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)

What rates did you set for the ARP policing? Thanks Chris Hart [cid:image001.png@01D7A94B.455C09A0] Chris Hart Network Operations Engineer Lead Tel: 847-467-7747 Email: ch...@northwestern.edu 2020 Ridge Ave, Evanston, IL 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)

Hello All, I wanted to give you an update. First, I’ll provide a -We (UNC-CH) seem to be in a stable situation. Clients are connecting and staying connected. STM is consuming reasonable levels of resources. -We are blind. In addition to disabling the MM to MC communication, we had to disable

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 not too familiar with how Aruba handles arps, does it do proxy arp? I have seen Apple devices go to sleep before all broadcast/multicast traffic is sent by the AP, although that was 5 years ago. So I can believe that a behaviour change could cause increased ARPs if the devices aren't seeing

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 actually are allowing MORE ARPs. Apparently when policing kicks in, all connections are affecting. It can cause clients to freeze/not connect. So we actually turned the knob in the opposite direction. We were seeing counters to what amounts to large quantities of controllers pauses when

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)

After working with the Aruba TAC last night, these are the changes we made that appear to have corrected the issues we were seeing. Disabling Airgroup temporarily stops the issue with Queuing of the Arp packets. But the changes that we added below allowed us to re-enable Airgroup with APGroup

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)

HI Ryan, When you say that you detuned ARP policing, do you mean that the ARP policing on the underpinning network is now more aggressive (aka, dropping more ARP?) I ask because I’ve been wondering why we aren’t seeing this problem when other schools that made the same changes we did still

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)

Hi Chad, We have an 8 node cluster with roughly 3,500 to 4,000 users on each node. In this case “users” really means IP addresses the way they get counted. So in a dual IPv4/IPv6 stack client environment, a single user may show up as 3 “users” with the IPv4 address, IPv6 link local, and

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 have two cluster, one with issues and one without. On the one with issues we are seeing roughly 4500 clients per controller. On the one without issues we are seeing around 2000 clients per controller. From: The EDUCAUSE Wireless Issues Community Group Listserv On Behalf Of Street, Chad A

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 anyone who has applied the suggested fixes and are still having problems -- what are your client loads per controller? I am also very curious on any feedback for anyone who has applied the fixes and has also successfully enabled Airwave ( not central ) without issues reoccurring. Chad

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)

A quick update on where we are at. We had many of the same issues being reported and did the same workarounds. However, we ran into a few further issues that others might want to be aware of. We had one AP group that did not have our AP crash dump server configured and was using the

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)

Scott, I have heard it worked in several places, but we are like you. Put in all the recommended changes last night and it is still happening. -Original Message- From: The EDUCAUSE Wireless Issues Community Group Listserv On Behalf Of Scott Swartzentruber Sent: Friday, September

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 don't want to jinx anything but we've been able to keep the issues away for about 10 days now. In addition to the ACL changes we've also enabled the broadcast/multicast optimization, lowered our client rebalancing thresholds, and turn off SNMP for the most part. We're leaning to the client

Re: [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 had success in resolving the client drops we have been discussing? We had Aruba on the phone very early this morning - put the recommended ACL in place and did a a rolling restart of all 3 of our controllers. We only had to wait to our first class change to see a huge drop of

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!

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)

Just a quick update that might be good information for others to have. We were running 8.7.1.3 since June 10th with no issues until yesterday. We were seeing STM crash across several controllers and caused a significant outage in our wireless service. We did the same things others here were

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 had disabled "Prohibit ARP Spoofing" at one point to appease the 14+ code. The issue was resolved in a later release and we enabled it again. We are not currently seeing any issues 8.5.0.11, moving to 13 now. Thanks From: The EDUCAUSE Wireless Issues Community Group Listserv On Behalf Of

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 feel your pain, Patrick! Keep up the good fight. From: The EDUCAUSE Wireless Issues Community Group Listserv On Behalf Of Patrick McEvilly Sent: Wednesday, September 1, 2021 5:25 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else

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)

Don't forgot the nasty Lenovo vantage software  T.J. Norton Wireless Network Architect Network Operations (434) 592-6552 [http://www.liberty.edu/media/1616/40themail/wordmark-for-email.jpg] Liberty University | Training Champions for Christ since From:

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 hold off on providing details for now but when you have to push a code upgrade in the middle of the day on the first day class it’s been a rough day. We hit some major issues related to STM and then other fall out after doing the required code upgrade. We pushed the changes below at

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 speculating a bit, but Aruba does a lot of stuff with ARP if features like bcast ARP suppression, convert bacst to unicast, and BC/MC optimization are enabled. I assume Cisco has some similar features, but perhaps not all of them? Or maybe one key feature is causing most of the trouble

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)

Ryan, Do you have multicast enabled ?What is the mandatory rate you are using in the classrooms? We just had some issues with this not on Aruba . Bryan Tolka Sent from my iPhone On Sep 1, 2021, at 5:00 PM, Street, Chad A wrote:  Cody and all... We are also seeing STM spikes that are

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)

To all chiming in regarding the Aruba issues - thank you! I love seeing the collaboration and detail sharing. Chad - will be curious to hear if you push the band-aids to production and re-enable airwaves, if this helps your situation. -Cody From: The EDUCAUSE Wireless Issues Community Group

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)

