We have a small installation of 515s running 8.5.0.5 and have experienced the same behavior that Keith described. So far, mostly anecdotal data but we are starting to gather data and troubleshoot this with Aruba as well.
Amel Caldwell University of Washington From: The EDUCAUSE Wireless Issues Community Group Listserv <[email protected]> on behalf of "McCurry, Barry A" <[email protected]> Reply-To: The EDUCAUSE Wireless Issues Community Group Listserv <[email protected]> Date: Friday, January 17, 2020 at 11:33 AM To: "[email protected]" <[email protected]> Subject: Re: [WIRELESS-LAN] Update on our Aruba solution Do you mind sharing what version of code you are running currently? I think you mentioned 8.5.0.3 in the initial thread, but you mentioned the upgrade to 8.5.0.5 was recommended by Aruba. I would be curious to know if the tiger team saw these issues on 8.5.0.5, as we just upgraded to this version over the break. From: The EDUCAUSE Wireless Issues Community Group Listserv <[email protected]> On Behalf Of Turner, Ryan H Sent: Thursday, January 16, 2020 4:10 PM To: [email protected] Subject: [WIRELESS-LAN] Update on our Aruba solution All, Since the thread generated significant interest last week, I wanted to let you know how Aruba responded. After hearing of our issues, Aruba sent a tiger team (5 or 6 folks) that came in to work on the bugs. We had a punch list of things to work on. On the top of the list was the 515 performance issues. This is where people would stay connected, but data wouldn’t flow for a period of time. The symptoms were reproduced many times during the week with everyone present. Aruba found a bug in code that does not handle queuing properly in certain circumstances. They produced code to fix this issue, but we cannot confirm at this time if this will resolve what we are seeing…. We saw a similar symptom immediately after putting the fix on the AP. After seeing the same symptom immediately after putting on the hotfix, they realized that someone on the team has an intel AX adapter which has significant issues with OFDMA. It can essentially wreck the airwaves for other clients. The solution is to TURN OFF OFDMA on AX access points until Aruba releases a build that can selectively ignore Intel OFDMA (while allowing others). I have a release from Broadcom on January 6 speaking to this issue, so they aren’t making that. I confirmed it with a separate wireless vendor that Broadcom has had some issues on the OFDMA front. I plan on keeping it off for likely the next year as we don’t really have a significant quantity of ax clients to make it work the hassle at the moment. ********** Replies to EDUCAUSE Community Group emails are sent to the entire community list. If you want to reply only to the person who sent the message, copy and paste their email address and forward the email reply. Additional participation and subscription information can be found at https://www.educause.edu/community<https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.educause.edu%2Fcommunity&data=02%7C01%7Cbarry.mccurry%40VANDERBILT.EDU%7C8b9111dc79ef499763e408d79ad0da24%7Cba5a7f39e3be4ab3b45067fa80faecad%7C0%7C0%7C637148094119719983&sdata=2R4CJbj2T499%2BahzOlZpXhRGDSubYD8bY83PV%2BmmaeM%3D&reserved=0> ********** Replies to EDUCAUSE Community Group emails are sent to the entire community list. If you want to reply only to the person who sent the message, copy and paste their email address and forward the email reply. Additional participation and subscription information can be found at https://www.educause.edu/community ********** Replies to EDUCAUSE Community Group emails are sent to the entire community list. If you want to reply only to the person who sent the message, copy and paste their email address and forward the email reply. Additional participation and subscription information can be found at https://www.educause.edu/community
