Same here, enabling arp filtering on the firewall helps greatly. T.J. Norton Wireless Network Architect Network Operations
Office: (434) 592-6552<tel:(434)%20592-6552> [http://www.liberty.edu/media/1616/40themail/wordmark-for-email.jpg] Liberty University | Training Champions for Christ since 1971 On Sep 1, 2021, at 11:47 AM, Enfield, Chuck <cae...@psu.edu> wrote: ________________________________ [ EXTERNAL EMAIL: Do not click any links or open attachments unless you know the sender and trust the content. ] ________________________________ 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 amount of ARP our wireless clients could send and it smoothed out the spikes. From: The EDUCAUSE Wireless Issues Community Group Listserv <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> On Behalf Of Cody Ensanian Sent: Wednesday, September 1, 2021 11:41 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: 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 they can track it better, and help them hone in on a fix better. We’re seeing the high cpu use on one of our controllers (but this controller also has higher client load). However, we have not had a flood of calls to our help desk for wireless issues (not saying they aren’t happening). Our SE also said if you’re experiencing the issue, disabling any system or process level debugging as helped, as well as disabling any SNMP polling. <image001.png> -Cody UCCS From: The EDUCAUSE Wireless Issues Community Group Listserv <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> On Behalf Of Turner, Ryan H Sent: Wednesday, September 1, 2021 9:27 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] Anyone else seeing any issues in the fall with large classrooms and delayed connection times (Aruba 8.5.0.13) This is a stab in the dark. With the University mostly shutdown since the Spring of 2020 (=not operating in standard mode and most people work from home), we got campus upgraded from 6.X to 8.X code base. We’ve also installed many 515 series APs. We are getting a large number of complaints in large classrooms that connecting to things like eduroam takes a long time. Looking into the connection, we see many incomplete RADIUS challenges. The general complaints are ‘we come into the classroom, and for some folks it can take up to 5 minutes to get connected’. The odd thing is that our RADIUS infrastructure is very large, polished and load shared, and we can see no performance issues with any of the RADIUS servers. We have begun reducing power in the large classrooms to make association issues better, but so far that hasn’t changed much. We anticipate opening a ticket with Aruba, soon. We do seem to see the most complaints in the big classrooms. But I do keep going back to the RADIUS Challenges incomplete. I know if no reason for those not to complete unless the connection is broken midway. Has anyone else seen something like this? Ryan Turner Head of Networking Communication Technologies | Information Technology Services r...@unc.edu<mailto:r...@unc.edu> +1 919 445 0113 (Office) +1 919 274 7926 (Mobile) ********** Replies to EDUCAUSE Community Group emails are sent to the entire community list. 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