[c-nsp] MPLS Ethernet Frame - FCS

Saku Ytti saku at ytti.fi
Mon Jul 15 13:48:39 EDT 2013

On (2013-07-15 10:17 -0700), Dhamija Amit wrote:

> Does MPLS ethernet frame Ethertype - 0X88447 contains the FCS?? I mean is it 14 bytes or 18 bytes in size ??

EtherType does not affect frame format at all, it just tells what the
payload contains.
So it's 18 if you're counting DMAC, SMAC, EtherType, FCS.

Obviously there must be some payload, 46B of it, out of which at least 4B
at start is MPLS label.

Then in L1 you need preamble, SFD and IFG.


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