I have the similar issue as you that happen in my environment in this couple of week, my AP is C9162 and running on 2.5Gb link speed. My c9300 multigiga switch register to meraki portal for monitoring purpose and I receive alert from meraki the link speed changed to 1Gb. I have use the cable tester Fluke to inspect from source to end and the result was pass. Need to manually shut and no shut the interface to recover. I haven't try to fixed the speed negotiation in the switchport as to me this is not a practical solutions. I have open TAC case with meraki TAC and the first thing he get me to do try is take down the AP and connect with a new patch cable from the switch to the AP instead of through the copper panel and monitor. 😞
... View more
