Sounds like a physical issue. Since you already changed the cable and tested on other switches, it could be a bad QSFP port or a loose connection. Try cleaning and reseating both ends. If it keeps happening after upgrading and rebooting, open a case for RMA. ... View more

Haven’t seen anything official yet, hopefully it’s something they add in the future ... View more

HI, also watch DHCP and ARP behavior too, especially if both AP types share the same VLAN. Seen a few cases where Catalyst kept old ARP entries after roaming, causing short drops before the refresh. ... View more

Seen this happen a few times on CS firmware as well. The switch keeps forwarding traffic but the management plane just stops replying, looks like the container crash Mloraditch mentioned. I’ve also seen it come back online after a reboot for a few days before it dies again, no clear pattern either. If you can grab logs right before the reboot you might catch the process restart event Switching to native IOS XE seems to be the only reliable fix so far, haven’t seen the issue again after that. ... View more