Hello, we recently installed a new core switch (cisco C9407R) at one of our schools and I keep getting these MAC Flapping messages. *Jan 24 15:06:47.069: %SW_MATM-4-MACFLAP_NOTIF: Host 1a82.cee1.c718 in vlan 20 is flapping between port Te3/0/3 and po...

Hello, We are having an issue where PC's that are connected to IP phones are not able to get DHCP IP addresses. The phones are able to get IP addresses but they are not passing the VLAN through to the PC. This switch is replacing an Aruba switch that...