Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

Sorry I’m late to the party.  I got ahold of a great tech at Aruba last night.  We finished up with his suggested work-arounds 2-3 hours before the advisory came out. Implemented the client rebalancing threshold change, also at the seemingly popular 15% Turned on ALL the broadcast/multicast

Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

But you tested in your lab, right? I love that one… put new code on a couple of APs, or even a few dozen. That’s supposed to somehow indicate what will happen at bigger load… and also maybe implies the vendor didn’t do their own “similar lab testing”… “You should have tested before upgrading

RE: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

I’d like to suggest sending them home, but if we learned anything last year it’s that home wi-fi isn’t so great either. How many times have you heard, “It works when I’m at home?” Well now we know, not always. From: The EDUCAUSE Wireless Issues Community Group Listserv On Behalf Of Floyd,

RE: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

JD, If we wrap each of them along with their devices in an aluminum foil bubble, each user would have their own collision domain. The MIMO reflections would be awesome, we wouldn’t need more than a single channel architecture, and any channel contention would be self-imposed. Here’s hoping we

Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

“That's been my experience for years. The network works great when there are no students around. My working theory is that students emit RF interference, but research ethics won’t let me run the tests, so we'll never know for sure.” It’s worse than that! They are walking bags of water which

RE: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

I will also add that our problems did not increase linearly with client count on a controller. Below 5K there was no user impact. Around 5K problems started and the severity increased quickly. I doubt there’s anything magic about 5K, and the threshold will be different on every network based

RE: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

We are on 8.7.1.4 with 6,300 WAPs and 6 controllers. We had to upgrade to 8.7 because of the newer model of WAPs ___ Rita Barrantes, PhD, PMP Director, Technology Services and Support Networks and Telecomm | IT Assessments 832-842-4702 |

RE: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

Nayef – that’s what we did. Down to 15% ___ Rita Barrantes, PhD, PMP Director, Technology Services and Support Networks and Telecomm | IT Assessments 832-842-4702 | rbarran...@uh.edu [cid:image002.png@01D79FE6.EC8BFA50] From: The EDUCAUSE

Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

Any chance you could be experiencing the issues outlined in today's advisory? https://mail.google.com/mail/u/0?ui=2=b16ec71188=0.1=msg-f:1709803220174325554=17ba70f8464f4732=att=inline On Thu, Sep 2, 2021 at 10:20 AM Enfield, Chuck wrote: > Between 5k and 6k clients on a 7240xm is where we

Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

Between 5k and 6k clients on a 7240xm is where we started seeing problems. Lighter loaded controllers were OK. From: "Street, Chad A" Sent: Thursday, September 2, 2021 11:03 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] [External] Re:

Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

We currently aren't experiencing this issue but these symptoms (stm crashes, controller crashes) were identical to the issues we saw in early 2019 (8.5.0.1) An aggressive rebalance of users/ap's (and eventually an upgrade to 8.5.0.3) fixed this for us. I mention this because we are currently

Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

We were seeing one of our cluster members taking on ~7000+ active clients while two others were in the low double digits. Our previous threshold was at 50%, which seems to have previously been the default. Once we adjusted our thresholds down to 20%, we saw improvements. We then went down to

RE: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

We are experiencing the same issues. We rebooted this morning. ___ Rita Barrantes, PhD, PMP Director, Technology Services and Support Networks and Telecomm | IT Assessments 832-842-4702 | rbarran...@uh.edu [cid:image001.png@01D79FE2.62D01BB0]

Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

We are a balanced cluster, notes about load below: "I’m also noticing that there are much fewer clients on this controller, and that ratio doesn’t seem to be improving." To this point, the action we took that seemed to help the most was adjusting our active client load balancing threshold.

RE: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

For those of you who have experienced this, what was your user load and how were your clusters operating (balancing, active/standby) ? I wonder if there’s a threshold.. Thx! From: The EDUCAUSE Wireless Issues Community Group Listserv On Behalf Of Smith, Nayef Sent: Thursday, September 2,

Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

"I’m also noticing that there are much fewer clients on this controller, and that ratio doesn’t seem to be improving." To this point, the action we took that seemed to help the most was adjusting our active client load balancing threshold. We dropped it significantly to force clients to

Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

Lee, don’t you bring your bad Cisco-juju to this conversation! :-) Now that Lee has been properly handled, this is probably a great opportunity to say ‘hello’ to the greater list. Hello! Last night, we (UNC) restarted the controller used to test the firewall policy. Despite Aruba’s advisory,

Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

We see about 28K devices peak and so far haven't seen the issue crop up.  We did just upgrade to 8.7.1.4 just before the Semester begun, because we were getting smacked by the false radar detection bug that was causing AP reboots. On 9/2/21 8:50 AM, Rob Harris wrote: Has anyone seen any

RE: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

When we had the problem last year, we couldn't see the high CPU usage much of the time. The best way to tell if it's crashing is to look at the service uptime. If it's been up for days or weeks you probably don't have the problem. Hours, then you probably do. -Original Message-

RE: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

That's been my experience for years. The network works great when there are no students around. My working theory is that students emit RF interference, but research ethics won’t let me run the tests, so we'll never know for sure. -Original Message- From: The EDUCAUSE Wireless Issues

Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

Speaking from experience, I would be very concerned. We had no issues until students returned and we went downhill from there. On 9/2/21, 8:50 AM, "The EDUCAUSE Wireless Issues Community Group Listserv on behalf of Rob Harris" wrote: Has anyone seen any details regarding what they

RE: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

Has anyone seen any details regarding what they consider "Large" environments? We upgraded during the break, but both before and after versions are affected. We didn't notice this happening before, should we be concerned now? The "dropped" is 0 and the stm cpu usage is in single digits, but

Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13)

FWIW, Aruba just posted an advisory regarding this issue: Aruba Support Advisory ARUBA-SA-20210901-PLVL04, "Wi-Fi Client Connectivity Failures in Large Client Environments" Good luck to those of you hit by this. My students start coming back this weekend so I'll be watching this closely!