C
HAPTER
16
| IP Services
Configuring the PPPoE Intermediate Agent
– 601 –
◆ Circuit ID – String identifying the circuit identifier (or interface) on this
switch to which the user is connected. (Range: 1-10 ASCII characters;
Default: Unit/Port:VLAN-ID, or 0/Trunk-ID:VLAN-ID)
â–
The PPPoE server extracts the Line-ID tag from PPPoE discovery
stage messages, and uses the Circuit-ID field of that tag as a NAS-
Port-ID attribute in AAA access and accounting requests.
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The switch intercepts PPPoE discovery frames from the client and
inserts a unique line identifier using the PPPoE Vendor-Specific tag
(0x0105) to PPPoE Active Discovery Initiation (PADI) and Request
(PADR) packets. The switch then forwards these packets to the
PPPoE server. The tag contains the Line-ID of the customer line over
which the discovery packet was received, entering the switch (or
access node) where the intermediate agent resides.
â–
Outgoing PAD Offer (PADO) and Session-confirmation (PADS)
packets sent from the PPPoE Server include the Circuit-ID tag
inserted by the switch, and should be stripped out of PADO and
PADS packets which are to be passed directly to end-node clients.
◆ Operational Circuit ID – The configured circuit identifier.
◆ Remote ID – String identifying the remote identifier (or interface) on
this switch to which the user is connected. (Range: 1-63 ASCII
characters; Default: Port MAC address)
◆ Operational Remote ID – The configured circuit identifier.
WEB INTERFACE
To configure interface settings for PPPoE IA:
1. Click IP Service, PPPoE Intermediate Agent.
2. Select Configure Interface from the Step list.
3. Select Port or Trunk interface type.
4. Enable PPPoE IA on an interface, set trust status, enable vendor tag
stripping if required, and set the circuit ID and remote ID.
5. Click Apply.
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