Re: Length of Ethernet frame

Mon, 02 Oct 2000 00:05:29 -0700

You left out the type/length field: 2
 
You don't count the preamble (it is used to sync the frame). Thus,
 
DA: 6
SA: 6
Length/Type: 2
Data: 1500
FCS: 4
 
= 1518.
 
Regards,
MLC
Dear group,
 
I have one question which has bugged me for ages, that is, what exactly is the maximum length for an Ethernet frame (assuming no other encapsulation like ISL)?  The number 1518 keeps on getting mentioned, but I just can't seem to work that number out:
 
The way I see is:
 
Preamble:    8
DA: 6
SA: 6
Data: 1500
FCS: 4
 
All those add up to 1524!!!!  How do people get the number of 1518???
 
Much appreciate any help!
 
Martin
 

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