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NE40E V800R010C10SPC500 Configuration Guide - User Access 01

This is NE40E V800R010C10SPC500 Configuration Guide - User Access
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Configuring a VT

Configuring a VT

Layer 2 protocols cannot directly carry each other. Before configuring PPPoE access, create a virtual template (VT).

Context

Layer 2 protocols, such as PPP can communicate only over a virtual access (VA) session. A VA session, however, cannot be manually created or configured. Instead, a VA session is automatically generated after PPPoE services are configured and PPPoE parameters are configured in a VT.

Based on interface parameters defined in a VT, a device can automatically create VA interfaces for Layer 2 communication.

  • PPP packets are encapsulated based on parameters configured in a VT. A VT defines NCP parameters, such as IP addresses and upper-layer application protocols.

  • A VA session transmits data between the local and remote ends based on parameters defined in a VT.

When a VT is used for PPPoE services, the link layer protocol can only be PPP, and the network layer protocol can only be IP.

Before deleting a VT, ensure that the VT is not in use and the VA session automatically generated upon VT creation has been deleted.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface virtual-template virtual-template-number

    A VT is created and its view is displayed, or the view of an existing VT is displayed.

  3. Run ppp authentication-mode { auto | { pap | chap | mschapv1 | mschapv2 } * }

    A PPP authentication mode is configured.

  4. (Optional) Perform the following steps to configure PPP negotiation parameters:

    • Run ppp timer { negotiate seconds | retransmit retry-times } *

      A PPP negotiation timeout period and the maximum number of retransmission times allowed are configured.

    • Run ppp delay-lcp-negotiation [ force ]

      Delayed LCP packet transmission is configured.

    • Run ppp keepalive { interval interval-time | retransmit times | response-timeout response-timeout-time } * [ datacheck | no-datacheck ]

      A PPP detection interval and the maximum number of retransmission times allowed are configured.

    • Run ppp keepalive adjustment { system-state | retransmit }

      Adjustment of the number of PPP detection times is enabled.

    • Run mtu mtu

      An MTU is configured in the VT.

    • Run ppp mru mru

      An MRU is configured for PPP negotiation.

    • Run pppoe-motm motm-value

      The device is configured to encapsulate clock synchronization information to the MOTM tag in a PPPoE active discovery message (PADM).

    • Run quit

      Return to the system view.

    • Run pppoe ppp-max-payload enable

      The device is enabled to negotiate the MRU in compliance with standard protocols.

  5. (Optional) Run ppp chap user user-name

    A user name is specified.

  6. Run commit

    The configuration is committed.

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Updated: 2019-01-03

Document ID: EDOC1100055031

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