H3C Technologies H3C SecBlade LB Cards - Manual (Page 112)

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# When the master route fails, the hosts in 20.1.1.0/24 can still communicate with the hosts in
30.1.1.0/24.
[LBA] ping -a 20.1.1.1 30.1.1.1
PING 30.1.1.1: 56 data bytes, press CTRL_C to break
Reply from 30.1.1.1: bytes=56 Sequence=1 ttl=254 time=2 ms
Reply from 30.1.1.1: bytes=56 Sequence=2 ttl=254 time=1 ms
Reply from 30.1.1.1: bytes=56 Sequence=3 ttl=254 time=1 ms
Reply from 30.1.1.1: bytes=56 Sequence=4 ttl=254 time=2 ms
Reply from 30.1.1.1: bytes=56 Sequence=5 ttl=254 time=1 ms
--- 30.1.1.1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 1/1/2 ms
# The output on LB B is similar to that on LB A. When the master route fails, the hosts in
30.1.1.0/24 can still communicate with the hosts in 20.1.1.0/24.
[LBB] ping -a 30.1.1.1 20.1.1.1
PING 20.1.1.1: 56 data bytes, press CTRL_C to break
Reply from 20.1.1.1: bytes=56 Sequence=1 ttl=254 time=2 ms
Reply from 20.1.1.1: bytes=56 Sequence=2 ttl=254 time=1 ms
Reply from 20.1.1.1: bytes=56 Sequence=3 ttl=254 time=1 ms
Reply from 20.1.1.1: bytes=56 Sequence=4 ttl=254 time=1 ms
Reply from 20.1.1.1: bytes=56 Sequence=5 ttl=254 time=1 ms
--- 20.1.1.1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 1/1/2 ms
VRRP-Track-interface management collaboration configuration
example
In this example, the master monitors the uplink interface.
Network requirements
• As shown in Figure 45 , Host A needs to access Host B on the Internet. The default gateway of Host
A is 10.1.1.10/24.
• LB A and LB B belong to VRRP group 1, whose virtual IP address is 10.1.1.10.
• When LB A works properly, packets from Host A to Host B are forwarded through LB A. When VRRP
detects that a fault is on the uplink interface of LB A through the interface management module,
packets from Host A to Host B are forwarded through LB B.