SNR S2989G-48TX-DC [352/553] Trust port of pppoe intermediate agent

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S2989G-24TX Operation Manual

Chapter 6 Security Function Configuration

6-79

6.10.1.2.3 PPPoE Intermediate Agent vendor tag Frame

The following is the format of tag added by PPPoE IA, adding tag is the Uppermost

function of PPPoE IA.

Figure 6-28 PPPoE IA - vendor tag (4 bytes in each row)

Add TLV tag as 0x0105 for PPPoE IA, TAG_LENGTH is length field of vendor tag;

0x00000DE9 is “ADSL Forum” IANA entry of the fixed 4 bytes; 0x01 is type field of Agent

Circuit ID, length is length field and Agent Circuit ID value field; 0x02 is type field of Agent

Remot ID, length is length field and Agent Remote ID value field.

PPPoE IA supplies a default circuit ID value, the default circuit ID (The figure in the

following) includes 5 fields, ANI (Access Node Identifier) can be configured by user, its

length is less than 47 bytes. If there is no ANI configured, MAC is accessed by default,

occupy 6 bytes and use space symbol to compart, “eth” occupies 3 bytes and uses space

symbol to compart, “Slot ID” occupies 2 bytes, use “/” to compart and occupy 1 byte, “Port

Index” occupies 3 bytes, use “:” to compart and occupy 1 byte, “Vlan ID” occupies 4 bytes,

all fields use ASCII, user can configure ciucuit ID for each port according to requirement.

Figure 6-29 Agent Circuit ID value

MAC of the access switch is the default remote ID value of PPPoE IA. remote ID

value can be configured by user flexibly, the length is less than 63 bytes.

6.10.1.2.4 Trust Port of PPPoE Intermediate Agent

Discovery stage sends five kinds of packets, PADI and PADR packets sent by client

ANI

(n byte)

Space

( 1byte)

eth

(3 byte)

Space

(1 byte)

Slot ID

(2 byte)

(1byte)

Port Index

(3 byte)

(1 byte)

Vlan ID

(4 byte)