Ethernet frames
Outer Ethernet frames (layer 2 frames) are classified in the basic classes shown in this table.
Class | Classification Conditions | Length of L2 Classification Data (in bytes) |
---|---|---|
EtherII | The frame decoder recognizes an EtherII frame
if both of these conditions are met:
|
2 |
Novell_RAW | The frame decoder recognizes a Novell_RAW
frame if both of these conditions are met:
|
4 |
SNAP | The frame decoder recognizes a SNAP frame if
both of these conditions are met:
|
10 |
LLC | The frame decoder assumes an LLC frame (the MAC header is assumed to be followed by a 3-byte LLC header) if the value of the MAC Length/Type field is smaller than or equal to 1500 (0x05DC), and none of the above applies. | 5 |
PPPoE Discovery | The frame decoder recognizes a PPPoE Discovery frame if both of these
conditions are met:
|
|
PPPoE Session | The frame decoder recognizes a PPPoE Session frame if both of these
conditions are met:
|
|
Other | The frame decoder recognizes an Other packet if none of the above applies. |