It has been a while since I last did a MIBwalk of an MX67, but the following OIDs appear to show the up/down status on each of the 5 ports for the MX.  1.3.6.1.2.1.2.2.1.8.1 to 1.3.6.1.2.1.2.2.1.8.5 where a value of 1 = UP, and 2 = DOWN.  There do not appear to be any counters for time in an MX that I have found, sadly.  Uptime counters exist in Meraki switches, just not in MX's or AP's.  For a dual connected device if you were watching these values, you would see if the adjacent device was disconnected.  But this may not tell you there is an upstream issue causing data not to transmit.  But there are similar OIDs that show traffic is passing on the interfaces, if you see a counter is no longer incrementing that would likely be your best option for monitoring issues.  This is provided you don't mind using SNMP and getting into the weeds a little bit.  To play with SNMP use SNMPview 2.5 and/or Paessler SNMP Tester software.  Both are easy to setup. ... View more

We do have a mix of MR32/33 and MR45/55 in place. The building that we receive the most feedback is running only MR32/33, so if that's still an issue on those older devices, that would make sense. Our main building is a mix of MR45/55 with 1 MR32. I have not taken note whether users are having the same issues in the main building, but I'm looking into that today. Thinking through whether I upgrade to 29.4.1 or roll back to 26.6.1...    Thanks for your feedback! ... View more

Wow! Long thread. Had very similar symptoms.   My problems started after noticing that one of our SSID had legacy WPA authentication configured. Changed it to WPA2/WPA3 but that forced users to reauthenticate and flooded the support desk. Word to the wise, always send a notice first...cuz users.   Anyways, I've put the settings back were they were and all came back as before, except for a few clients experiencing the occasional disconnect or not being able to connect with their cell phones.   However, I had forgotten to put back ONE settings that, at the time, I thought, hey, let's try that...   802.11w https://documentation.meraki.com/MR/WiFi_Basics_and_Best_Practices/802.11w_Management_Frame_Protection_MFP Had left it enabled. Disabled it and all my problematic clients reconnected fine. This thing is over 10 years old and does not seem to play well with others. So still on WPA and no 802.11w. I know...   Thank you. ... View more