Pppoe; Chapter 28 Pppoe; Pppoe Intermediate Agent Overview; What You Can Do - ZyXEL Communications XS1930-12HP User 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.

28.1.1 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.

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 102 PPPoE Intermediate Agent Vendor-specific Tag Format
Tag_Type
(0x0105)
(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
XS1930 Series User's Guide
C
H A P T E R
220) to display the main PPPoE screen.
221) to enable the PPPoE Intermediate
222) to set the port state and configure
(Section 28.3.2 on page
224) to enable the PPPoE Intermediate Agent on a
i1
218
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PPPoE

223) to configure PPPoE IA settings
i2