ethertype

Unanswered Question
Apr 3rd, 2008

Hi all, can anyone tell me why the ethertype field is needed in ethernet? is it so the next layer above knows what do do with the frame ?

I have this problem too.
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Kevin Dorrell Thu, 04/03/2008 - 02:12

Exactly. Some values are:

0x0800 - IP

0x0806 - ARP

0x0bad - Banyan Vines

0x8035 - RARP

0x809b - AppleTalk

0x8100 - 802.1Q trunk

0x8137 - Novell IPX

0x86dd - IPv6

Kevin Dorrell

Luxembourg

carl_townshend Thu, 04/03/2008 - 03:23

Hi Kevin, thanks for that, however, I know what the values are, Im interested in why they are used in the layer 2 header , what are they used for ?

Kevin Dorrell Thu, 04/03/2008 - 03:39

To identify the protocol so that the layer-2 on the receiving end can pass the frame up to the right layer-3 process.

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