Ethernet
Click on the red underlined text to get to the source
... hosts to the customer
premise access device, is via Ethernet. In addition, it is desirable
to keep the cost of this device as low as possible while requiring
little or no configuration.
...
... little or no configuration.
PPP over Ethernet (PPPoE) provides the ability to connect a network
...
... PPP
session must learn the Ethernet address of the remote peer, as well
as establish a unique session identifier ...
... Host wishes to initiate a PPPoE session, it
must first perform Discovery to identify the Ethernet MAC address of
the peer and establish a PPPoE SESSION ...
... Access Concentrator have the information they will use to build their
point-to-point connection over Ethernet.
The Discovery stage remains stateless ...
... PPP sections.
An Ethernet frame is as follows:
1
...
... The DESTINATION_ADDR field contains either a unicast Ethernet
destination address, or the Ethernet ...
... determined from the Discovery stage.
The SOURCE_ADDR field MUST contains the Ethernet MAC address of the
source device.
...
... defines a PPP session along with the Ethernet SOURCE_ADDR and
DESTINATION_ADDR. A value of 0xffff is reserved for future use and
...
... There are four steps to the Discovery stage. When it completes, both
peers know the PPPoE SESSION_ID and the peer's Ethernet address,
which together define the PPPoE session ...
... Session Stage.
All Discovery Ethernet frames have the ETHER_TYPE field set to the
value 0x8863.
...
... DESTINATION_ADDR field is set
to the unicast Ethernet address of the Access Concentrator that sent
the PADO ...
... DESTINATION_ADDR
field is a unicast Ethernet address, the CODE field is set to 0xa7
and the SESSION ...
... PPP
encapsulation. All Ethernet packets are unicast. The ETHER_TYPE
field is set to 0x8864. The PPPoE ...
... The Maximum-Receive-Unit (MRU) option MUST NOT be negotiated to a
larger size than 1492. Since Ethernet has a maximum payload size of
1500 octets, the PPPoE ...
... The ETHER_TYPEs used in this document (0x8863 and 0x8864) have been
assigned by the IEEE for use by PPP Over Ethernet (PPPoE). Use of
these values and the PPPoE ...