I've seen this on RAPs with SSIDs operating in split-tunnel mode and "possibly" bridge mode with Android Clients - but I occasionally saw this with 8.3.0.7 and 8.5.0.9 and 8.5.0.11. Issue was somewhat intermittent and semi-replicable with TAC - but ended up having to close the case as troubleshooting wasn't really going anywhere and replicating the problem reliably at times was frustrating and we only have 1 or 2 RAPs for myself and a couple other network staff members.
My theory at the time was there was some "defect/disconnect" between the AP and it's "Drop Unknown Multicast/Broadcast Logic" - because although I could see "DHCP Offers" via the Datapath of the Controller downstream - I wasn't seeing these DHCP Offers via an Air Capture (Open SSID was one of the troubleshooting steps we performed) - and in reverse - at times where I saw the "DHCP Request" from the Client during an Air Capture - the DHCP Request never hit the Datapath of the Controller. But again - this was only on Remote APs operating in Split-Tunnel Mode. So not sure if that helps. Christopher Johnson Wireless Network Engineer Office of Technology Solutions | Illinois State University (309) 438-8444 Stay connected with ISU IT news and tips with @ISU IT Help on Facebook<https://www.facebook.com/ISUITHelp/> and Twitter<https://twitter.com/ISUITHelp> From: The EDUCAUSE Wireless Issues Community Group Listserv <WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> On Behalf Of Jerry Bucklaew Sent: Thursday, July 08, 2021 12:02 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] ArubaOS 8.5.0.9 Clients not getting an address [This message came from an external source. If suspicious, report to ab...@ilstu.edu<mailto:ab...@ilstu.edu>] To ALL: We are experiencing and issue on our aruba os 8.5.0.9 code and I am wondering if anyone else has seen it. Starting this week we have had complaints of users not getting an ip address. It seems to be isolated to two buildings for the most part. On the dhcp server we see the discover and offer, but never a request. On the controller packet capture we see the same thing, discover and offer but no request. On a client side packet capture we see discover but no offer. It seems to be ap related and a reboot of the ap seems to fix it, sometimes we have to reboot many ap's as a bunch in the same area have the issue. For those with netinsight the insight, "no dhcp request after offer" seems to catch it. For now it is only affect about 50 people out of 5k so a small number. But it also seems to be affecting about 50 Ap's out of 6k, so again a small number. But we really have not confirmed that it is the ap. We have confirmed that a client on the same ap will continually have the problem no matter how many times we reboot him or de-auth him. We have confirmed that many times if we get him to go to a different ap/location it does seem to clear up. So again, just wondering if we are the only ones or if someone else has seen this. ********** 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://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.educause.edu%2Fcommunity&data=04%7C01%7C%7C06582cb341a14b4d24c208d9423216a4%7C085f983a0b694270b71d10695076bafe%7C1%7C0%7C637613605161868119%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=2BgAQwXva%2BZCmyJa1ovqe1rk990MjnZ2CsJdNm0I1zY%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
