Allied Telesis AT-8700XL Series User Manuals

Table of Contents

• Introduction

  1
  • Which products and software version does this information apply to?

    2
  • Related How To Notes

    3
• DHCP snooping

  3
  • Minimum configuration

    3
  • The database

    4
  • Trusted and non-trusted ports

    6
  • Enabling DHCP snooping

    6
  • Static binding

    6
  • Completely removing the DHCP snooping database

    7
• DHCP Option 82

  8
  • Protocol details

    9
  • Configuring Option 82

    10
• DHCP filtering

  11
  • Configuring filtering

    11
  • ARP security

    12
  • Resource considerations

    12
• Configuration examples

  14
  • Configuring the switch for DHCP snooping, filtering and Option 82, when it is acting as a layer 2 switch

    14
  • Configuring the switch for DHCP snooping, filtering, and Option 82, when it is acting as a layer 3 BOOTP Relay Agent

    17
• Troubleshooting

  20
  • No trusted ports configured

    20
  • The DHCP client continually sends requests instead of a discover

    21
  • Switch is dropping ARPs

    22
  • Displaying log entries

    24
• Appendix 1: ISC DHCP server

  25