A VLAN is configured to allow jumbo frames, but one or more ports drops all inbound jumbo frames

The port may not be operating at a minimum of 1 Gbps on the other switches covered in this guide. Regardless of a port's configuration, if it is actually operating at a speed lower than 1 Gbps for the other switches, it drops inbound jumbo frames. For example, if a port is configured for Auto mode (speed-duplex auto), but has negotiated a 7 Mbps speed with the device at the other end of the link, the port cannot receive inbound jumbo frames. To determine the actual operating speed of one or more ports, view the Mode field in the output for the following command:

show interfaces brief <port-list>