Zyxel IES-1248 EE — pPPoE Intermediate Agent Configuration Guide and Format Overview [278/544]

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Chapter 40 PPPoE Intermediate Agent

IES-1248-51/51A/53 User’s Guide

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40.1.2 TR-101 Format

The PPPoE Intermediate Agent sub-option includes the system name or IP address, slot ID,

port number, VPI, and VCI on which the TCP/IP configuration request was received.

The following figure shows the format of the TR-101 PPPoE Intermediate Agent sub-option.

The 1 in the first field identifies this as an Agent Circuit ID sub-option. The next field specifies

the length of the field. The hostname field displays the system name, if it has been configured,

the extra information field (A) if the hostname was not configured, or the IP address in dotted

decimal notation (w.x.y.z), if neither the system name nor the extra information field was been

configured. In either case, the hostname is truncated to 23 characters, and trailing spaces are

discarded. The hostname field is followed by a space, the string “atm”, and another space.

Then, a 1-byte Slot ID field specifies the ingress slot number, and a 1-byte Port No field

specifies the ingress port number. Next, the VPI and VCI denote the virtual circuit that

received the DHCP request message from the subscriber. If the VID is turned on, there is a

colon and then the VLAN ID (1 ~ 4094). If the VID is turned off, there is neither colon nor

VID.

The slot ID, port number, VPI, VCI and MAC are separated from each other by a forward

slash (/) colon (:) or period (.). An example is “SYSNAME atm 3/10:0.33:12”.

Unlike the private format for PPPoE intermediate agent, the TR-101 format for PPPoE

intermediate agent does not include the Remote ID sub-option.

40.2 PPPoE Intermediate Agent Screen

Use this screen to configure the IES-1248 to give a PPPoE termination server additional

information that the server can use to identify and authenticate a PPPoE client.

To open this screen, click Advanced Application > PPPoE Intermediate Agent.

Table 93 PPPoE Intermediate Agent Sub-option Format: TR-101 (VID on)

1Nhostname / A / IP “ atm “ Slot ID / Port No. : VPI . VCI : VLAN ID

Table 94 PPPoE Intermediate Agent Sub-option Format: TR-101 (VID off)

1Nhostname / A / IP “ atm “ Slot ID / Port No. : VPI . VCI