Field |
Description |
|---|---|
Destination_address |
Indicates either a unicast Ethernet destination address or the Ethernet broadcast address (0xffffffffffff). For Discovery packets, the value is either a unicast or broadcast address. A PPPoE client uses a broadcast address to search for a PPPoE server and uses a unicast address after choosing a PPPoE server. For PPP session traffic, this field must contain the peer's unicast address as determined from the Discovery stage. |
Source_address |
Indicates the Ethernet MAC address of a source device. |
Ether_type |
Set to either 0x8863 (Discovery stage) or 0x8864 (Session stage). |
Ver |
Indicates a PPPoE version number. The Ver field is four bits and must be set to 0x1. |
Type |
Indicates a PPPoE type. The Type field is four bits and must be set to 0x1. |
Code |
Indicates a PPPoE packet type. The Code field is eight bits and has different values:
|
Session_ID |
The SESSION_ID field is sixteen bits. The value is fixed for a given PPP session and defines a PPP session along with Ethernet source and destination addresses. A value of 0xffff is reserved for future use and must not be used. |
Length |
Indicates the length of the PPPoE payload. The Length field is 16 bits, excluding the length of the Ethernet or PPPoE header. |