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CLI-based Configuration Guide - Reliability

AR100-S, AR110-S, AR120-S, AR150-S, AR160-S, AR200-S, AR1200-S, AR2200-S, and AR3200-S V200R009

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Example for Configuring Association Between VRRP and NQA to Monitor the Uplink Status

Example for Configuring Association Between VRRP and NQA to Monitor the Uplink Status

Networking Requirements

As shown in Figure 7-16, hosts on a LAN are dual-homed to RouterA and RouterB through the switch. A VRRP group is established on RouterA and RouterB, and RouterA is the master. Generally, RouterA functions as the gateway and user traffic is transmitted along the path Switch -> RouterA -> RouterC -> RouterE.

When the link between RouterC and RouterE is faulty or unstable, the VRRP group can detect the fault and an active/standby switchover is performed rapidly. Then RouterB forwards services, so the impact of the link fault on service transmission is reduced.

Figure 7-16  Association between VRRP and NQA to monitor the uplink status

Configuration Roadmap

The configuration roadmap is as follows:

  1. Assign an IP address to each interface and configure a routing protocol to ensure network connectivity.
  2. Configure a VRRP group on RouterA and RouterB, set the priority of RouterA to 120 and the preemption delay to 20s so that RouterA functions as the master, and configure RouterB to use the default priority so that RouterB functions as the backup.
  3. Configure an NQA test instance of ICMP on RouterA, specify the IP address of GE1/0/0 on RouterE as the destination address, and configure the NQA test instance to detect connectivity of the link between RouterA and RouterE.
  4. Configure association between VRRP and NQA on RouterA. When the NQA test instance detects the link fault, an active/standby switchover is triggered.

Procedure

  1. Configure devices to ensure network connectivity.

    # Assign an IP address to each interface. RouterA is used as an example. The configurations of other routers 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 10.1.1.1 24
[RouterA-GigabitEthernet1/0/0] quit
[RouterA] interface gigabitethernet 2/0/0
[RouterA-GigabitEthernet2/0/0] ip address 192.168.1.1 24
[RouterA-GigabitEthernet2/0/0] quit

    # Configure Layer 2 transparent transmission on the switch.

    <Huawei> system-view
[Huawei] sysname Switch
[Switch] vlan 10
[Switch-vlan10] quit
[Switch] interface gigabitethernet 1/0/0
[Switch-GigabitEthernet1/0/0] port hybrid pvid vlan 10
[Switch-GigabitEthernet1/0/0] port hybrid untagged vlan 10
[Switch-GigabitEthernet1/0/0] quit
[Switch] interface gigabitethernet 2/0/0
[Switch-GigabitEthernet2/0/0] port hybrid pvid vlan 10
[Switch-GigabitEthernet2/0/0] port hybrid untagged vlan 10
[Switch-GigabitEthernet2/0/0] quit

    # Configure OSPF between devices. RouterA is used as an example. The configurations of other Routers 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 set the priority of RouterA to 120 and the preemption delay to 20s.

    [RouterA] interface gigabitethernet 1/0/0
[RouterA-GigabitEthernet1/0/0] vrrp vrid 1 virtual-ip 10.1.1.10
[RouterA-GigabitEthernet1/0/0] vrrp vrid 1 priority 120
[RouterA-GigabitEthernet1/0/0] vrrp vrid 1 preempt-mode timer delay 20
[RouterA-GigabitEthernet1/0/0] quit

    # Configure VRRP group 1 on RouterB. RouterB uses default priority 100.

    [RouterB] interface gigabitethernet 1/0/0
[RouterB-GigabitEthernet1/0/0] vrrp vrid 1 virtual-ip 10.1.1.10
[RouterB-GigabitEthernet1/0/0] quit

  3. # Configure an NQA test instance of ICMP with destination IP address 20.1.1.2/24 on RouterA. When the packet loss ratio reaches 80%, the NQA test instance is considered failed. 

    [RouterA] nqa test-instance user test
[RouterA-user-test] test-type icmp
[RouterA-user-test] destination-address ipv4 20.1.1.2
[RouterA-user-test] frequency 20
[RouterA-user-test] probe-count 5
[RouterA-user-test] fail-percent 80
[RouterA-user-test] start now
[RouterA-user-test] quit

  4. Configure association between VRRP and NQA on RouterA. When the NQA test instance is failed, the priority of RouterA decreases by 40. 

    [RouterA] interface gigabitethernet 1/0/0
[RouterA-GigabitEthernet1/0/0] vrrp vrid 1 track nqa user test reduced 40
[RouterA-GigabitEthernet1/0/0] quit

  5. Verify the configuration.

    # After the configuration is complete, run the display vrrp command on RouterA and RouterB. You can see that RouterA is the master, RouterB is the backup, and the associated NQA test instance is success.

    <RouterA> display vrrp
  GigabitEthernet1/0/0 | Virtual Router 1
    State           : Master
    Virtual IP       : 10.1.1.10
    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
    Track NQA : user  test   Priority reduced : 40
    NQA state : success
    Create time      : 2012-05-22 17:32:56
    Last change time : 2012-05-22 17:33:00

    <RouterB> display vrrp
  GigabitEthernet1/0/0 | Virtual Router 1
    State            : Backup
    Virtual IP       : 10.1.1.10
    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      : 2012-05-22 17:33:00
    Last change time : 2012-05-22 17:33:04

    # Run the shutdown command on GE1/0/0 of RouterE to simulate a link fault.

    [RouterE] interface gigabitethernet 1/0/0
[RouterE-GigabitEthernet1/0/0] shutdown
[RouterE-GigabitEthernet1/0/0] quit

    # Run the display nqa results test-instance user test command on RouterA. The command output shows that the NQA test instance status is failed.

