Hi maheshwar reddy,
Thanks for your reply.
I'd like to know whether you had already used the Wireshark to capture the packet or not.
After compare the captured the packet, we can figure out the difference of ethernet application between the K60 and the K60.
And I think I miss one thing, the ethernet related interrupt vectors are different between the K60 and K66.

Fig K60

Fig K66
Hope it helps.
Have a great day,
Ping
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