Network requirements – H3C Technologies H3C S12500 Series Switches User Manual
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Become Master : 2200ms left
Auth Type : None
Virtual IP : 192.168.0.10
Master IP : 192.168.0.102
VRRP Track Information:
Track Object : 1 State : Negative Pri Reduced : 20
# Display detailed information about VRRP group 1 on Switch B.
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 : 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 Switch A detects that the uplink fails through BFD, it decreases its
priority by 20 to make sure that Switch B can preempt as the master.
Static routing-Track-NQA collaboration configuration example
Network requirements
As shown in
, Switch A, Switch B, Switch C, and Switch D are connected to two segments
20.1.1.0/24 and 30.1.1.0/24. Configure static routes on these switches so that the two segments can
communicate with each other, and configure route backup to improve reliability of the network.
Switch 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 Switch A, with the next hop being Switch B and Switch C, respectively. These two static routes back
up each other, where:
•
The static route with Switch B as the next hop has a higher priority, and is the master route. If this
route is available, Switch A forwards packets to 30.1.1.0/24 through Switch B.
•
The static route with Switch 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 Switch
A forwards packets to 30.1.1.0/24 through Switch C.
Similarly, Switch 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 Switch D, with the next hop being Switch B and Switch C, respectively. These two
static routes back up each other, where:
•
The static route with Switch B as the next hop has a higher priority, and is the master route. If this
route is available, Switch D forwards packets to 20.1.1.0/24 through Switch B.
•
The static route with Switch C as the next hop acts as the backup route.