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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) Enabling Keepalive Detection

(Optional) Enabling Keepalive Detection


After the Keepalive detection function is enabled, the local device periodically sends Keepalive probes to the peer to check tunnel connectivity. If the peer is reachable, the local device receives a reply packet from the peer. If a reply packet is not received, the local device disconnects the tunnel connection.

Keepalive detection takes effect on one end of the tunnel as long as it is configured with the Keepalive detection function. The other end of the tunnel is not required to configure Keepalive detection. To ensure that both ends of the tunnel can detect whether the peer is reachable, you are advised to enable Keepalive detection on both ends.


If the VPN instance bound to the tunnel interface is different from the VPN instance to which the destination IP address of the tunnel interface belongs, the Keepalive detection function cannot be enabled on the peer tunnel interface.


  1. Run system-view

    The system view is displayed.

  2. Run interface tunnel interface-number

    The tunnel interface view is displayed.

  3. Run keepalive [ period period [ retry-times retry-times ] ]

    Keepalive detection is enabled.

    By default, Keepalive detection is disabled.

Updated: 2019-04-08

Document ID: EDOC1100065751

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