Symptom
The AP is connected to a 9300/9400 switchport which logs the error message:
Sep 22 08:18:54 PDT: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on(not half duplex), with MPK> GigabitEthernet0 (half duplex).
Indicating that the port in which the AP is connected is having a duplex mismatch
Conditions
Have a 9300/9400 switch with mGig ports - access points that support mGig (11ac Wave 2, 11ax - any model) are connected to the ports.
Workaround
There is no known workaround on this issue
Further Problem Description
It can validated by entering to the AP and apllying the following command:
#show ip int br
Interface IP-Address Method Status Protocol Speed Duplex
wired0 DHCP up up 2500 full
apphostintf1 unassigned unset up up n/a n/a
apr0v0 n/a n/a up up n/a n/a
apr1v0 n/a n/a up up n/a n/a
And on the switch :
#show interfaces tenGigabitEthernet 10/0/45 status
Port Name Status Vlan Duplex Speed Type
Te10/0/45 connected trunk a-full a-2500 100/1000/2.5G/5G/10GBaseTX
