I actually tried with four computers, two corporate and two personal, Its funny how the issue was causing. -two Personal laptops no issue at all, works with corp-SSID[only preshared-key] -Corporate laptop, gives issue connecting to CORP-SSID[Radius Authentication] and CORP-SSID[PSK] -removed all 6 AP from the network and put it back after 5 minutes, corporate laptop started to work, after 30 minutes, when AP started moving user from one AP to other, issue again. -deleted the IP lease from the DHCP server, cleared Ip from windows[ipconfig /release], i see User machine is getting dummy IP[169.254.XX.XX] -got the meraki support in the call, he started doing a packet capture on the uplink of the meraki Switch connecting wan router, in less than a minute, whole site Internet Access and Phone went off the air. Including connectivity of all Meraki Devices from that main site to the dashboard -DNS server which was directly connected to the same Meraki Switch was dropping external DNS return packets, and Internet wasn't working for all the users in the network, as that is the primary DNS server, another strange thing internal DNS was working -i proved customer that from PaloAlto which is in DC and MPLS internet link is not dropping DNS packets, DNS server in the DC itself was able to resolve external FQDN from it. -after one hour of troubleshooting, narrowed problem is no where else but the meraki distribution switch, customer agreed to reboot distribution meraki Switch from which Meraki Support engineer did a packet capture. service was restored as soon the switch was power cycled. -Now old issue re-surfaces, IP phones locked out, when rebooted it stops at 40% as it is waiting for DHCP servers to assign IP address - last year around October, Meraki engineering team found this as a bug, and applied a temporary fix, seems they had informed customer that rebooting may remove that fix from the switch. -customer increases the DHCP scope from 100-200 to 100-250, couple of phones immediately restored as it gets the new IP, but the DHCP statistics in the DHCP server shows instantly, 0% IP address available[somewhere this IP is being assigned or Switch sucking up all the IP address from that Phone Vlan and dropping it] -ringed Meraki support, this engineer checks the switch and confirms code is still in the rebooted switch but good idea to upgrade the firmware and check if that fixes the problem. =================== This was a kind of whole story yesterday...
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