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LTP-8X optical line terminal
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Chapter 18.
PPPoE Intermediate Agent Configuration
Introduction
This Chapter describes configuration of PPPoE Intermediate Agent of the terminal.
PPPoE Intermediate Agent is used to provide BRAS with additional information about a received PADI
request. This may include information about the terminal running PPPoE Intermediate Agent as well as
information about
THE
ONT which sent the PADI request. PADI packets are modified by interception and
further processing in terminal CPU.
BRAS analyses vendor specific tag and identifies the ONT. PPPoE Intermediate Agent forms or rewrites a
vendor specific tag using a specified format. Vendor specific tags are especially useful for a network
which has no private VLANs dedicated for each user.
PPPoE Intermediate Agent supports configurable formats for Circuit ID and Remote ID. The suboptions
format is configured with the help of the tokens listed in Table 18.1. The placeholders will be replaced
with corresponding values, while the rest of the words will be passed as is.
Table 18.1. Vendor Specific Tag Tokens
%HOSTNAME%
The terminal network name
%MNGIP%
The terminal IP address
%GPON-PORT%
ID of the OLT channel the PADI request arrived from
%ONTID%
ID of the ONT which sent the PADI request
%PONSERIAL%
Serial number of the ONT which sent the PADI request
%GEMID%
ID of the GEM port where the PADI request arrived
%VLAN0%
External VID
%VLAN1%
Internal VID
%MAC%
MAC address of the ONT which sent the request
In addition to vendor specific tag support, PPPoE Intermediate Agent has some more functions related
to network security. It provides protection from DoS attacks by setting a threshold for intensity of PADI
messages which are received from ONT. Exceeding the threshold blocks PADI requests. The blocking
time can be configured.
PPPoE Intermediate Agent also limits the number of simultaneous PPPoE sessions. The restriction can be
set for both the total number of terminal sessions and for every ONT separately.
