ECS4660-28F_Management Guide-R03

C HAPTER 17 | 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.
CLI REFERENCES
◆ "pppoe intermediate-agent" on page 1081
◆ "pppoe intermediate-agent port-format-type" on page 1083
◆ "show pppoe intermediate-agent info" on page 1086
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 Status – Enables 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.)