H3C Technologies H3C S7500E Series Switches - Manual (Page 155)

10-22
Admin Status : Up State : Master
Config Pri : 100 Running Pri : 100
Preempt Mode : Yes Delay Time : 5
Auth Type : None
Virtual IP : 202.38.160.111
Virtual MAC : 0000-5e00-0101
Master IP : 202.38.160.2
The above information shows that when Switch A fails, Switch B becomes the master, and
packets sent from Host A to Host B are forwarded by Switch B.
# After Switch A resumes normal operation, use the display vrrp verbose command to display
the detailed information of VRRP group 1 on Switch A.
[SwitchA-Vlan-interface2] display vrrp verbose
IPv4 Standby Information:
Run Mode : Standard
Run Method : Virtual MAC
Total number of virtual routers : 1
Interface Vlan-interface2
VRID : 1 Adver Timer : 1
Admin Status : Up State : Master
Config Pri : 110 Running Pri : 110
Preempt Mode : Yes Delay Time : 5
Auth Type : None
Virtual IP : 202.38.160.111
Virtual MAC : 0000-5e00-0101
Master IP : 202.38.160.1
The above information shows that after Switch A resumes normal operation, it becomes the
master, and packets sent from host A to host B are forwarded by Switch A.
VRRP Interface Tracking Configuration Example
Network requirements
z Host A wants to access Host B on the Internet, using 202.38.160.111/24 as its default
gateway.
z Switch A and Switch B belong to VRRP group 1 with the virtual IP address of
202.38.160.111/24.
z If Switch A operates normally, packets sent from Host A to Host B are forwarded by Switch
A; if VLAN-interface 3 through which Switch A connects to the Internet is not available,
packets sent from Host A to Host B are forwarded by Switch B.
z To prevent attacks to the VRRP group from illegal users by using spoofed packets,
configure the authentication mode as plain text to authenticate the VRRP packets in VRRP
group 1, and specify the authentication key as hello.