Example: Configuring VRRP-Track-NQA collaboration

As shown in Figure 58:

• Host A requires access to Host B. The default gateway of Host A is 10.1.1.10/24.

• Switch A and Switch B belong to VRRP group 1. The virtual IP address of VRRP group 1 is 10.1.1.10.

Configure VRRP-Track-NQA collaboration to monitor the uplink on the master and meet the following requirements:

• When Switch A operates correctly, Switch A forwards packets from Host A to Host B.

• When NQA detects a fault on the uplink of Switch A, Switch B forwards packets from Host A to Host B.

	IMPORTANT: By default, interfaces on the device are disabled (in ADM or Administratively Down state). To have an interface operate, you must use the undo shutdown command to enable that interface.

1. Create VLANs and assign ports to them. Configure the IP address of each VLAN interface, as shown in Figure 58. (Details not shown.)

2. Configure an NQA operation on Switch A:

   # Create an NQA operation with administrator name admin and operation tag test.

   <SwitchA> system-view
   [SwitchA] nqa entry admin test
   

   # Specify the ICMP echo operation type.

   [SwitchA-nqa-admin-test] type icmp-echo
   

   # Specify 10.1.2.2 as the destination address of ICMP echo requests.

   [SwitchA-nqa-admin-test-icmp-echo] destination ip 10.1.2.2
   

   # Configure the ICMP echo operation to repeat every 100 milliseconds.

   [SwitchA-nqa-admin-test-icmp-echo] frequency 100
   

   # Configure reaction entry 1, specifying that five consecutive probe failures trigger the Track module.

   [SwitchA-nqa-admin-test-icmp-echo] reaction 1 checked-element probe-fail threshold-type consecutive 5 action-type trigger-only
   [SwitchA-nqa-admin-test-icmp-echo] quit
   

   # Start the NQA operation.

   [SwitchA] nqa schedule admin test start-time now lifetime forever
   

3. On Switch A, configure track entry 1, and associate it with reaction entry 1 of the NQA operation.

   [SwitchA] track 1 nqa entry admin test reaction 1
   

4. Configure VRRP on Switch A:

   # Specify VRRPv2 to run on VLAN-interface 2.

   [SwitchA] interface vlan-interface 2
   [SwitchA-Vlan-interface2] vrrp version 2
   

   # Create VRRP group 1, and configure virtual IP address 10.1.1.10 for the group.

   [SwitchA-Vlan-interface2] vrrp vrid 1 virtual-ip 10.1.1.10
   

   # Set the priority of Switch A to 110 in VRRP group 1.

   [SwitchA-Vlan-interface2] vrrp vrid 1 priority 110
   

   # Set the authentication mode of VRRP group 1 to simple, and the authentication key to hello.

   [SwitchA-Vlan-interface2] vrrp vrid 1 authentication-mode simple hello
   

   # Configure the master to send VRRP packets every 500 centiseconds.

   [SwitchA-Vlan-interface2] vrrp vrid 1 timer advertise 500
   

   # Configure Switch A to operate in preemptive mode and set the preemption delay to 5000 centiseconds.

   [SwitchA-Vlan-interface2] vrrp vrid 1 preempt-mode timer delay 5000
   

   # Associate VRRP group 1 with track entry 1 and decrease the router priority by 30 when the state of track entry 1 changes to negative.

   [SwitchA-Vlan-interface2] vrrp vrid 1 track 1 priority reduced 30
   

5. Configure VRRP on Switch B:

   # Specify VRRPv2 to run on VLAN-interface 2.

   <SwitchB> system-view
   [SwitchB] interface vlan-interface 2
   [SwitchB-Vlan-interface2] vrrp version 2
   

   # Create VRRP group 1, and configure virtual IP address 10.1.1.10 for the group.

   [SwitchB-Vlan-interface2] vrrp vrid 1 virtual-ip 10.1.1.10
   

   # Set the authentication mode of VRRP group 1 to simple, and the authentication key to hello.

   [SwitchB-Vlan-interface2] vrrp vrid 1 authentication-mode simple hello
   

   # Configure the master to send VRRP packets every 500 centiseconds.

   [SwitchB-Vlan-interface2] vrrp vrid 1 timer advertise 500
   

   # Configure Switch B to operate in preemptive mode and set the preemption delay to 5000 centiseconds.

   [SwitchB-Vlan-interface2] vrrp vrid 1 preempt-mode timer delay 5000
   

# Ping Host B from Host A to verify that Host B is reachable. (Details not shown.)

# Display detailed information about VRRP group 1 on Switch A.

[SwitchA-Vlan-interface2] display vrrp verbose
IPv4 Virtual Router Information:
 Running Mode      : Standard
 Total number of virtual routers : 1
   Interface Vlan-interface2
     VRID             : 1               Adver Timer  : 500
     Admin Status     : Up              State        : Master
     Config Pri       : 110             Running Pri  : 110
     Preempt Mode     : Yes             Delay Time   : 5000
     Auth Type        : Simple          Key          : ******
     Virtual IP       : 10.1.1.10
     Virtual MAC      : 0000-5e00-0101
     Master IP        : 10.1.1.1
   VRRP Track Information:
     Track Object   : 1              State : Positive          Pri Reduced : 30

# Display detailed information about VRRP group 1 on Switch B.

[SwitchB-Vlan-interface2] display vrrp verbose
IPv4 Virtual Router Information:
 Running Mode      : Standard
 Total number of virtual routers : 1
   Interface Vlan-interface2
     VRID             : 1               Adver Timer  : 500
     Admin Status     : Up              State        : Backup
     Config Pri       : 100             Running Pri  : 100
     Preempt Mode     : Yes             Delay Time   : 5000
     Become Master    : 2200ms left
     Auth Type        : Simple          Key          : ******
     Virtual IP       : 10.1.1.10
     Master IP        : 10.1.1.1

The output shows that in VRRP group 1, Switch A is the master, and Switch B is a backup. Switch A forwards packets from Host A to Host B.

# Disconnect the link between Switch A and Switch C, and verify that Host A can still ping Host B. (Details not shown.)

# Display detailed information about VRRP group 1 on Switch A.

[SwitchA-Vlan-interface2] display vrrp verbose
IPv4 Virtual Router Information:
 Running Mode      : Standard
 Total number of virtual routers : 1
   Interface Vlan-interface2
     VRID             : 1               Adver Timer  : 500
     Admin Status     : Up              State        : Backup
     Config Pri       : 110             Running Pri  : 80
     Preempt Mode     : Yes             Delay Time   : 5000
     Become Master    : 2200ms left
     Auth Type        : Simple          Key          : ******
     Virtual IP       : 10.1.1.10
     Master IP        : 10.1.1.2
   VRRP Track Information:
     Track Object   : 1              State : Negative          Pri Reduced : 30

# Display detailed information about VRRP group 1 on Switch B.

[SwitchB-Vlan-interface2] display vrrp verbose
IPv4 Virtual Router Information:
 Running Mode      : Standard
 Total number of virtual routers : 1
   Interface Vlan-interface2
     VRID             : 1               Adver Timer  : 500
     Admin Status     : Up              State        : Master
     Config Pri       : 100             Running Pri  : 100
     Preempt Mode     : Yes             Delay Time   : 5000
     Auth Type        : Simple          Key          : ******
     Virtual IP       : 10.1.1.10
     Virtual MAC      : 0000-5e00-0101
     Master IP        : 10.1.1.2

The output shows that Switch A becomes the backup, and Switch B becomes the master. Switch B forwards packets from Host A to Host B.