Web Management Guide-R04

Table Of Contents
Chapter 18
| IP Services
Configuring the PPPoE Intermediate Agent
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Configuring the PPPoE Intermediate Agent
This section describes how to configure the PPPoE Intermediate Agent (PPPoE IA)
relay parameters required for passing authentication messages between a client
and broadband remote access servers.
Configuring PPPoE IA
Global Settings
Use the IP Service > PPPoE Intermediate Agent (Configure Global) page to enable
the PPPoE IA on the switch, set the access node identifier, and set the generic error
message.
Command Usage
When PPPoE IA is enabled, the switch inserts a tag identifying itself as a PPPoE IA
residing between the attached client requesting network access and the ports
connected to broadband remote access servers (BRAS). The switch extracts access-
loop information from the client’s PPPoE Active Discovery Request, and forwards
this information to all trusted ports (designated on the Configure Interface page).
The BRAS detects the presence of the subscriber’s circuit-ID tag inserted by the
switch during the PPPoE discovery phase, and sends this tag as a NAS-port-ID
attribute in PPP authentication and AAA accounting requests to a RADIUS server.
Parameters
These parameters are displayed:
PPPoE IA Global StatusEnables the PPPoE Intermediate Agent globally on
the switch. (Default: Disabled)
Note that PPPoE IA must be enabled globally before it can be enabled on an
interface.
Access Node Identifier – String identifying this switch as an PPPoE IA to the
PPPoE server. (Range: 1-48 ASCII characters: Default: IP address of first IPv4
interface on the switch.)
The switch uses the access-node-identifier to generate the circuit-id for PPPoE
discovery stage packets sent to the BRAS, but does not modify the source or
destination MAC address of these PPPoE discovery packets. These messages are
forwarded to all trusted ports designated on the Configure Interface page.
Operational Access Node Identifier – The configured access node identifier.
Generic Error Message – An error message notifying the sender that the
PPPoE Discovery packet was too large. (Range: 0-127; Default: PPPoE Discover
packet too large to process. Try reducing the number of tags added.)
Operational Generic Error Message – The configured generic error message.