Sorry if you get this twice. I sent it last night, but noticed that I didn’t
receive it from the listserv. Chuck
____________________________________________________________________________________________
I've tried to get an answer about this that I can understand, but haven't had
any luck. It's probably my fault. I think I'm reasonably fluent in RF, but
perhaps I'm not after all.
Nonetheless, here's what I think is going on:
Back in the early days of wi-fi everything had one RF chain. The EIRP of that
radio was the total EIRP, so when the FCC set limits we all knew what they
limitted. Enter 802.11n and as many as 4 RF chains. If you set the Tx power
of the each radio to 6dB the total EIRP (the sum of the 4 radios) will be
higher. The relevant sections of Part 15 weren't written with MIMO in mind, so
the language was ambiguous. A few years ago the FCC clarified that the power
they cared about was the total power and provided revised guidance for
calculating it, which got incorporated into manufacturer's code updates.
That's why you could have APs with a power range of 3 to 21 when you purchased
them, and after a code upgrade the range suddenly became 7 to 28 – each radio’s
output was unchanged, it's just calculated differently.
Here's the part that's still a mystery to me. What is the Tx power when a
transmission only has one spacial stream? Client devices make roaming
decisions based on beacons and probe responses, which I'm pretty sure use a
single stream. Do these single stream frames go out over one RF chain? I
assume so, but don't know. If so, the min EIRP for single stream could be
lower than the documented minimums. If I set my min Tx power to 7dBm based on
total radiated power, what's the Tx power for a beacon frame? Is it 7 or is it
3? If the answer is 7, then what if I set my min Tx power to 3? Obviously
when all the streams are being used the EIRP will be 7 and not three, but when
one stream is used might it be 3? If not, why not? This could have a
significant impact on client behavior and I can't find the answer. If anybody
knows I'd be indebted to you.
Chuck
________________________________
From: Michael Davis <da...@udel.edu>
Sent: Wednesday, October 14, 2020 3:14 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Client roaming
Is there a reliable way to read TX power in ArubaOS 8 ? When we moved to
in-room
APs I set them on a profile with moderate 5GHz power and absolute minimum
2.4GHz, but
this year I'm seeing the same MacOS/iOS issues as others and in trying some
older CLI
commands, it appears that maybe my settings are not what I would expect?
Does the below indicate that the min 2.4GHz EIRP for this hardware (AP-303H) is
7.0 (6.2)
and my attempts at forcing it between 3-6 is futile?
-----
MD%show ap debug driver-log ap-name AP-NAME | include EIRP
127 17444000.666666 Radio0: User EIRP 18.0 Actual EIRP 18.0 Max EIRP 28.6
Min EIRP 7.6
128 17517190.778855 Radio1: User EIRP 7.0 Actual EIRP 7.0 Max EIRP 22.1 Min
EIRP 6.2
-----
rf dot11g-radio-profile "inroom_radio_g_ui"
no high-efficiency-enable
am-scan-profile "inroom_radio_g_ui_amscan_g_ui"
eirp-min 3
eirp-max 6
!
rf dot11a-radio-profile "inroom_radio_a_ui"
no high-efficiency-enable
smart-antenna
am-scan-profile "inroom_radio_a_ui_amscan_a_ui"
max-channel-bandwidth 40MHz
eirp-min 15
eirp-max 18
On 10/14/20 9:05 AM, McGuire, Michael wrote:
I was so happy to come across this thread last night. As I started reading
through the descriptions of what others are experiencing I began to realize
maybe I'm not crazy (maybe).
We're an Aruba shop and have been struggling with the same reports of poor
performance in the residence halls for the past 2-3 weeks.
Last week the pattern finally began to emerge that most clients having issues
are MacOS & iOS, which seem to be hanging onto the 2.4GHz radio.
Even in locations where the student is in the same room (our residence halls
are APs in every suite common area or every other room in traditional halls)
they were still on the 2.4GHz radio.
AirWave would show the client's health fluctuating from near 100% to 30% and
constant gaps in Usage data within the 2 hour window. The SSID had a "Too Many
Frame Errors/sec" of over 2,000 frames/s.