    <RouterA> display nqa results test-instance user test
NQA entry(user, test) :testflag is active ,testtype is icmp
  1 .Test 1 result   The test is finished
   Send operation times: 5              Receive response times: 0
   Completion:failed                   RTD OverThresholds number: 0
   Attempts number:1                    Drop operation number:0
   Disconnect operation number:0        Operation timeout number:5
   System busy operation number:0       Connection fail number:0
   Operation sequence errors number:0   RTT Stats errors number:0
   Destination ip address:20.1.1.2
   Min/Max/Average Completion Time: 0/0/0                                       
   Sum/Square-Sum  Completion Time: 0/0                                         
   Last Good Probe Time: 0000-00-00 00:00:00.0                                  
   Lost packet ratio: 100 %

    # Run the display vrrp command on RouterA and RouterB. You can see that RouterA is in Backup state, RouterB becomes the master, and the NQA test instance is failed.

    <RouterA> display vrrp
  GigabitEthernet1/0/0 | Virtual Router 1
    State           : Backup
    Virtual IP       : 10.1.1.10
    Master IP        : 10.1.1.1
    PriorityRun      : 80
    PriorityConfig   : 120
    MasterPriority   : 100
    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
    Track NQA : user  test   Priority reduced : 40
    NQA state : failed
    Create time      : 2012-05-22 17:34:56
    Last change time : 2012-05-22 17:35:00

    <RouterB> display vrrp
  GigabitEthernet1/0/0 | Virtual Router 1
    State            : Master
    Virtual IP       : 10.1.1.10
    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      : 2012-05-22 17:35:00
    Last change time : 2012-05-22 17:35:04

    # Run the undo shutdown command on GE1/0/0 of RouterE.

    [RouterE] interface gigabitethernet 1/0/0
[RouterE-GigabitEthernet1/0/0] undo shutdown
[RouterE-GigabitEthernet1/0/0] quit

    # After 20s, run the display vrrp command on RouterA and RouterB. You can see that RouterA restores to be the master and RouterB the backup, and the associated NQA test instance status is success.

    <RouterA> display vrrp
  GigabitEthernet1/0/0 | Virtual Router 1
    State           : Master
    Virtual IP       : 10.1.1.10
    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
    Track NQA : user  test   Priority reduced : 40
    NQA state : success
    Create time      : 2012-05-22 17:36:56
    Last change time : 2012-05-22 17:37:00

    <RouterB> display vrrp
  GigabitEthernet1/0/0 | Virtual Router 1
    State            : Backup
    Virtual IP       : 10.1.1.10
    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      : 2012-05-22 17:37:00
    Last change time : 2012-05-22 17:37:04

Configuration Files

  • RouterA configuration file

    #
 sysname RouterA
#
interface GigabitEthernet1/0/0
  ip address 10.1.1.1 255.255.255.0
 vrrp vrid 1 virtual-ip 10.1.1.10
 vrrp vrid 1 priority 120
 vrrp vrid 1 preempt-mode timer delay 20
 vrrp vrid 1 track nqa user test reduced 40
#
interface GigabitEthernet2/0/0
  ip address 192.168.1.1 255.255.255.0
#
nqa test-instance user test                
 test-type icmp                             
 destination-address ipv4 20.1.1.2               
 frequency 20                              
 fail-percent 80
 probe-count 5                
 fail-percent 80
#           
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 10.1.1.2 255.255.255.0
 vrrp vrid 1 virtual-ip 10.1.1.10
#
interface GigabitEthernet2/0/0
  ip address 192.168.2.1 255.255.255.0
#
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 20.1.1.1 255.255.255.0
#
ospf 1
 area 0.0.0.0
  network 192.168.1.0 0.0.0.255
  network 20.1.1.0 0.0.0.255
#
return

  • RouterD configuration file

    #
 sysname RouterD
#
interface GigabitEthernet1/0/0
  ip address 192.168.2.2 255.255.255.0
#
interface GigabitEthernet2/0/0
  ip address 30.1.1.1 255.255.255.0
#
ospf 1
 area 0.0.0.0
  network 192.168.2.0 0.0.0.255
  network 30.1.1.0 0.0.0.255
#
return

  • RouterE configuration file

    #
 sysname RouterE
#
interface GigabitEthernet1/0/0
  ip address 20.1.1.2 255.255.255.0
#
interface GigabitEthernet2/0/0
  ip address 30.1.1.2 255.255.255.0
#
ospf 1
 area 0.0.0.0
  network 20.1.1.0 0.0.0.255
  network 30.1.1.0 0.0.0.255
#
return

  • Switch configuration file

    #
sysname Switch
#
vlan batch 10
#
interface GigabitEthernet1/0/0
 port hybrid pvid vlan 10
 port hybrid untagged vlan 10
#
interface GigabitEthernet2/0/0
 port hybrid pvid vlan 10
 port hybrid untagged vlan 10
#
return
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Updated: 2019-05-17

Document ID: EDOC1000174116

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