Hello everyone.  My apologies if this ends up being a duplicate post - my first post disappeared for some reason. I'm having an interesting issue with a variable number of AP's failing the "Layer 3 Roaming Test" on our primary SSID.  We just deployed a full Meraki network (MX, MS425, MS250, MR30H, MR46) to our university's Residence Hall network.  We have about ~675 AP's deployed, and, the SSID in question is configured for Layer 3 Roaming.  We have a VLAN per room, setup with VLAN tagging, so students get a "home" VLAN when they connect their devices in their rooms.   In any event, when we run the Layer 3 Roaming test, a random number of AP's, between 12-34, are "unreachable".  If you run the test 5 times in a row, you can get five different numbers of AP's that are unreachable.  It's the same ones over and over, but sometimes they get removed from the list, and sometimes re-added.  If you check each individual AP in the dashboard that is "unreachable", they are online, fully functional, and have no issues.  Nothing of interest in the event log.  The APs are already on switches that have AP's connected that are reachable on the Layer 3 Roaming test at all times.  So far for troubleshooting, we've restarted AP's, re-tagged the AP's, re-configured switch ports they are connected to, and deleted and re-added the interfaces they are using in the dashboard.  So far none of those steps has resolved the issue. We've opened a TAC case, but was hoping for some feedback on how to proceed on my own as well.  This one has me really stumped, and I've tried to do some research on "Layer 3 Roaming Test" failures and haven't found much.   I'm open to any suggestions - and let me know if I need to provide any other information that might help the community better understand this problem. ... View more

Hello all.  First time poster here! 😀   We recently deployed a ~675 access points (MR30H) at our university in a Residence Hall network upgrade.  We configured the SSID's to be in Layer 3 Roaming Mode.  When running the Layer 3 Roaming Test, I randomly get anywhere from 18-34 A/P's as "unreachable".  Nothing notable in the event log(s) When I check on each individual A/P listed, they are online and not having issues.  It seems to be the same A/P's that show up on the test, but if I run the test say 5 times, I'll get 5 different numbers on what's unreachable, and some drop or are added to the list each time - never more than 34 A/P's have failed the test.   One notable item in our configuration/setup is each MR30H is offering it's own VLAN (VLAN-per-room) to clients, but I don't believe that would be a factor here - I would expect if that was the cause it would be an all-or-nothings type of scenario with the Layer 3 Roaming.   I've rebooted the A/P's, re-tagged them, deleted and re-created the interfaces they were connected to, and checked the switch port configurations the A/P's are plugged into, and nothing sticks out.  Each of the A/P's that are "not reachable" on the test are connected to switches where all the other devices are reachable by the test.  The entire network is Meraki (MX450 security appliances, MS425 "Aggregate", and MS250 "Access"), and our basic implementation plan was reviewed by our Meraki sales/engineering team and our MSP before deployment, and all seemed okay.   I've opened a support case for this, but wanted to get some feedback to see if others have seen this, and any troubleshooting tips while I communicate with TAC on this.  Perhaps this is just a bug? Thanks in advance! ... View more