I've been making some head way by increasing the max for 5GHz slightly, while
severely limiting max power on the 2.4 GHz.
This seems to be getting most clients (not all) to move to the 5GHz radio where
they are showing MUCH better stats.
As these are Residence Halls and given the current pandemic, going room to room
to take measurements in these locations is not feasible.
- Michael
Michael McGuire
Network Systems Administrator
Monmouth University
mmcgu...@monmouth.edu<mailto:mmcgu...@monmouth.edu>
732.263.5589
[Monmouth University
Logo]<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.monmouth.edu%2F%3Futm_source%3DEmail%2BSignature%26utm_medium%3Demail%26utm_campaign%3DEmail%2BSignature%2BGenerator&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397420739&sdata=IOxOc5on4aMz73so6lxwFF14Ep2q3gRWfJYMlpCzIGY%3D&reserved=0>
400 Cedar Avenue
West Long Branch, NJ 07764
monmouth.edu<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.monmouth.edu%2F%3Futm_source%3DEmail%2BSignature%26utm_medium%3Demail%26utm_campaign%3DEmail%2BSignature%2BGenerator&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397430736&sdata=EfA6SpepxhyVTZrI6HqnirbpXtZr6yClPvkH7Py2mJI%3D&reserved=0>
[https://www.monmouth.edu/identity/wp-content/uploads/sites/61/2018/08/social-icons-twitter.png]<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftwitter.com%2Fmonmouthu&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397430736&sdata=2iCnfjBr84b9dl9kZs%2FC0dgC3%2FV%2BT7spWIADCpsYhrU%3D&reserved=0>
[https://www.monmouth.edu/identity/wp-content/uploads/sites/61/2018/08/social-icons-facebook.png]<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.facebook.com%2FMonmouthUniversity&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397440729&sdata=Wnc0cL%2BdXFIkt0hQqq4tQntwxvZa4nhSM9rnKoSwxqI%3D&reserved=0>
[https://www.monmouth.edu/identity/wp-content/uploads/sites/61/2018/08/social-icons-instagram.png]<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Finstagram.com%2Fmonmouthuniversity&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397440729&sdata=Q1XtzJfCNUVlasRD7P%2FzM%2BGrnDeqF%2BgA3GGv5LI8YCs%3D&reserved=0>
[https://www.monmouth.edu/identity/wp-content/uploads/sites/61/2018/08/social-icons-snapchat.png]<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.snapchat.com%2Fadd%2Fmonmouthu&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397450727&sdata=ChkfhZ183VbnKLGD7hwFgxk7c51clZrSGkNu3bJhIwU%3D&reserved=0>
[https://www.monmouth.edu/identity/wp-content/uploads/sites/61/2018/08/social-icons-linkedin.png]<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.linkedin.com%2Fschool%2Fmonmouth-university%2F&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397450727&sdata=pdI1dBit6YONOenoDsCb5fQ9qDOZw9YrawqpniswCpg%3D&reserved=0>
[https://www.monmouth.edu/identity/wp-content/uploads/sites/61/2018/08/icons-green.png]
We are a green campus.
Think before you print.
From: The EDUCAUSE Wireless Issues Community Group Listserv
[mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of Mallon, Jason
Sent: Friday, October 9, 2020 18:01
To:
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Subject: [External] Re: [WIRELESS-LAN] Client roaming
Thanks for all the responses on this.
