H3C Technologies H3C SecPath F1000-E - Manual (Page 304)

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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 Device A detects that the uplink fails through BFD, it decreases its priority by
20 to ensure that Device B can preempt as the master.
Static Routing-Track-NQA Collaboration Configuration
Example
Network requirements
As shown in Figure 5 , Device A, Device B, Device C, and Device D are connected to two segments
20.1.1.0/24 and 30.1.1.0/24. Configure static routes on these devices so that the two segments can
communicate with each other, and configure route backup to improve reliability of the network.
Device 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 Device A, with the next hop being Device B and Device C respectively. These two static routes
back up each other, where:
• The static route with Device B as the next hop has a higher priority, and is the master route. If this
route is available, Device A forwards packets to 30.1.1.0/24 through Device B.
• The static route with Device 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 Device
A forwards packets to 30.1.1.0/24 through Device C.
Similarly, Device 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 Device D, with the next hop being Device B and Device C respectively. These two
static routes back up each other, where:
• The static route with Device B as the next hop has a higher priority, and is the master route. If this
route is available, Device D forwards packets to 20.1.1.0/24 through Device B.
• The static route with Device 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 Device
D forwards packets to 20.1.1.0/24 through Device C.