Hello All We are in process of migrating over to a complete Meraki Switch site. We started about a month ago and have our main areas mainly done already - Close to 60 switches, with about 40 already deployed. We are upgrading from OLD HP/Aruba switches of various models /ages We have run the approx 40 switches already deployed for about a month but in the last week and a half we have been seeing Very high STP on ports - and then during the day, we start to see switches alert and say DNS is misconfigured. This is when the network crashes hard and we lose the network across our whole site, i.e no internet no access to servers, etc. We have an MS425-32 set as a core switch with L3 configured - this then connects to other MS425's as distribution switches that have MS225 connected to them. We also have some MS125-24/48's and MS120-8FP's connected. We can see various ports on various switches turn orange and give the Very high or High STP errors on the ports. The only way we have found to clear the issue is to reboot the Core, Main Distribution Switch, and also a stacked Switch (that connects to our cisco Blade serves and storage devices that house all our servers) Once we do this and "Clear: the STP errors the network comes back and the switches return to normal Green connection We have the switches set for static IP's on Vlan 99 ( our Management VLAN) with DNS set to 8.8.8.8 and IP for our Firewall. Wondering if anyone has seen this before? and shouldn't Meraki's shut down ports instead of taking the network down, it's like the Meraki will not recover itself without a reboot. For FYI RSTP is enabled globally and some ports do have root Guard enabled depending on the endpoint connected, with a mix of Trunk and Access Ports Sorry for the long-winded explanation 🙂
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