Pre-configuration Tasks
Before configuring the Keepalive function, complete the following tasks:
l Configuring the link layer attributes of the interfaces
l Assigning IP addresses to the interfaces
l Establishing the GRE tunnel and keeping the tunnel Up
Data Preparation
To configure the Keepalive function, you need the following data.
No. Data
1 Interval for sending Keepalive messages
2 Retry times of the unreachable timer
2.5.2 Enabling the Keepalive Function
The Keepalive function of a GRE tunnel is unidirectional. To implement the Keepalive function
on both ends, you must enable the Keepalive function on both ends of a GRE tunnel.
Context
Do as follows on the switch that requires the Keepalive function.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface tunnel interface-number
The tunnel interface view is displayed.
Step 3 Run:
tunnel-protocol gre
The tunnel is encapsulated with GRE.
Step 4 Run:
keepalive [ period period [ retry-times retry-times ] ]
The Keepalive function is enabled.
The Keepalive function of a GRE tunnel is unidirectional. Therefore, to realize the Keepalive
function on both ends, you must enable the Keepalive function on both ends of a GRE tunnel.
One end can be configured with the Keepalive function regardless of whether the remote end is
enabled with the Keepalive function or not. But it is still recommended to enable the Keepalive
function on both ends of the GRE tunnel.
Quidway S7700 Smart Routing Switch
Configuration Guide - VPN 2 GRE Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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