is there anyone encountered a layer 1 issue with c9300 and avaya phones?
I am deploying new c9300 switches in our office. Network connectivity looks good, we have tested thin client applications, site to site connectivity and dhcp services. However avaya phone is having a physical issue, when avaya phone is connected to c9300, power inline shows it is providing power to avaya phone and avaya phone will start loading up. But avaya phone will show an error "no Ethernet" and interface in switch level will show notconnect. I already changed cables, change avaya phones and move connection to another port.
Any idea if this is a compatibility issue?
c9300 current IOS version is 16.9.2.
