Supermicro SSE-G2252, Руководство пользователя

Страница: 616 / 1401

Chapter 17: IP Services
Configuring the PPPoE Intermediate Agent
– 623 –
•
Set any interfaces connecting the switch to a PPPoE Server as
trusted. Interfaces that connect the switch to users (PPPoE clients)
should be set as untrusted.
•
At least one trusted interface must be configured on the switch for
the PPPoE IA to function.
•
Vendor Tag Strip – Enables the stripping of vendor tags from PPPoE
Discovery packets sent from a PPPoE server. (Default: Disabled)
This parameter only applies to trusted interfaces. It is used to strip off
vendor-specific tags (which carry subscriber and line identification
information) in PPPoE Discovery packets received from an upstream
PPPoE server before forwarding them to a user.
•
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)
•
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.
•
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.
•
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.
W
EB
I
NTERFACE
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.