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Ethertype
dschatzberg edited this page Mar 21, 2012
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According to http://linuxreviews.org/dictionary/Ethernet/ referring to the 2 byte field following the MAC addresses:
"values of that field between 64 and 1522 indicated the use of the new 802.3 Ethernet format with a length field, while values of 1536 decimal (0600 hexadecimal) and greater indicated the use of the original DIX or Ethernet II frame format with an EtherType sub-protocol identifier."
so I have to make sure my ethertype is >= 0x0600.
According to http://standards.ieee.org/regauth/ethertype/eth.txt use of 0x88b5 and 0x88b6 is "available for public use for prototype and vendor-specific protocol development." So this is what I am going to use as an ethertype.