QTECH QSW-2800 Инструкция по настройке - Manual (Page 349)

+7(495) 797-3311 www.qtech.ru
Москва, Новозаводская ул., 18, стр. 1
335
PPPoE IA protocol exchange process
47.1.2.2 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 PPPoE protocol
packet as 0x8863 (include 5 kinds of packets in PPPoE discovery stage only), type field value
of session stage as 0x8864.
PPPoE version field (4 bits): Specify the current PPPoE protocol version, the current version
must be set as 0x1.
PPPoE type field (4 bits): Specify the protocol type, the current version must be set as 0x1.
PPPoE code field (1 byte): Specify the packet type. 0x09 means PADI packet, 0x07 means
PADO packet, 0x19 means PADR packet, 0x65 means PADS packet, 0xa7 means PADT
packet.
PPPoE session ID field (2 bytes): Specify the session ID.
PPPoE length field (2 bytes): Specify the sum of all TLV length.
TLV type field (2 bytes): A TLV frame means a TAG, type field means TAG type, the table is as