When a client tries to send packets too big for the network (as when the client is configured with jumbo frames but the network isn't), this can be really painf

When a client tries to send packets too big for the network (as when the client is configured with jumbo frames but the network isn't), this can be really painful to debug. The worst is that many things will work because small packets get through. For example, an "scp" connection may successfully connect, and then just hang when it starts transferring real data.