25.1 Overview .......................................................................................................................................189

25.1.1 What You Can Do ................................................................................................................189

25.1.2 What You Need to Know ......................................................................................................190

25.2 IP Source Guard ..........................................................................................................................190

25.3 IP Source Guard Static Binding ....................................................................................................191

25.4 DHCP Snooping ...........................................................................................................................192

25.5 DHCP Snooping Configure ..........................................................................................................195

25.5.1 DHCP Snooping Port Configure .........................................................................................197

25.5.2 DHCP Snooping VLAN Configure ......................................................................................199

25.5.3 DHCP Snooping VLAN Port Configure ................................................................................199

25.6 ARP Inspection Status .................................................................................................................201

25.7 ARP Inspection VLAN Status ........................................................................................................202

25.8 ARP Inspection Log Status ...........................................................................................................202

25.9 ARP Inspection Configure .............................................................................................................204

25.9.1 ARP Inspection Port Configure ............................................................................................205

25.9.2 ARP Inspection VLAN Configure .........................................................................................207

25.10 Technical Reference ....................................................................................................................208

25.10.1 DHCP Snooping Overview ................................................................................................208

25.10.2 ARP Inspection Overview ..................................................................................................210

Chapter 26

Loop Guard .......................................................................................................................................212

26.1 Loop Guard Overview ..................................................................................................................212

26.1.1 What You Can Do ................................................................................................................212

26.1.2 What You Need to Know ......................................................................................................212

26.2 Loop Guard Setup .........................................................................................................................214

Chapter 27

Layer 2 Protocol Tunneling..............................................................................................................216

27.1 Layer 2 Protocol Tunneling Overview ..........................................................................................216

27.1.1 What You Can Do ................................................................................................................216

27.1.2 What You Need to Know ......................................................................................................216

27.2 Configuring Layer 2 Protocol Tunneling ........................................................................................217

Chapter 28

PPPoE ................................................................................................................................................220

28.1 PPPoE Intermediate Agent Overview ...........................................................................................220

28.1.1 What You Can Do ................................................................................................................220

28.1.2 What You Need to Know ......................................................................................................220

28.2 The PPPoE Screen .......................................................................................................................222

28.3 PPPoE Intermediate Agent ..........................................................................................................223

GS2210 Series User's Guide

Table of Contents