ETH

IEEE 802.3 Ethernet magic constants. The frame sizes omit the preamble and FCS/CRC (frame check sequence).

These are the defined Ethernet Protocol ID's.

Types

P: These are the defined Ethernet Protocol ID's.

Octets in one ethernet addr

Values

ALEN: Octets in one ethernet addr
TLEN: Octets in ethernet type field
HLEN: Total octets in header
ZLEN: Min.
DATA_LEN: Max.
FRAME_LEN: Max.
FCS_LEN: Octets in the FCS
MIN_MTU: Min IPv4 MTU per RFC791
MAX_MTU: 65535, same as IP_MAX_MTU