Meraki spanning tree issues. Understand common issues that Are all switches set to RSPT? Like for instance the meraki would be by default but a Cisco catalyst 2960 would be using the older standard SPT. You probably already know: ** Configuring Spanning Tree on Meraki Switches (MS) - Cisco Meraki Documentation In the other deployment where I had a mostly homogeneous Meraki network, I still had to disable spanning tree on the port to our ISP uplink and make sure our MDF stack was root or we saw Issue: Meraki switch is CST root, and adjacent to MST cloud. If you do go Hi, I have noticed that spanning tree always see in event log in some of my switchport eventhough the connected device is Meraki MR. Network-wide STP settings, including enabling RSTP and setting the bridge priority on MS switches, can be configured in the Meraki Dashboard. Choose one switch to be the core, make it the We just recently replaced a L3 cisco switch at one of our sites with a new L3 @Cisco_Meraki_1 Switch. If your L2 switch is trying to Loops: Finally you might have an intermittent loop causing the problems. Since doing so, one of our access switches is setting itself as the RSTP root (we want this to be the Learn more Meraki Dashboard tools that aid with troubleshooting of Meraki networks in general, such as the client page, packet capture, event log and topology page. Do this; do you still see the STP issues? This would be confirmation They kind of design looks great on paper but usually ends up in spanning tree hell with the occasional unplanned outage due to spanning tree issues. Port level STP settings, including enabling or disabling Make sure that you have your spanning tree on all your switches set to the same one, preferably RSTP (as it’s quicker to converge after topology changes). Other vendors may have quirky ways they implement Configuring Spanning Tree on Meraki Switches (MS) I tend to use root guard at the MS425 downlink and STP guard set to disabled on the lower priority MS250s or MS350s uplinks. P2P connection between (Meraki) CST root and MST switch root is STP flapping because You can ask Meraki to enable the option to disable AP meshing. Is this normal? or I At the global level, you enable BPDU guard on Port Fast-enabled STP ports by using the spanning-tree portfast bpduguard default global configuration command. Issue: Meraki switch is CST root, and adjacent to MST cloud. 1w) are both standards-based protocols. They replaced some really old Cat 2960's. Do ports 7 and 8 have APs plugged in? Otherwise what is plugged into those ports? I am on shard n85 and it seems to be For further mitigation today I added "spanning-tree guard root" to all ports on the Catalyst 6509 and added this to the config: spanning-tree portfast edge bpduguard default I'm hoping this will Before Meraki said it was a POE issue and they'd replace it, I was told: I see that there are no bridge priorities set in the switch network, therefore, we are seeing a lot of STP events in the This is essentially Rapid Spanning-Tree. We decided to stack the Meraki switches and trunk them to the Apr 16 2025 1:24 PM I would fundamentally change your design. The MS series supports these protocols for maximum interoperability with other vendor Network-wide STP settings, including enabling RSTP and setting the bridge priority on MS switches, can be configured in the Meraki Dashboard. Please make sure for interoperability with any other non-Meraki platforms, to either run Rapid Spanning-tree or MSTP (not PVST or any iteration, nor Hi all - I had to install some new Meraki MS250 access switches over the weekend. Spanning tree (IEEE 802. Spanning tree shuts down STP ports that . P2P connection between (Meraki) CST root and MST switch root is STP Since Meraki switches don't run PVST and they only run STP/RSTP which mean these two protocols are not VLAN aware you could face some issue if you run into a scenario like the You can ask Meraki to enable the option to disable AP meshing. Port level STP settings, including enabling or disabling RSTP on a port and configuring STP guards, can also be configured. 1D) and Rapid spanning tree (IEEE 802. Do this; do you still see the STP issues? This would be confirmation Spanning tree events like that are often caused by AP clients roaming. I would not plug two switches into an MX.
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