Quick update - We now have a bug ID posted for this issue and Cisco Dev team is working on it. Hopefully it doesn't take forever for them to come up with a fix.
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvw23860 Jordan From: Cox, Jordan D Sent: Monday, October 26, 2020 10:38 AM To: [email protected] Subject: MacOS Disconnections on Cisco Controllers Good morning, We have been working with Cisco TAC to troubleshoot an issue where our MacOS clients will randomly lose connectivity to the default gateway (and thus internet etc.). The wireless will stay connected in the run state, but the Mac will send out repeated ARP requests for the default gateway during the outages. The outages last between 20 seconds to 5 minutes and is resolved once the client gets an ARP response from the gateway. We have packet captures showing ARP requests going through the CAPWAP tunnel to the controller but NOT leaving the controller to the gateway during the outages. TAC has acknowledged the problem is on the controller, and I'm waiting to hear back from them. I'm wondering if anyone else has seen similar issues? More details: * WLC is two 5508 in HA configuration * WLC was running 8.5.161.0 and we upgraded to 8.5.161.7 to troubleshoot * 250 APs are running in local mode (the issue does not happen when testing in Flexconnect mode with local switching) * Default gateway is a Palo Alto firewall * The MacOS client sends an ARP broadcast to find the gateway every 20 minutes but the outage doesn't happen every 20 minutes * It seems like the issue appears during high utilization on the controller since I didn't see any issues when testing over a campus break when many students were gone * I've seen the issue on multiple SSID's including a test SSID which only had my clients on it * Client debug on the controller shows no issues * This doesn't seem to affect Windows machines Thank you! [cid:[email protected]] Jordan Cox Network Admin II, Information Technology P: 651-882-3995 [email protected]<mailto:[email protected]> | www.unwsp.edu<http://www.unwsp.edu/> Equipping Christ-centered learners and leaders to invest in others and impact the world. ********** 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
