
It works fine in Windows.

Comment 3

[Derek Moore [:dmoore]]

(In reply to Taras Glek (:taras) from comment #2)
> Created attachment 810623 [details]
> authlogs.txt
> 
> Network is unusable using AR928X-type(eg best wifi linux has to offer) wifi
> card on Linux. It's supersolid everywhere, except on the mozilla network.
> Every time the card tries to switch access points it ends up suspending my
> tcp connections while it deals with auth timeouts at lower levels. This is
> lame and makes wireless unusable in Linux. 
> It works fine in Windows.

Not to discount other wireless issues in this bug, but the iwlwifi driver has known issues with 802.11n (sometimes all 5GHz bands) and AP roaming. I suspect this is your issue, as well, given that the same hardware works fine under Windows. I was able to fix this by disabling 802.11n under linux:

options iwlwifi 11n_disable=1

Comment 4

[Derek Moore [:dmoore]]

In Taras' case, the client is also frequency hopping between 2.4GHz and 5GHz. This is another known issue with the iwlwifi driver, but I'm not aware of any current workaround. Perhaps it would be possible to drop 2.4GHz support entirely, like we've had to do for the wireless network in Mountain View.

Comment 5

[Jason Crowe [:jd]]

Attachment: jd-syslog

I am also having wifi issues and have no issues anywhere except the PDX office. Let me know if I can provide any additional information that might help to troubleshoot the issue.

OS: Kubuntu 12.04.3
Kernel: Linux 3.2.0-53-generic x86_64
Network controller: Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] (rev 34)

Comment 6

[Dietrich Ayala (:dietrich)]

Haven't seen this lately.

Comment 7

[James Barnell [:jbarnell]]

Closing but by all means reopen if the issue surfaces again.