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