Symptom
C9300-24UX intermittently fails to pass traffic to VG224 voice gateway upon a reload. If there are multiple gateways connected, the switch may fail to send traffic on few ports connected to the voice gateways and the issue may be seen on different ports upon reloads.
The issue is seen specifically when both the switch port and the end client are hard coded with speed 100 full duplex.
Conditions
C9300-24UX connected to Voice Gateway VG224
Workaround
Bouncing the affected port resolves the issue and the remains stable until the next reload/power down event
Further Problem Description
Issue is specific to C9300 mGig switches when interfaces are hardcoded to link up at 100M full duplex