Thanks,
Jason Mallon | Network Engineer III
[/var/folders/h2/r448cc4j4_v70yns10brx6r00000gq/T/com.microsoft.Outlook/Content.MSO/90F25235.tmp]
OIT
The University of Alabama
<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flinkprotect.cudasvc.com%2Furl%3Fa%3Dhttps%253a%252f%252fwww.ua.edu%252f%26c%3DE%2C1%2CV5qXeZkRv6yxNLE0Oxazl6pf-AXKnubI8tN6R1DfN2NXUxnNck6qgxWSRJyzegRyerwsL7FXWh0nyyO30znCHNENhYtb7wchke0bfk6TBJngLKrx4IXv5qDj%26typo%3D1&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397450727&sdata=gmJpxRcb2dBAGm0OJr3Wd1XZ%2FEO16CJdgaxnLyri7bY%3D&reserved=0>jemal...@ua.edu<mailto:jemal...@ua.edu>
[/var/folders/h2/r448cc4j4_v70yns10brx6r00000gq/T/com.microsoft.Outlook/Content.MSO/8434B70B.tmp]
From: The EDUCAUSE Wireless Issues Community Group Listserv
<WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>>
Date: Friday, October 9, 2020 at 4:13 PM
To:
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
<WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>>
Subject: [EXTERNAL] Re: [WIRELESS-LAN] Client roaming
Thanks for the links Mike. I’ve seen some of these before, but not all of
them. They’re definitely worth checking out.
From: The EDUCAUSE Wireless Issues Community Group Listserv
<WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>>
On Behalf Of Mike Atkins
Sent: Friday, October 9, 2020 4:33 PM
To:
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Subject: Re: [WIRELESS-LAN] Client roaming
While this is not an Apple specific thread, Dan Jones’ presentation at Wireless
Technology Forum on “Designing Wireless Networks for Apple” was very
entertaining/helpful in explaining the Apple roaming docs he referenced.
Several pointed out documented vs observed behaviors are not always the same.
Pertinent to this thread, the need for MacOS to see an AP at 12 dB better than
the existing connection before 5GHz roaming could be a factor. Probably not
the issue at hand, but some things to consider in the docs.
You should watch the presentation at
WTF20.COM<https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwtf20.com%2F&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C1%7C637382996397460722&sdata=VAkbsv%2Brt9IYO08EZZzdvOwPMot8VORZ%2B%2FYB2PHM1GM%3D&reserved=0>
or when it is posted to the CWNP YouTube
channel<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.youtube.com%2Fuser%2FCWNPTV&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397460722&sdata=G%2FK%2BAbHUhGoWwZPZoqPNz%2Fox%2B16e4bE%2BaH1OJnb40UA%3D&reserved=0>.
Here are the references from @UKDanJones presentation:
https://apple.co/3l4xqvs<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsupport.apple.com%2Fen-gb%2FHT202068&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397470710&sdata=i86Bz8lAbr2jMsweYcf8zT41yn7BDiy6gmti7mi1n04%3D&reserved=0>
- Apple Recommended AP Settings
https://apple.co/3ngM5FR<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsupport.apple.com%2Fen-gb%2Fguide%2Fdeployment-reference-ios%2Fiora86498d88%2F1%2Fweb%2F1&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397470710&sdata=uGyicKajFWX5YV6DfQrAk4LH2BTjCg8kgeMLt5mkKBg%3D&reserved=0>
- Creating Network Names For Your Wi-Fi Networks
https://apple.co/3jmbLhF<https://nam01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fsupport.apple.com%2Fen-us%2FHT203068&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397480709&sdata=H1KfNTiMZvE5ir6io6RYXnBCOFAvBtGXOpZolh1r1tg%3D&reserved=0>
- About Wireless Roaming For Enterprise
https://apple.co/2SdQA5F<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fapple.co%2F2SdQA5F&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C1%7C637382996397480709&sdata=PtR%2FN6ScrC9q%2FLZzMlWz8je%2Fc1nifbJ85SArO6SDg6I%3D&reserved=0>
- macOS Wireless Roaming For Enterprise Customers
https://apple.co/2HFn8TU<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsupport.apple.com%2Fen-us%2FHT202628&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397490705&sdata=n7QnIoyc%2F5qMLN0uscxFwjVJlyDT293NKhDaBa4kqEk%3D&reserved=0>
