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S12700 V200R011C10 Configuration Guide - User Access and Authentication

This document describes the working mechanisms, configuration procedures, and configuration examples of User Access and Authentication features, such as AAA, DAA, NAC, PPPoE, Policy Association, and IP session.
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(Optional) Configuring the S12700 to Process Option Fields

(Optional) Configuring the S12700 to Process Option Fields

Context

When DHCP snooping is configured on the device, the device can add the Option 82 field in DHCP Discover and DHCP Request messages sent from users. The Option 82 field records physical information about a user, such as the interface number and VLAN ID. The information is used by an upper-layer authentication server to authenticate the user. The device can select service policies based on Option 60 information. The user access IP address and information required for authentication and authorization are obtained from the Option 60 information.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number.subnumber

    The sub-interface view is displayed.

  3. Perform either of the following operations as required:

    • Run dhcp option82 insert enable

      The device is enabled to add the Option 82 field in DHCP messages.

    • Run dhcp option82 rebuild enable

      The function that forcibly adds the Option 82 field to DHCP messages is enabled.

    By default, the device does not process the Option 82 field of DHCP messages.

    NOTE:

    After the dhcp option82 rebuild enable command is used, the device replaces the Option 82 field of DHCP messages sent from online IP session users. The Option 82 field is generated according to the configuration and is used to send DHCP messages to the remote DHCP server.

  4. Run dhcp service-policy option60

    The service policy is configured.

    By default, users connected to a sub-interface go online through the service scheme in the domain bound to the sub-interface.

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Updated: 2019-10-21

Document ID: EDOC1000178117

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