Pppoe; Chapter 30 Pppoe; Pppoe Intermediate Agent Overview; What You Can Do - ZyXEL Communications XGS2210-28 User Manual

30.1 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.

30.1.1 What You Can Do

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

30.1.2 What You Need to Know

Read on for concepts on ARP that can help you configure the screen in this chapter.
30.1.2.1 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 132 PPPoE Intermediate Agent Vendor-specific Tag Format
Tag_Type
(0x0105)

Chapter 30 PPPoE

(Section 30.2 on page
(Section 30.3 on page
(Section 30.3.1 on page
(Section 30.3.3 on page
Tag_Len Value
XGS2210 Series User's Guide
312
C
H A P T E R
314) to display the main PPPoE screen.
315) to enable the PPPoE Intermediate
316) to set the port state and configure
(Section 30.3.2 on page 318) to configure PPPoE IA settings
320) to enable the PPPoE Intermediate Agent on a
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PPPoE

i2