H3C Technologies H3C SR8800 - Manual (Page 137)

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The output shows that when the status of track entry 1 becomes Positive, Router A is the master and Router
B the backup.
# When the uplink of Router A goes down, the status of track entry 1 becomes Negative.
<RouterA> display track 1
Track ID: 1
Status: Negative
Duration: 0 days 0 hours 0 minutes 32 seconds
Notification delay: Positive 0, Negative 0 (in seconds)
Reference object:
BFD session:
Packet type: Echo
Interface : GigabitEthernet3/1/1
Remote IP : 1.1.1.2
Local IP : 1.1.1.1
# Display the detailed information of the VRRP group on Router A.
<RouterA> display vrrp verbose
IPv4 Standby Information:
Run Mode : Standard
Run Method : Virtual MAC
Total number of virtual routers : 1
Interface GigabitEthernet3/1/2
VRID : 1 Adver Timer : 1
Admin Status : Up State : Backup
Config Pri : 110 Running Pri : 90
Preempt Mode : Yes Delay Time : 0
Auth Type : None
Virtual IP : 192.168.0.10
Master IP : 192.168.0.102
VRRP Track Information:
Track Object : 1 State : Negative Pri Reduced : 20
# Display the detailed information of VRRP group 1 on Router B.
<RouterB> display vrrp verbose
IPv4 Standby Information:
Run Mode : Standard
Run Method : Virtual MAC
Total number of virtual routers : 1
Interface GigabitEthernet3/1/2
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
The output shows that when Router A detects that the uplink fails through BFD, it decreases its priority by
20 to guarantee that Router B can preempt as the master.