Network requirements, Vrrp interface tracking configuration example – H3C Technologies H3C MSR 50 User Manual

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Interface Ethernet1/1

VRID : 1 Adver Timer : 100

Admin Status : Up State : Master

Config Pri : 100 Running Pri : 100

Preempt Mode : Yes Delay Time : 5

Auth Type : None

Virtual IP : FE80::10

1::10

Virtual MAC : 0000-5e00-0201

Master IP : FE80::2

The output shows that when Router A fails, Router B becomes the master, and packets sent from

Host A to Host B are forwarded by Router B.
# After Router A resumes normal operation, use the display vrrp ipv6 verbose command to display
the detailed information about VRRP group 1 on Router A.

[RouterA-Ethernet1/1] display vrrp ipv6 verbose

IPv6 Standby Information:

Run Mode : Standard

Run Method : Virtual MAC

Total number of virtual routers : 1

Interface Ethernet1/1

VRID : 1 Adver Timer : 100

Admin Status : Up State : Master

Config Pri : 110 Running Pri : 110

Preempt Mode : Yes Delay Time : 5

Auth Type : None

Virtual IP : FE80::10

1::10

Virtual MAC : 0000-5e00-0201

Master IP : FE80::1

The output shows that after Router A resumes normal operation, it becomes the master, and

packets sent from Host A to Host B are forwarded by Router A.

VRRP interface tracking configuration example

Network requirements

Router A and Router B belong to VRRP group 1 with the virtual IPv6 addresses of 1::10/64 and
FE80::10.

Host A wants to access Host B on the Internet, and learns 1::10/64 as its default gateway through
RA messages sent by the routers.

When Router A operates correctly, Router A forwards the packets that Host A sends to Host B. If
interface Ethernet 1/1 through which Router A connects to the Internet is not available, Router B

forwards the packets that Host A sends to Host B.

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. Specify the

authentication key as hello.

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