Cisco Catalyst 9600 and fixed wire speeds

If you connect your Cisco Catalyst 9600 to equipment using fixed wire speeds, you may need to issue the speed nonegotiate command on affected switchports.

interface HundredGigE1/0/47
 switchport mode trunk
 switchport nonegotiate
 load-interval 30
 carrier-delay msec 0
 speed nonegotiate
 enable