H3C Technologies H3C MSR 50 - Manual (Page 50)

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IPv4 Standby Information:
Run Mode : Standard
Run Method : Virtual MAC
Total number of virtual routers : 1
Interface Ethernet1/2
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 make sure that Router B can preempt as the master.
Static routing-Track-NQA collaboration configuration example
Network requirements
As shown in Figure 14 , Router A, Router B, Router C, and Router D are connected to two segments
20.1.1.0/24 and 30.1.1.0/24. Configure static routes on these routers so that the two segments can
communicate with each other. Configure route backup to improve network reliability.
Router A is the default gateway of the hosts in segment 20.1.1.0/24. Two static routes to 30.1.1.0/24 exist
on Router A, with the next hop being Router B and Router C, respectively. These two static routes back up
each other, where:
• The static route with Router B as the next hop has a higher priority, and is the master route. If this
route is available, Router A forwards packets to 30.1.1.0/24 through Router B.
• The static route with Router C as the next hop acts as the backup route.
• Configure static routing-Track-NQA collaboration to determine whether the master route is
available in real time. If the master route is unavailable, the backup route takes effect, and Router
A forwards packets to 30.1.1.0/24 through Router C.
Similarly, Router D is the default gateway of the hosts in segment 30.1.1.0/24. Two static routes to
20.1.1.0/24 exist on Router D, with the next hop being Router B and Router C, respectively. These two
static routes back up each other, where:
• The static route with Router B as the next hop has a higher priority, and is the master route. If this
route is available, Router D forwards packets to 20.1.1.0/24 through Router B.
• The static route with Router C as the next hop acts as the backup route.
• Configure static routing-Track-NQA collaboration to determine whether the master route is
available in real time. If the master route is unavailable, the backup route takes effect, and Router
D forwards packets to 20.1.1.0/24 through Router C.