- Wi-Fi network roaming with 802.11k, 802.11r, and 802.11v on iOS
https://bit.ly/3iLFG2K<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.cisco.com%2Fc%2Fdam%2Fen%2Fus%2Ftd%2Fdocs%2Fwireless%2Fcontroller%2Ftechnotes%2F8-6%2FEnterprise_Best_Practices_for_iOS_devices_and_Mac_computers_on_Cisco_Wireless_LAN.pdf&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C1%7C637382996397500705&sdata=zqMPgMGPGTOnDqMjRQhBMD%2FPFaV4W8Q7h4ti7Lz266k%3D&reserved=0>
- Enterprise Best Practices for iOS devices and Mac computers on Cisco
Wireless LAN
https://apple.co/36msKwC<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fapple.co%2F36msKwC&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C1%7C637382996397500705&sdata=OMX4iu3%2BWwOpEwSWINbZRZVw7Nent4BvEiRf%2BmlXRmM%3D&reserved=0>
- Use private Wi-Fi addresses in iOS 14, iPadOS 14, and watchOS 7
https://apple.co/2GjOYVr<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fapple.co%2F2GjOYVr&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397510691&sdata=evxmcoR8yKvN4IfmRhzmJ%2BGVbWNpCuQNVh4nUaMxZgc%3D&reserved=0>
- Connecting Apple devices to 802.1X networks
https://apple.co/3cLBa1Z<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fapple.co%2F3cLBa1Z&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397510691&sdata=6rXvh%2Bd%2FkYaTwzenDBazZAN2DYuUi9zsXVqiG69%2B1xM%3D&reserved=0>
- Build Trust Through Better Privacy
https://bit.ly/2SgyQXb<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbit.ly%2F2SgyQXb&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C1%7C637382996397520687&sdata=x2%2FUmH1bzxysHnHPQc2KPFmqEbPTIVKBSofk%2FEsj0R8%3D&reserved=0>
- You Should Care About DHCP Option 51
https://apple.co/3jnEDWR<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fapple.co%2F3jnEDWR&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C1%7C637382996397520687&sdata=yxtzI4bTms0tRIBuh50O3zpSWiTh84IK%2BS9l00J2hvM%3D&reserved=0>
- How To Modernize Your Captive Network
Maybe it is just us, but we have lots of places where a 12dB delta is hard to
achieve when designing for dual 5G radio coverage at -65 dB. Clients end up
skipping an AP (or two) before actually roaming. Not to mention use case and
behavior differences between laptops and mobile devices like phones and
tablets. You might notice on a laptop Zoom session, maybe not with an iPhone
VoWi-Fi session. Our focus was on VoWi-Fi, thinking it was the more
challenging thing to tackle. Remote learning is challenging those assumptions.
Mike Atkins
Network Engineer
Office of Information Technology
University of Notre Dame
From: The EDUCAUSE Wireless Issues Community Group Listserv
<WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>>
On Behalf Of Jake Snyder
Sent: Friday, October 9, 2020 3:33 PM
To:
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Subject: Re: [WIRELESS-LAN] Client roaming
On thing to keep in mind is that iOS devices start behavior poorly when they
have no good option above -65. That’s the threshold they prefer 5GHz and when
you combine that with “hallway design” and “band select” you are asking for a
bad time.
Scenario:
Client doesn’t see 5GHz above -65. 2.4Ghz looks better, client tries to
associate and bandselect tries to send them back. Client doesn’t think 5GHz
meets its requirements, tries to associate on 2.4Ghz. Round and round they go.
If you need band select for devices like iOS that prefer 5GHz, you likely don’t
have enough 5GHz coverage, and trying to force them to 5GHz only results in
issues.
A better approach is to have at least 6db of transmit power more on 5GHz than
2.4. This makes 5GHz generally look more attractive so clients naturally pick
it, band select not needed. You can easily do this with TPC min/max settings.
Also keep in mind when looking at your survey reports. -65 is as measured by
the device, not your fancy sidekick or aircheck. Figure you need an extra
7-10db delta to overcome the limitations of some mobiles devices. That puts
you -58 to -55 as measured.
