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Configuration Guide - Security

S1720, S2700, S5700, and S6720 V200R011C10

This document describes the configurations of Security, including ACL, local attack defense, MFF, attack defense, traffic suppression and storm control, ARP security, Port security, DHCP snooping, ND snooping, PPPoE+, IPSG, SAVI, URPF, keychain, MPAC, separating the management plane from the service plane, security risks, PKI.
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(Optional) Configuring a Policy for Processing PPPoE Packets Sent by the PPPoE Server

(Optional) Configuring a Policy for Processing PPPoE Packets Sent by the PPPoE Server

Context

Generally, the Switch does not process PPPoE reply packets and directly forwards them to the PPPoE client. Only when the PPPoE client cannot identify PPPoE packets that the Switch directly forwards, the Switch needs to process the PPPoE reply packets sent by the PPPoE server to ensure communication between the PPPoE server and PPPoE client. The PPPoE reply packets are processed as follows:
  • When the policy for processing original fields in PPPoE packets is replace or keep:
    • If fields are not contained in PPPoE reply packets sent by the PPPoE server, the Switch directly forwards PPPoE reply packets.
    • If fields are contained in PPPoE reply packets sent by the PPPoE server and the format and content are consistent with those of the fields added to the user-side PPPoE packets, the Switch removes the original fields from PPPoE packets and forwards the packets. If the format and content are different from those of the fields added to the user-side PPPoE packets, the Switch directly forwards PPPoE reply packets.
  • When the policy for processing original fields in PPPoE packets is drop, the Switch directly forwards the PPPoE packets.
NOTE:

If the Switch is configured to process the PPPoE reply packets sent by the PPPoE server, the user access rate is reduced when the PPPoE server sends a large number of PPPoE+ packets.

The policy for processing packets takes effect only after PPPoE+ is enabled globally. To modify the configuration, disable PPPoE+ globally first.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run pppoe intermediate-agent information ignore-reply { disable | enable }

    The Switch is configured to directly forward or not to process PPPoE reply packets sent by the PPPoE server.

    By default, the Switch does not process PPPoE reply packets sent by the PPPoE server.

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Updated: 2019-03-28

Document ID: EDOC1000178177

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