SNR S2989G-48TX-RPS — настройка функций безопасности в PPPoE: руководство по TLV кадрам [351/553]
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SNR S2989G-48TX-RPS — настройка функций безопасности в PPPoE: руководство по TLV кадрам [351/553]

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SNR S2989G-48TX-RPS Руководство по настройке онлайн [351/553] 747284
S2989G-24TX Operation Manual
Chapter 6 Security Function Configuration
6-78
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 follows.
TLV length field (2 bytes): Specify the length of TAG data field.
TLV data field (the length is not specified): Specify the transmitted data of TAG.
Tag Type
Tag Explanation
0x0000
The end of a series tag in PPPoE data field, it is saved for ensuring the
version compatibility and is applied by some packets.
0x0101
Service name. Indicate the supplied services by network.
0x0102
Server name. When user receives the PADO response packet of AC, it can
obtain the server name from the tag and select the corresponding server.
0x0103
Exclusive tag of the host. It is similar to tag field of PPPoE data packets and
is used to match the sending and reveiving end (Because broadcast network
may exist many PPPoE data packets synchronously).
0x0104
AC-Cookies. It is used to avoid the vicious DOS attack.
0x0105
The identifier of vendor.
0x0110
Relay session ID. PPPoE data packet can be interrupted to other AC, this
field is used to keep other connection.
0x0201
The error of service name. When the requested service name is not
accepted by other end, the response packet will take this tag.
0x0202
The error of server name.
0x0203
Common error.
Figure 6-27 TAG value type of PPPoE

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Изучите, как настраивать функции безопасности в PPPoE, включая TLV кадры и их поля. Понимание типов и значений поможет обеспечить совместимость и безопасность соединений.