Pppoe; Chapter 28 Pppoe; Pppoe Intermediate Agent Overview; What You Can Do - ZyXEL Communications GS 2200 Manual

28.1 PPPoE Intermediate Agent Overview

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.
PPPoE Client

28.1.1 What You Can Do

• Use the PPPoE screen
• Use the Intermediate Agent screen
Intermediate Agent on the Switch.
• Use the PPPoE Per-Port screen
PPPoE intermediate agent sub-options on a per-port basis.
• Use the PPPoE Per-Port Per-VLAN screen
settings that apply to a specific VLAN on a port.
• Use the PPPoE for VLAN screen
Agent on a VLAN.

28.1.2 What You Need to Know

Read on for concepts on ARP that can help you configure the screen in this chapter.
28.1.2.1 PPPoE Intermediate Agent Tag Format
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. This tag is defined in RFC 2516 and has the following format for this feature.
Table 81 PPPoE Intermediate Agent Vendor-specific Tag Format
Tag_Type
(0x0105)
GS2200-8/24 User's Guide
C
PPPoE IA
(Section 28.2 on page
(Section 28.3 on page
(Section 28.3.1 on page
(Section 28.3.3 on page
Tag_Len Value
HAPTER
225) to display the main PPPoE screen.
226) to enable the PPPoE
227) to set the port state and configure
(Section 28.3.2 on page 228) to configure PPPoE IA
230) to enable the PPPoE Intermediate
i1 i2
2 8

PPPoE

PPPoE Server
223