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CLI-based Configuration Guide - Reliability

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document provides guidance for configuring reliability services, including interface backup, BFD, VRRP, and EFM.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Example for Configuring a VRRP Group in Multi-gateway Load Balancing Mode

Example for Configuring a VRRP Group in Multi-gateway Load Balancing Mode

Networking Requirements

As shown in Figure 7-12, HostA and HostC are dual-homed to RouterA and RouterB through the switch. The requirements are as follows:
  • HostA uses RouterA as the default gateway to connect to the Internet, and RouterB functions as the backup gateway.
  • HostC uses RouterB as the default gateway to connect to the Internet, and RouterA functions as the backup gateway.
Therefore, load balancing can be implemented.
Figure 7-12  Networking diagram for configuring VRRP in multi-gateway load balancing mode

Configuration Roadmap

Multi-gateway load balancing is used to load balance traffic. The configuration roadmap is as follows:

  1. Assign an IP address to each interface and configure a routing protocol to ensure network connectivity.
  2. Create VRRP groups 1 and 2 on RouterA and RouterB. In VRRP group 1, configure RouterA as the master and RouterB as the backup. In VRRP group 2, configure RouterB as the master and RouterA as the backup.

Procedure

  1. Configure devices to ensure network connectivity.

    # Assign an IP address to each interface. RouterA is used as an example. The configurations of RouterB and RouterC are similar to the configuration of RouterA, and are not mentioned here.

    <Huawei> system-view
    [Huawei] sysname RouterA
    [RouterA] interface gigabitethernet 1/0/0
    [RouterA-GigabitEthernet1/0/0] ip address 192.168.1.1 24
    [RouterA-GigabitEthernet1/0/0] quit
    [RouterA] interface gigabitethernet 2/0/0
    [RouterA-GigabitEthernet2/0/0] ip address 10.1.1.1 24
    [RouterA-GigabitEthernet2/0/0] quit

    # Configure OSPF between RouterA, RouterB, and RouterC. RouterA is used as an example. The configurations of RouterB and RouterC are similar to the configuration of RouterA, and are not mentioned here.

    [RouterA] ospf 1
    [RouterA-ospf-1] area 0
    [RouterA-ospf-1-area-0.0.0.0] network 10.1.1.0 0.0.0.255
    [RouterA-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.0.255
    [RouterA-ospf-1-area-0.0.0.0] quit
    [RouterA-ospf-1] quit

  2. Configure VRRP groups.

    # Configure VRRP group 1 on RouterA and RouterB, set the priority of RouterA to 120 and the preemption delay to 20s, and set the default priority for RouterB.

    [RouterA] interface gigabitethernet 2/0/0
    [RouterA-GigabitEthernet2/0/0] vrrp vrid 1 virtual-ip 10.1.1.111
    [RouterA-GigabitEthernet2/0/0] vrrp vrid 1 priority 120
    [RouterA-GigabitEthernet2/0/0] vrrp vrid 1 preempt-mode timer delay 20
    [RouterA-GigabitEthernet2/0/0] quit
    [RouterB] interface gigabitethernet 2/0/0
    [RouterB-GigabitEthernet2/0/0] vrrp vrid 1 virtual-ip 10.1.1.111
    [RouterB-GigabitEthernet2/0/0] quit

    # Configure VRRP group 2 on RouterA and RouterB, set the priority of RouterB to 120 and the preemption delay to 20s, and set the default priority for RouterA.

    [RouterB] interface gigabitethernet 2/0/0
    [RouterB-GigabitEthernet2/0/0] vrrp vrid 2 virtual-ip 10.1.1.112
    [RouterB-GigabitEthernet2/0/0] vrrp vrid 2 priority 120
    [RouterB-GigabitEthernet2/0/0] vrrp vrid 2 preempt-mode timer delay 20
    [RouterB-GigabitEthernet2/0/0] quit
    
    [RouterA] interface gigabitethernet 2/0/0
    [RouterA-GigabitEthernet2/0/0] vrrp vrid 2 virtual-ip 10.1.1.112
    [RouterA-GigabitEthernet2/0/0] quit

  3. Verify the configuration.

    # After the configuration is complete, run the display vrrp command on RouterA. You can see that RouterA is the master in VRRP group 1 and the backup in VRRP group 2.

