Pppoe; Chapter 29 Pppoe; Pppoe Intermediate Agent Overview; What You Can Do - ZyXEL Communications GS2210 Series User Manual

29.1 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

29.1.1 What You Can Do

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

29.1.2 What You Need to Know

Read on for concepts on ARP that can help you configure the screen in this chapter.
29.1.2.1 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 120 PPPoE Intermediate Agent Vendor-specific Tag Format
Tag_Type
(0x0105)
C
PPPoE IA
(Section 29.2 on page
(Section 29.3 on page
(Section 29.3.1 on page
(Section 29.3.3 on page
Tag_Len Value
GS2210 Series User's Guide
265
HAPTER
PPPoE Server
267) to display the main PPPoE screen.
268) to enable the PPPoE
269) to set the port state and
(Section 29.3.2 on page
271) to enable the PPPoE Intermediate
i1 i2
2 9

PPPoE

270) to configure PPPoE