Hi, I had a similar issue with DELL Optiplex stations running Windows 10: the DELL station was reusing the same PMKID when roaming from one AP to another AP , or when switching between the 5 GHz and 2.4 GHz spectrums on the same AP. This behavior does not meet the 802.11 standards and was causing client disconnections and reconnections for a few seconds with incident in APs logs Invalid PMKID and the client was disconnected (correct behavior is : AP#1 PMKID #1, AP#2 PMKID#2, if client roams back from AP# 2 to AP# 1 it can reuse the PMK#1,  then from AP#1 to AP#2 it can reuse PMKID#2 ) After upgrading the same station to Windows 11, the issue was resolved. The PMKIDs were different while roaming, as expected. Hope this helps. ... View more

Oh I think I mistook the 450 for the 425 sorry! But because Meraki uses standard QSFP DACs I think it should work. It won't be supported though. ... View more

Thanks Dan. The packet captures shows no issues with 802.11v. It seems the issues seem to be MacBooks which is wearied as apple Imacs and other iOS devices are fine. ... View more

When our ISP changes their MTU to 1500 on the customer handoff interface of the NID, errors start coming up. ... View more

LACP isn't supported on the MX. But there are topologies that Meraki recommends with Spanning-Tree: You can find them in their documentation:  https://documentation.meraki.com/MX/Deployment_Guides/MX_Warm_Spare_-_High_Availability_Pair#:~:text=USB%20cellular%20dongle.-,Recommended%20Topologies,-There%20are%20two ... View more

Thanks guys, there was a upstream firewall blocking some ports, can this resolved and switches upgraded and no longer reboot. ... View more

You don't need to apply different vlans for different passphrases, they are separated from each other already, its by design. Think about the WPN as a perfect solution for hotels where every room gets their different password. Now for example a chromecast that you would connect to the TV, or the built in smart TV would be visible for all devices that use the same password. In normal circumstances this is not possible when you use an client isolation. ... View more

Dude, I am SO with you on that one....been playing ISE since v1.3 (yes I am OLD) and it's a far superior system! ... View more