    [RouterA] display vrrp
      GigabitEthernet2/0/0 | Virtual Router 1
        State        : Master
        Virtual IP     : 10.1.1.111
        Master IP      : 10.1.1.1
        PriorityRun    : 120
        PriorityConfig : 120                                                        
        MasterPriority : 120                                                        
        Preempt : YES   Delay Time : 20 s       
        TimerRun : 1 s                                                              
        TimerConfig : 1 s                                                           
        Auth type : NONE                                                            
        Virtual MAC : 0000-5e00-0101                                                
        Check TTL : YES                                                             
        Config type : normal-vrrp                                                   
        Backup-forward : disabled
        Create time : 2012-05-11 11:39:18                                           
        Last change time : 2012-05-26 11:38:58 
      GigabitEthernet2/0/0 | Virtual Router 2
        State        : Backup
        Virtual IP     : 10.1.1.112
        Master IP      : 10.1.1.2
        PriorityRun    : 100
        PriorityConfig : 100                                                        
        MasterPriority : 120                                                        
        Preempt : YES   Delay Time : 0 s        
        TimerRun : 1 s                                                              
        TimerConfig : 1 s                                                           
        Auth type : NONE                                                            
        Virtual MAC : 0000-5e00-0102                                                
        Check TTL : YES                                                             
        Config type : normal-vrrp                                                   
        Backup-forward : disabled
        Create time : 2012-05-11 11:40:18                                           
        Last change time : 2012-05-26 11:48:58

    # After the configuration is complete, run the display vrrp command on RouterB. You can see that RouterB is the backup in VRRP group 1 and the master in VRRP group 2.

    [RouterB] display vrrp
      GigabitEthernet2/0/0 | Virtual Router 1
        State        : Backup
        Virtual IP     : 10.1.1.111
        Master IP      : 10.1.1.1
        PriorityRun    : 100
        PriorityConfig : 100                                                        
        MasterPriority : 120                                                        
        Preempt : YES   Delay Time : 0 s        
        TimerRun : 1 s                                                              
        TimerConfig : 1 s                                                           
        Auth type : NONE                                                            
        Virtual MAC : 0000-5e00-0101                                                
        Check TTL : YES                                                             
        Config type : normal-vrrp                                                   
        Backup-forward : disabled
        Create time : 2012-05-11 11:39:18                                           
        Last change time : 2012-05-26 11:38:58 
      GigabitEthernet2/0/0 | Virtual Router 2
        State        : Master
        Virtual IP     : 10.1.1.112
        Master IP      : 10.1.1.2
        PriorityRun    : 120
        PriorityConfig : 120                                                        
        MasterPriority : 120                                                        
        Preempt : YES   Delay Time : 20 s       
        TimerRun : 1 s                                                              
        TimerConfig : 1 s                                                           
        Auth type : NONE                                                            
        Virtual MAC : 0000-5e00-0102                                                
        Check TTL : YES                                                             
        Config type : normal-vrrp                                                   
        Backup-forward : disabled
        Create time : 2012-05-11 11:40:18                                           
        Last change time : 2012-05-26 11:48:58

Configuration Files

  • RouterA configuration file

    #
    sysname RouterA
    #
    interface GigabitEthernet1/0/0
     ip address 192.168.1.1 255.255.255.0
    #
    interface GigabitEthernet2/0/0
     ip address 10.1.1.1 255.255.255.0
     vrrp vrid 1 virtual-ip 10.1.1.111
     vrrp vrid 1 priority 120
     vrrp vrid 1 preempt-mode timer delay 20
     vrrp vrid 2 virtual-ip 10.1.1.112
    #
    ospf 1
     area 0.0.0.0
      network 192.168.1.0 0.0.0.255
      network 10.1.1.0 0.0.0.255
    #
    return
  • RouterB configuration file

    #
    sysname RouterB
    #
    interface GigabitEthernet1/0/0
     ip address 192.168.2.1 255.255.255.0
    #
    interface GigabitEthernet2/0/0
     ip address 10.1.1.2 255.255.255.0
     vrrp vrid 1 virtual-ip 10.1.1.111
     vrrp vrid 2 virtual-ip 10.1.1.112
     vrrp vrid 2 priority 120
     vrrp vrid 2 preempt-mode timer delay 20
    #
    ospf 1
     area 0.0.0.0
      network 192.168.2.0 0.0.0.255
      network 10.1.1.0 0.0.0.255
    #
    return
  • RouterC configuration file

    #
    sysname RouterC
    #
    interface GigabitEthernet1/0/0
     ip address 192.168.1.2 255.255.255.0
    #
    interface GigabitEthernet2/0/0
     ip address 192.168.2.2 255.255.255.0
    #
    interface GigabitEthernet3/0/0
     ip address 172.16.1.1 255.255.255.0
    #
    ospf 1
     area 0.0.0.0
      network 172.16.1.0 0.0.0.255
      network 192.168.1.0 0.0.0.255
      network 192.168.2.0 0.0.0.255
    #
    return
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Updated: 2019-08-12

Document ID: EDOC1100034076

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