ZyXEL Communications XS3800-28, User Manual, Page: 349 / 789

Chapter 47 PPPoE
XS3800-28 User’s Guide
349
Figure 259 SWITCHING > PPPoE Intermediate Agent > PPPoE IA Port (Stacking Mode)
The following table describes the labels in this screen.
Table 165 SWITCHING > PPPoE Intermediate Agent > PPPoE IA Port
LABEL DESCRIPTION
SLOT This field appears only in Stacking mode. Click the drop-down list to choose the slot number of
the Switch in a stack.
Port This field displays the port number. In Stacking mode, the first number represents the slot ID and
the second is the port number. Please note that the default stacking ports (the last four ports of
your Switch) cannot be configured. They are reserved for stacking only.
* 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.
Changes in this row are copied to all the ports as soon as you make them.
Server Trusted
State 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 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 ports.
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 ports.
The Switch discards PADO and PADS packets which are sent from a PPPoE server but received
on an untrusted port.