First one is normal ping with 64 bytes .
Second it is able to send 1500 with size 1500
Third one you are using switch -d called as df switch in ipv4 packet, i am not sure about DF but from the output we could see that the packet size is becoming larger which cannot be sent using normal MTU size 1500. Coming back to the original question, above test concludes we are able to send packet with MTU 1500 not beyond that so jumbo frames is not properly configured.
Provide me full set up details from source to destination nodes .we can keep scp part aside first we should be able to communicate using vmkping.
Regards,
Suresh
