So, I'd like to add some comments/questions to this discussion since I finally feel like I'm not alone in the world. Starting several months ago (mid December, I believe?) we started experiencing issues with our Meraki APs where clients couldn't connect to the WiFi... but they could. They would connect just fine, but their devices would fail to get DHCP leases. However, the experience for the clients is exactly as described: Everything is working fine, some clients sporadically drop connection and when attempting to reconnect the WiFi 'doesn't work'. We figured out early on that there were two things that could resolve this issue: Rebooting the AP that they were connecting to, AND/OR under "Client IP assignment" changing between 'Layer 3 Roaming' (what we've used since setting up Meraki years ago) and 'Bridge Mode'; Doesn't where it was set, changing the setting to the other, or changing it and changing it back would allow devices to reconnect. And I do mean 'AND/OR'; sometimes just one would work, sometimes the other, sometimes we would have to do both. I haven't tested them individually in awhile though, I just do both by default now. We have multiple Networks with APs, but only one is effected, and all the SSIDs of that Network seem to be effected. Because of the structure of our organization, most of the APs in our networks are all on the same management subnet, and assign addresses to the same DHCP ranges for our 'private' networks and our 'public' networks, but again only one 'network' is seeing these issues. I opened a support ticket with Meraki a few months back but they refused to move past the Event Log having entries of 'Multiple DHCP Servers Detected', but those 'errors' existed long before we had these issues and also all have the identical MAC address and are just pointing from the gateway to the IP Helper address, so I don't believe there are any issues there. Sorry if this is hijacking this thread, we've just been dealing with this for months and I finally found this thread after checking out the network health page and searching for one of the auth errors it gives. We're also using WPA2, and some SSIDs use Radius and some use PSK, so nothing solid there either. Also, the 'minimum bandwidth' on our SSIDs is all 11 or lower, and the majority of the devices having issues are brand new Surface Go tablets or Samsung S7/iPhone 8 (or newer) phones. We also had made no changes to our network structure, SSIDs, DHCP, etc around this time, so there was no trigger to the start that we were aware of... it just started happening one week.
... View more
