Example: Configuring VRRP-Track-route management collaboration

As shown in Figure 64:

• 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.

• BGP peer relationships are established between Switch A and Switch C and between Switch B and Switch D. Switch C and Switch D advertise the default route 0.0.0.0/0 to Switch A and Switch B.

Configure VRRP-Track-route management collaboration to meet the following requirements:

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

• When VRRP detects the removal of the default route from the routing table of Switch A through route management, 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. Configure the IP address of each interface, as shown in Figure 64. (Details not shown.)

2. Establish an IBGP peer relationship between Switch A and Switch C, and configure Switch C to advertise the default route 0.0.0.0/0 to Switch A.

   <SwitchA> system-view
   [SwitchA] bgp 100
   [SwitchA-bgp-default] peer 10.1.2.2 as-number 100
   [SwitchA-bgp-default] address-family ipv4
   [SwitchA-bgp-default-ipv4] peer 10.1.2.2 enable
   <SwitchC> system-view
   [SwitchC] bgp 100
   [SwitchC-bgp-default] peer 10.1.2.1 as-number 100
   [SwitchC-bgp-default] address-family ipv4
   [SwitchC-bgp-default-ipv4] peer 10.1.2.1 enable
   [SwitchC-bgp-default-ipv4] peer 10.1.2.1 default-route-advertise
   [SwitchC-bgp-default-ipv4] quit
   

3. Configure Switch B and Switch D in the same way Switch A and Switch C are configured. (Details not shown.)

4. Configure Track and VRRP on Switch A:

   # Configure track entry 1, and associate it with the default route 0.0.0.0/0.

   [SwitchA] track 1 ip route 0.0.0.0 0.0.0.0 reachability
   

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

   [SwitchA] interface vlan-interface 2
   [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
   

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

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

5. On Switch B, create VRRP group 1, and configure virtual IP address 10.1.1.10 for the group.

   <SwitchB> system-view
   [SwitchB] interface vlan-interface 2
   [SwitchB-Vlan-interface2] vrrp vrid 1 virtual-ip 10.1.1.10
   [SwitchB-Vlan-interface2] quit
   

# 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] display vrrp verbose
IPv4 Virtual Router Information:
 Running Mode       : Standard
 Total number of virtual routers : 1
   Interface Vlan-interface2
     VRID             : 1               Adver Timer  : 100
     Admin Status     : Up              State        : Master
     Config Pri       : 110             Running Pri  : 110
     Preempt Mode     : Yes             Delay Time   : 0
     Auth Type        : None
     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] display vrrp verbose
IPv4 Virtual Router Information:
 Running Mode       : Standard
 Total number of virtual routers : 1
   Interface Vlan-interface2
     VRID             : 1               Adver Timer  : 100
     Admin Status     : Up              State        : Backup
     Config Pri       : 100             Running Pri  : 100
     Preempt Mode     : Yes             Delay Time   : 0
     Become Master    : 2200ms left
     Auth Type        : None
     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.

# Disable Switch C from exchanging routing information with Switch A so that the default route 0.0.0.0/0 is removed from the routing table of Switch A.

[SwitchC-bgp-default-ipv4] undo peer 10.1.2.1 enable

# 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] display vrrp verbose
IPv4 Virtual Router Information:
 Running Mode      : Standard
 Total number of virtual routers : 1
   Interface Vlan-interface2
     VRID             : 1               Adver Timer  : 100
     Admin Status     : Up              State        : Backup
     Config Pri       : 110             Running Pri  : 80
     Preempt Mode     : Yes             Delay Time   : 0
     Become Master    : 2200ms left
     Auth Type        : None
     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] display vrrp verbose
IPv4 Virtual Router Information:
 Running Mode      : Standard
 Total number of virtual routers : 1
   Interface Vlan-interface2
     VRID             : 1               Adver Timer  : 100
     Admin Status     : Up              State        : Master
     Config Pri       : 100             Running Pri  : 100
     Preempt Mode     : Yes             Delay Time   : 0
     Auth Type        : None
     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.