I have 1 MX84 and 12 MS120-24P switches that I'm setting up for a new install. MX84 is doing the L3 Routing and has 7 VLANs defined on it. Switches 1-6 are in one rack and Switches 7-12 are in a second rack. Switches 1 and 7 are used as "Distribution Switches". Switches 1 and 7 Trunk Ports to Access Switches do not have any STP Guard enabled. Switches 2-6 and 8-12 Are "Access Switches". Switches 2-6 and 8-12 have uplinks to both Switches 1 & 7 which are configured as TRUNK ports on Native VLAN 1. Switches 1 & 7 each have a single uplink to a single MX84 which are configured as TRUNK ports on Native VLAN 1. Switch 1 has a root value of 0 and Switch 7 has a root value of 4096. Switches 2-6 & 8-12 have a value of 32768. On September 22nd, our DSL Internet Link went down. On September 24th, the DSL router was rebooted. Once the MX84 came online, Switch 1 flooded the network with broadcast traffic to all the switches, creating a broadcast storm. All the switches went offline and didn't come back up until I rebooted Switch 1. (Meraki Support is stating this is what happened.) Has anyone run into this before? We're running 10.35 on the switches. Meraki had me do port mirrors from all the uplink ports on switches 1 & 7 to an access port on those same switches. They asked me to disconnect the WAN link to the MX84 for 24 hours and then connect it back to see if we can replicate this issue.
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