Thanks Gertjan for sharing this information. I am going to look into this bug and let the TAC take notice as well.
- Cheers, Kind regards, Tariq Adnan | Senior Network Engineer ICT, Campus Network Services THE UNIVERSITY OF SYDNEY 316 Abercrombie Street, (G17) | The University of Sydney | NSW | 2006 T +61 2 8627 7885 | M +61 478 492 080 E tariq.ad...@sydney.edu.au<mailto:nadia.berto...@sydney.edu.au> | W http://sydney.edu.au<http://sydney.edu.au/> From: The EDUCAUSE Wireless Issues Community Group Listserv <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> On Behalf Of Gertjan Scharloo Sent: Friday, 24 July 2020 6:32 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Cisco 3800 AP code 8.10 wireless disconnections/drops Importance: High Hi , Please aware about bug : CSCvu61194<https://tools.cisco.com/bugsearch/bug/CSCvu61194> : AP 2800/3800 sends burst of RTS and BAR randomly leading to low client data rates Symptom: During normal operation, randomly we see bunch of RTS/BAR packets being sent from the AP to the client. This leads to lower data rates or packet drops in the network. Customers might also see quality degradation issues with Webex/Skype/MicrosoftTeams audio/video https://www.cisco.com/c/en/us/support/docs/wireless/wireless-lan-controller-software/200046-tac-recommended-aireos.html#anc10 Bug is fixed in 8.5.161.6 -> The CCO 8.10 releases, up through 8.10.122.0 is also effecting. Issue is fixed in 8.10MR2 Escalation code Regards, ICT Services Netwerkbeheer - draadloos Gertjan Scharloo ICT consultant _____ Universiteit van Amsterdam | Hogeschool van Amsterdam Leeuwenburg | kamer A10.20 Weesperzijde 190 | 1097 DZ Amsterdam Tel: +31(0)20 525 4885 Mobiel: +31(0) 61013-5880 www.uva.nl<http://www.uva.nl/> uva.nl/profile/g.scharloo https://time.is/nl/CET Je kunt mij ook bereiken via Skype for Business [cid:image001.png@01D37B11.F4E316A0] Van: The EDUCAUSE Wireless Issues Community Group Listserv <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Namens Tariq Adnan Verzonden: Friday, July 24, 2020 4:18 AM Aan: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU<mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Onderwerp: [WIRELESS-LAN] Cisco 3800 AP code 8.10 wireless disconnections/drops Hello everyone, Just checking if anyone else is experiencing the wireless disconnection issues like us. So far we have received complaints from multiple sites where we have deployed 3800 model AP on 8.10.121.0. The 3800 on a different controller running code 8.5.161.4 seems to have no issue so far. The drop outs are very random and sometime would happen in the middle of a zoom meeting - very frustrating for students during lecture. I have raised a TAC case and we couldn't reproduce the issue during 1.5 hours troubleshooting session. I am suspecting below bug but unless we recreate the issue and take some logs, Cisco won't recommend any workaround or code upgrade: CSCvt22353<https://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fprotect-au.mimecast.com%2Fs%2Fv4EjCL7EwMf43ozMc11Fat%3Fdomain%3Dtools.cisco.com&data=02%7C01%7Cg.scharloo%40UVA.NL%7C75f61532a6344f78b6bc08d82f77cca8%7Ca0f1cacd618c4403b94576fb3d6874e5%7C1%7C0%7C637311538874423741&sdata=eOsW%2BbAAv45rHAp5bNOcm5agsWHe3u2%2BSW2D5v1NHVE%3D&reserved=0> 2800/3800/4800/1560 APs not sending DHCP messages over the air >From bug details: "From AP debugs and OTA captures, we can see some traffic exchange, but at some point AP stops transmitting data frames over the air (could be DHCP, or ICMP, or other data traffic), affecting all clients connected at that time." Thanks, - Cheers, Kind regards, ********** 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://eur04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.educause.edu%2Fcommunity&data=02%7C01%7Cg.scharloo%40UVA.NL%7C75f61532a6344f78b6bc08d82f77cca8%7Ca0f1cacd618c4403b94576fb3d6874e5%7C1%7C0%7C637311538874433734&sdata=mTatkIxEAJsyMge%2FMLsJeFYnNuftvkPy42C05YmgOeU%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
