R3303-HP HSR6800 Routers High Availability Configuration Guide

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Local IP : 192.168.0.102

The output shows that when the status of the track entry becomes Positive, Router A is the master, and

Router B the backup.

# Enable VRRP state debugging and BFD event debugging on Router B.

<RouterB> terminal debugging

<RouterB> terminal monitor

<RouterB> debugging vrrp state

<RouterB> debugging bfd event

# When Router A fails, the following output is displayed on Router B.

%Apr 1 17:35:18:236 2013 HP VRRP/6/VRRP_STATUS_CHANGE: The status of IPv4 virt

ual router 1 (configured on GigabitEthernet1/0/1) changed from Backup to Master:

Timer expired.

*Apr 1 17:35:18:236 2013 HP VRRP/7/DebugState:

IPv4 GigabitEthernet1/0/1 | Virtual Router 1 : Backup --> Master reason: Time

r expired

%Apr 1 17:35:19:752 2013 HP BFD/5/BFD_CHANGE_FSM: -Slot=2; Sess[192.168.0.102/

192.168.0.101,4098/0,GE1/0/1,Echo], Sta: UP->DOWN, Diag: 5

*Apr 1 17:35:19:752 2013 HP BFD/7/EVENT: Send sess-down Msg, [Src:192.168.0.10

2,Dst:192.168.0.101,4098/0,GigabitEthernet1/0/1,Echo], instance:0, protocol:Track

# Display detailed information about the VRRP group on Router B.

<RouterB> display vrrp verbose

IPv4 Standby Information:

Run Mode : Standard

Run Method : Virtual MAC

Total number of virtual routers : 1

Interface GigabitEthernet1/0/1

VRID : 1 Adver Timer : 1

Admin Status : Up State : Master

Config Pri : 100 Running Pri : 100

Preempt Mode : Yes Delay Time : 0

Auth Type : None

Virtual IP : 192.168.0.10

Virtual MAC : 0000-5e00-0101

Master IP : 192.168.0.102

VRRP Track Information:

Track Object : 1 State : Negative Switchover

The output shows that when BFD detects that Router A fails, it notifies VRRP through the Track module to

change the status of Router B to master without waiting for a period three times the advertisement interval.

This ensures that a backup can quickly preempt as the master.

Configuring BFD for the VRRP master to monitor the uplink

Network requirements

• As shown in Figure 58, Router A and Router B belong to VRRP group 1, whose virtual IP address is

192.168.0.10.