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5. Upon receiving the PADO packets with the Circuit-ID tag, the switch will remove the tag

and send the packets to the client. The switch will forward the PADO packets without the

Circuit-ID tag directly.

6. The client sends PADR (PPPoE Active Discovery Request) packets according to the

process.

7. The switch intercepts PADR packets and inserts a unique Circuit-ID tag to them.

8. The switch forwards the PADR packets with Circuit-ID tag to the BRAS.

9. The BRAS processes the received Circuit-ID tag in the PADR packets and extracts the

Circuit-ID field to the RADIUS for accounting. And the BRAS allocates a PPP process

session ID for this PPP session.

10. The BRAS responses with the PADS (PPPoE Active Discovery Session-confirmation)

packets after receiving the PADR packets.

11. Upon receiving the PADS packets with the Circuit-ID tag, the switch will remove the tag

and send the packets to the client. The switch will forward the PADS packets without the

Circuit-ID tag directly.

On the PPPoE ID Insertion page, you can enable the PPPoE ID insertion function globally. Each

port’s PPPoE ID Insertion feature and type can be configured separately.

Choose the menu Network Security→PPPoE→PPPoE ID Insertion to load the following page.

Figure 14-30 PPPoE Circuit-ID Config

The following entries are displayed on this screen:



Global Config

PPPoE ID Insertion:

Enable/Disable the PPPoE Circuit-ID Insertion function globally.

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