User's Manual

Configuration Guide of XGS-5240-Series
57-3
Fig 13-1 PPPoE IA protocol exchange process
1.1.1.26 PPPoE Packet Format
PPPoE packet format is as follows:
Ethernet II frame
Destination MAC
Source MAC
Type Field
PPPoE Data
CRC Check Sum
PPPoE data
Version
Type
Code
Session ID
Length Field
TLV1
……
TLV N
TLV frame
Type
Length
Data
Each field meanings in the following:
Type field (2 bytes) of Ethernet II frame: The protocol sets type field value of PPP
oE protocol packet as 0x8863 (include 5 kinds of packets in PPPoE discovery stage on
ly), type field value of session stage as 0x8864.
PPPoE version field (4 bits): Specify the current PPPoE protocol version, the curre
nt version must be set as 0x1.
PPPoE type field (4 bits): Specify the protocol type, the current version must be se
t as 0x1.
PPPoE code field (1 byte): Specify the packet type. 0x09 means PADI packet, 0x0
7 means PADO packet, 0x19 means PADR packet, 0x65 means PADS packet, 0xa7 m
eans PADT packet.
PPPoE session ID field (2 bytes): Specify the session ID.