Glad I brought this up. Is it possible that Cisco environments have evaded this? Seems as though the ARP flooding via iOS 14 would be something that would menace all the manufacturers. From: The EDUCAUSE Wireless Issues Community Group Listserv On Behalf Of Street, Chad A Sent: Wednesday,

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

Cody and all... We are also seeing STM spikes that are impacting associations. We have also disabled all our polling ( Airwave, Orion, etc ) and reduced the client load balancing thresholds so that we have around 4K clients per controller. This seemed to help a great deal. After working

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

This happened to us on the first day of classes. It's not your RADIUS. Some problem where, under load, users cannot associate to the AP. The STM process is overcommitted and can't respond appropriately. Aruba advised us to shutdown openflow and the next day the problem was gone. The next

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)

Please see my 12:05 response if you missed it. From: The EDUCAUSE Wireless Issues Community Group Listserv On Behalf Of Steve Smith Sent: Wednesday, September 1, 2021 12:00 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] [External] Re: [WIRELESS-LAN] Anyone else seeing

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 wouldn't mind seeing the arp limiting client filter as well. Thank you, Steve Steve Smith Network Administrator II Network and Telecommunications Services Aims Community College 970.339.6565 On Wed, Sep 1, 2021 at 9:57 AM Laramie Combs wrote: > HEy Chuck - would you mind sharing that arp

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

In our situation, we actually measure the packets over the wire to judge RADIUS response. I know precisely when I get a RADIUS timeout and what the average RTT as well as average response time for MAC and 802.1X authentications. So I believe out environment is clean. With that said, I am

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)

Hey Laramine/Chuck, The ARP issue most likely the Lenovo Vantage software or IOS 14. Another option outside of filtering is to enable prohibit ip spoofing and arp spoofing. T.J. Norton Wireless Network Architect Network Operations (434) 592-6552

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)

Here's what we did. We had a pcap that suggested only about 1% of clients would be affected by this filter, but it cut our ARP almost in half. We made the change last spring in our res halls which were almost fully occupied, and we've not traced user complaints back to this yet.

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

Thanks Brad! We noticed the same. And do the same thing for general connectivity - turn off randomization. The Crestron's, after the app is loaded and you go to screen share, (and all privacy settings are made) the client just times out and says, "unable to connect". Session table indicate

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

HEy Chuck - would you mind sharing that arp limiting client filter with me? We are seeing some new traffic patterns where it looks like user devices are just walking their subnets, and arping for everything -Laramie On Wed, Sep 1, 2021 at 11:47 AM Enfield, Chuck wrote: > We’ve seen the CPU

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

Same here, enabling arp filtering on the firewall helps greatly. T.J. Norton Wireless Network Architect Network Operations Office: (434) 592-6552 [http://www.liberty.edu/media/1616/40themail/wordmark-for-email.jpg] Liberty University | Training Champions for Christ since 1971 On Sep 1,

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

We've seen the CPU problem, but I don't think it resulted in Auth problems here. It may have and we just missed it because the more severe problems it caused masked them. BTW, in our case reducing the amount of ARP calmed the CPU. We applied a filter (Thank you Colin Joseph.) to limit the

Re: [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 have seen issues with the Lenovo vantage software causing to many ARPs, on top of the IOS 14 issues, that caused the STM process to crash as well. ARP inspection helped mitigate this quite a bit, but would randomly crash one of our controller due a select few clients hashing there. Ryan -

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

We're not having any unusual problems now, but we have in the past. Two suggestions I can offer are: * Search your controller syslog for "Authentication server request timeout". This will tell you if the controllers are sending auth requests and not getting replies back. We've had this

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 hearing issues of high cpu utilization for STM on the controllers causing issues. Maybe check your controllers and see if you are seeing the high cpu use for STM. Heard earlier today from our SE that Aruba has "identified the issue and is working on a fix." I suggest opening the TAC case so

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

Its been a while since I look at that. Would be a good path to check Thank you. From: The EDUCAUSE Wireless Issues Community Group Listserv On Behalf Of Michael Davis Sent: Wednesday, September 1, 2021 11:37 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Anyone else

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

So I should say that while I dropped the 515, most of these classrooms have 300 series. So that part isn’t generally related (or consistent to one model type). Ryan From: The EDUCAUSE Wireless Issues Community Group Listserv On Behalf Of Norton, Thomas (Network Operations) Sent: Wednesday,

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

Ian, iOS 14.0 introduced private MAC addresses. It was broken and devices spoke with both their real MACs and their private MACs. This caused the controllers to blacklist the devices for ARP spoofing. Once the timer expired, the device reconnected again for a while... 14.0 and 14.1 were broken

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

Is your backend (controllers - Radius) all jumbo frame clean?  We've seen issues with large EAP-TLS packets getting fragmented. We also had a specific OS8 release bug affecting AP-515s specifically, but it seems like we're in perpetual bug-chasing mode so I can't recall what version that was.

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

We’re on 8.6.0.11 and not seeing any issues currently, but also running 225/325s in the majority of our class rooms. We just purchased our first round 5xx access points and two of our LPVs are rung 535, 577, and 534s without issue on 8.7.0.4 Do you guys have the HE bit disabled? I know the

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

Same environment (6.x to 8.x) but no, radius is fine for us. We are on 535's with older 325/303's. (we are AOS 8.6.0.10 which seems -knock on wood -very stable) Our issue is with IOS 14.7 and Crestron Airmedia2's -I suspect the privacy settings are causing us issues. Same Apple hardware ~