ZyXEL Communications GS2220 Series - Pppoe; C Ha Pte R 32 Pppo E; Pppoe Intermediate Agent Overview; What You Can Do

Chapter 32 PPPoE
GS2220 Series User’s Guide
300
C HAPTER 32
PPPo E
32.1 PPPoE Inte rm e dia te Ag e nt O ve rvie w
This chapter describes how the Switch gives a PPPoE termination server additional information that the
server can use to identify and authenticate a PPPoE client.
A PPPoE Intermediate Agent (PPPoE IA) is deployed between a PPPoE server and PPPoE clients. It helps
the PPPoE server identify and authenticate clients by adding subscriber line specific information to
PPPoE discovery packets from clients on a per-port or per-port-per-VLAN basis before forwarding them
to the PPPoE server.
32.1.1 Wha t You C a n Do
• Use the PPPo E screen (
Section 32.2 on page 302) to display the main PPPoE screen.
• Use the Inte rme dia te Ag e nt screen (
Section 32.3 on page 303) to enable the PPPoE Intermediate
Agent on the Switch.
• Use the PPPo E IA Pe r- Port screen (Section 32.3.1 on page 304) to set the port state and configure
PPPoE intermediate agent sub-options on a per-port basis.
• Use the PPPo E IA Pe r- Po rt Pe r- VLAN screen (Section 32.3.2 on page 305) to configure PPPoE IA settings
that apply to a specific VLAN on a port.
• Use the PPPo E IA fo r VLAN (Section 32.3.3 on page 306) to enable the PPPoE Intermediate Agent on a
VLAN.
32.1.2 Wha t You Ne e d to Kno w
Read on for concepts on ARP that can help you configure the screen in this chapter.
32.1.2.1 PPPo E Inte rme dia te Ag e nt Ta g Fo rm a t
If the PPPoE Intermediate Agent is enabled, the Switch adds a vendor-specific tag to PADI (PPPoE
Active Discovery Initialization) and PADR (PPPoE Active Discovery Request) packets from PPPoE clients.