Configuring Bfd For A Vrrp Backup To Monitor The Master - HP A5830 series Configuration Manual

# Display detailed information about VRRP group 1 on Switch A when a fault is on the link between
Switch A and Switch C.
IPv4 Standby Information:
Run Mode
Run Method
Total number of virtual routers : 1
Interface Vlan-interface2
VRID
Admin Status
Config Pri
Preempt Mode
Become Master
Auth Type
Virtual IP
Master IP
VRRP Track Information:
Track Object
# Display detailed information about VRRP group 1 on Switch B when a fault is on the link between
Switch A and Switch C.
[SwitchB-Vlan-interface2] display vrrp verbose
IPv4 Standby Information:
Run Mode
Run Method
Total number of virtual routers : 1
Interface Vlan-interface2
VRID
Admin Status
Config Pri
Preempt Mode
Auth Type
Virtual IP
Virtual MAC
Master IP
The output shows that when a fault is on the link between Switch A and Switch C, the priority of Switch
A decreases to 80. Switch A becomes the backup, and Switch B becomes the master. Packets from Host
A to Host B are forwarded through Switch B.

Configuring BFD for a VRRP backup to monitor the master

Network requirements
As shown in
•
192.168.0.10.
The default gateway of the hosts in the LAN is 192.168.0.10. When Switch A works normally, the
•
hosts in the LAN access the external network through Switch A. When Switch A fails, the hosts in
the LAN access the external network through Switch B.
If BFD is not configured, when the master in a VRRP group fails, the backup cannot become the
•
master until the configured timeout timer expires. The timeout is generally three to four seconds,
: Standard
: Virtual MAC
: 1
: Up
: 110
: Yes
: 2200ms left
: Simple
: 10.1.1.10
: 10.1.1.2
: 1
: Standard
: Virtual MAC
: 1
: Up
: 100
: Yes
: Simple
: 10.1.1.10
: 0000-5e00-0101
: 10.1.1.2
46, Switch A and Switch B belong to VRRP group 1, whose virtual IP address is
Figure
Adver Timer : 5
State : Backup
Running Pri : 80
Delay Time : 5
Key : hello
State : Negative
Adver Timer : 5
State : Master
Running Pri : 100
Delay Time : 5
Key : hello
170
Pri Reduced : 30