ZyXEL GS1920 Series User Guide - Page 236
Table 110, Label, Description
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Chapter 28 PPPoE Figure 172 Advanced Application > PPPoE > Intermediate Agent > Port The following table describes the labels in this screen. Table 110 Advanced Application > PPPoE > Intermediate Agent > Port LABEL Port * DESCRIPTION This field displays the port number. Use this row to make the setting the same for all ports. Use this row first and then make adjustments on a port-by-port basis. Server Trusted State Changes in this row are copied to all the ports as soon as you make them. Select whether this port is a trusted port (Trusted) or an untrusted port (Untrusted). Trusted ports are uplink ports connected to PPPoE servers. If a PADO (PPPoE Active Discovery Offer), PADS (PPPoE Active Discovery Sessionconfirmation), 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). Untrusted ports are downlink ports 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). Circuit-id The Switch discards PADO and PADS packets which are sent from a PPPoE server but received on an untrusted port. Enter a string of up to 63 ASCII characters that the Switch adds into the Agent Circuit ID sub-option for PPPoE discovery packets received on this port. Spaces are allowed. Remote-id The Circuit ID you configure for a specific VLAN on a port (in the Advanced Application > PPPoE > Intermediate Agent > Port > VLAN screen) has the highest priority. Enter a string of up to 63 ASCII characters that the Switch adds into the Agent Remote ID sub-option for PPPoE discovery packets received on this port. Spaces are allowed. If you do not specify a string here or in the Remote-id field for a VLAN on a port, the Switch automatically uses the PPPoE client's MAC address. The Remote ID you configure for a specific VLAN on a port (in the Advanced Application > PPPoE > Intermediate Agent > Port > VLAN screen) has the highest priority. GS1920 Series User's Guide 236