ZyXEL MES3500-24F User Guide - Page 251
The PPPoE Screen, PPPoE Intermediate Agent
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Chapter 31 PPPoE Trusted ports are connected to PPPoE servers. • If a PADO (PPPoE Active Discovery Offer), PADS (PPPoE Active Discovery Session-confirmation), or PADT (PPPoE Active Discovery Terminate) packet is sent from a PPPoE server and received on a trusted port, the Switch forwards it to all other ports. • If a PADI or PADR packet is sent from a PPPoE client but received on a trusted port, the Switch forwards it to other trusted port(s). Note: The Switch will drop all PPPoE discovery packets if you enable the PPPoE intermediate agent and there are no trusted ports. Untrusted ports are connected to subscribers. • If a PADI, PADR, or PADT packet is sent from a PPPoE client and received on an untrusted port, the Switch adds a vendor-specific tag to the packet and then forwards it to the trusted port(s). • The Switch discards PADO and PADS packets which are sent from a PPPoE server but received on an untrusted port. 31.2 The PPPoE Screen Use this screen to configure the PPPoE Intermediate Agent on the Switch. Click Advanced Application > PPPoE in the navigation panel to display the screen as shown. Click Click Here to go to the Intermediate Agent screen. Figure 138 Advanced Application > PPPoE Intermediate Agent 31.3 PPPoE Intermediate Agent Use this screen to configure the Switch to give a PPPoE termination server additional subscriber information that the server can use to identify and authenticate a PPPoE client. MES3500-24/24F User's Guide 251