Do jumbo ethernet frames change the size of the ethernet header?

Question

I have a customer running jumbo ethernet frames (9600 mtu). Does this change the length of the header or is it still 18 bytes? Does the length/type field of the header change between standard and jumbo frames? Looking for a diagram of a jumbo ethernet frame but all I can find are standard diagrams so I am assuming the header size is the same. I did find that once you go past the size of a standard frame, the length field changes to protocol type. Any information would be greatly appreciated.

Answer 1

Hi Mark,
Still 18 bytes. Jumbo frames have an ethertype of 0x8870 and have a max size of 9018 bytes. That's 9000 plus 18 bytes of header/trailer, which is the same 6 bytes DA, 6 byte SA, 2 byte EtherType (0x8870) and at the end a 4-byte FCS. Below are some reference links.