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Configuration Guide - VPN

S7700 and S9700 V200R013C00

This document describes the configurations of VPN, including GRE, IPSec, BGP/MPLS IP VPN, BGP/MPLS IPv6 VPN, VLL, PWE3, VPLS, L2VPN Access to L3VPN.
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(Optional) Configuring a Security Mechanism for GRE

(Optional) Configuring a Security Mechanism for GRE

Context

You can configure key numbers for both ends of a GRE tunnel to improve GRE tunnel security. This security mechanism ensures that a device accepts only packets sent from the valid tunnel interface and discards invalid packets.

NOTE:

Only the X series cards support this function.

The XGE interface connected to ACU2 supports this function.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface tunnel interface-number

    The tunnel interface view is displayed.

  3. Run gre key { plain key-number | [ cipher ] plain-cipher-text }

    A key is configured for the GRE tunnel.

    Specify the same value for the key-number parameter on tunnel interfaces on both ends of the GRE tunnel, or configure no key for either end of the tunnel.

    By default, no key is configured for the GRE tunnel.

    If plain is selected, the key is saved in the configuration file in plain text. This brings security risks. It is recommended that you select cipher to save the key in cipher text.

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Updated: 2019-04-08

Document ID: EDOC1100065751

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