Sent from my iPhone
On Oct 9, 2020, at 1:08 PM, James Helzerman
<jarh...@umich.edu<mailto:jarh...@umich.edu>> wrote:
Best thing you can do for clients is have a 5GHz only SSID. We moved over the
summer to this with our main 802.1x network and it has fixed a ton of these
roaming issues and complaints of performance. Basically take the decision
making out of the hands of the client, give them only one band to choose from.
Band Select / steering may work but can lead to a lot of users issues as
roaming can break if the client doesnt take the hint to use 5GHz. Transitions
with real time applications like voice can be negatively affected.
For those on our campus that have 2.4GHz only devices, we offer eduroam in both
bands and have them use that then use AAA override to place them in the same
network as our branded ssid giving them all the same access to resources. Our
branded 802.1x, MWireless, has 95% of our user devices.
-Jimmy
--
James Helzerman
Wireless Network Engineer
University of Michigan - ITS
On Fri, Oct 9, 2020 at 12:03 PM Enfield, Chuck
<cae...@psu.edu<mailto:cae...@psu.edu>> wrote:
FWIW, I’ve been reluctant to assume this is a new problem. Usage patterns have
changed in the dorms and people are spending much more time using real-time
protocols than ever before. Those protocols make brief connectivity issues
very noticeable. It’s quite possible we’ve always had these problems, but they
rarely bothered users enough to make them open trouble tickets.
From: The EDUCAUSE Wireless Issues Community Group Listserv
<WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>>
On Behalf Of Michael Davis
Sent: Friday, October 09, 2020 10:49 AM
To:
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Subject: Re: [WIRELESS-LAN] Client roaming
We're an Aruba shop and only seeing it on iOS and MacOS devices.
On 10/9/20 10:44 AM, Mallon, Jason wrote:
I have not been able to pinpoint a device type as of yet. It seems to be
happening across all platforms including game systems.
Thanks,
Jason Mallon | Network Engineer III
<image001.jpg>
OIT
The University of Alabama
<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ua.edu%2F&data=02%7C01%7Ccae104%40PSU.EDU%7C2944732e79c4423356dc08d870754aa0%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637382996397530686&sdata=u6l2BWxBfAAd8vdjmNft0jQhrT3ocDJWEeSjRTUqH4s%3D&reserved=0>jemal...@ua.edu<mailto:jemal...@ua.edu>
<image001.jpg>
From: The EDUCAUSE Wireless Issues Community Group Listserv
<WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU><mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Date: Friday, October 9, 2020 at 9:40 AM
To:
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
<WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU><mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Subject: [EXTERNAL] Re: [WIRELESS-LAN] Client roaming
We’re an Aruba shop and have noticed similar behavior. We’re having more
incidents of intermittent connectivity issues this year than in previous years,
and most of those clients are making questionable roaming decisions. It’s been
really prevalent with iOS and MacOS. Much less on Windows and Android.
There’s always been problems with picking a good radio when those devices first
connect, but, historically, once they were steered to a good 5GHz radio they
stayed there. They’re not staying there this year. We haven’t figured out why.
Chuck Enfield
Manager, Wireless and Cellular
Penn State IT
814.863.8715
From: The EDUCAUSE Wireless Issues Community Group Listserv
<WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU><mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
On Behalf Of Mallon, Jason
Sent: Friday, October 09, 2020 10:30 AM
To:
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>
Subject: [WIRELESS-LAN] Client roaming
Wondering if anybody else is seeing this. We currently have devices doing a
lot of roaming between 5 and 2.4 radios, especially in the dorms. I would not
think anything of it normally, but they are moving from a -52 to -58 on the 5
radio to a -75 or worse on the 2.4 radio. This doesn’t seem to matter what
SSID they are connected to. Band select is enabled on all SSIDs. We are
running Cisco 8540 WLCs on 8.10.130. Most of the complaints are coming from
the dorms, so I am not sure if it is happening on our other controllers with an
older code level.
Thanks,
Jason Mallon | Network Engineer III
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OIT
The University of Alabama
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James Helzerman
Wireless Network Engineer
University of Michigan - ITS
Phone: 734-615-9541
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