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ip address 8.8.8.8 255.255.255.255
#
interface LoopBack3
ip address 10.0.0.2 255.255.255.255
#
l2tp enable
l2tp-group lac1
tunnel name lac1
start l2tp ip 3.3.3.3
tunnel authentication
tunnel password simple Huawei-123
tunnel source loopback2 rui
tunnel timer hello 200
#
bfd bfd-net bind peer-ip 10.0.0.1
discriminator local 3
discriminator remote 3
commit
#
ospf 1
default cost inherit-metric
import-route direct
preference 100
area 0.0.0.0
network 10.0.0.0 0.0.0.255
network 10.0.2.0 0.0.0.255
network 10.0.3.0 0.0.0.255
#
11.10.13 Example for Configuring Dual-System Backup for
Distributed NAT Services
This section provides an example showing how to configure dual-system backup for distributed
NAT services using a configuration flowchart. The example explains networking requirements,
configuration notes, and configuration roadmap.This configuration example only applies to the
VSUI-20-A board.
Networking Requirements
On the network shown in
, users access Routers A and B through a LAN Switch
(LSW). VRRP is used between Routers A and B to back up information about NAT and non-
NAT users, and distributed NAT is configured on Routers A and B for NAT users. If Router A,
Router B, or its network-side link fails, a master/slave device switchover can be implemented
without interrupting services. If an access-side link fails, a VRRP switchover is triggered.
Router C continues to forward public network traffic to the master device in the VRRP backup
group. The master device then forwards the public network traffic to the slave device using a
tunnel. The slave device performs a NAT operation before forwarding the traffic to users.
HUAWEI NetEngine80E/40E Router
Configuration Guide - Reliability
11 Multi-node Backup Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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