Hi all, we run a meraki network with 52 MS3350 access switchs and 2 MS425 cores for LACP uplink to our data center. From time to time (every 2-3 month) we see a lot of CRC errors on all MS350 uplink ports connectes to Core1. The switches connected to Core2 do not show errors, so network keeps running. Core1 does not show any issue. Most of time we reboot Core1 and everything is fine again. Yesterday it happened during night and in the late morning everything was ok again without any interaction from our side. When the issue occurs we see a weird topology plan, so RSTP is calculating something multiple times. All switches are up to date and a case with meraki was opened every time it happen without any solution right now. Does someone know such a behavior? We did not make any change to the network when it happened and we cannot reproduce it. We assume it happens when Core1 takes master role of stack, but we cannot force that for a test. Cheers Dirk
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