H3C Technologies H3C SR8800 - Manual (Page 36)

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120.1.1.0/24 Static 60 0 12.1.1.2 GE3/1/1
BFD for static routes configuration example (indirect session)
Network requirements
As shown in Figure 5 , Router A has a route to interface Loopback1 (2.2.2.9/32) on Router B, with the
outbound interface GigabitEthernet 3/1/1. Router B has a route to interface Loopback1 (1.1.1.9/32) on
Router A, with the outbound interface GigabitEthernet 3/1/1. Router D has a route to 1.1.1.9/32, with the
outbound interface GigabitEthernet 3/1/1, and a route to 2.2.2.9/32, with the outbound interface
GigabitEthernet 3/1/2.
Configure a static route to subnet 120.1.1.0/24 on Router A and configure a static route to subnet
121.1.1.0/24 on Router B. Enable BFD for both routes so that when the link between Router A and Router
B through Router D fails, BFD can detect the failure immediately and Router A and Router B can
communicate through Router C.
Figure 5 Network diagram
Device Interface IP address Device Interface IP address
Router A GE3/1/1 12.1.1.1/24 Router B GE3/1/1 11.1.1.2/24
GE3/1/2 10.1.1.102/24 GE3/1/2 13.1.1.2/24
Loop1 1.1.1.9/32 Loop1 2.2.2.9/32
Router C GE3/1/1 10.1.1.100/24 Router D GE3/1/1 12.1.1.2/24
GE3/1/2 13.1.1.2/24 GE3/1/2 11.1.1.1/24
Configuration procedure
1. Configure IP addresses for the interfaces. (Details not shown)
2. Configure BFD:
# Configure static routes on Router A and enable BFD control packet mode for the static route
through Router D.
system-view
[RouterA] interface loopback 1
[RouterA-LoopBack1] bfd min-transmit-interval 500
[RouterA-LoopBack1] bfd min-receive-interval 500
[RouterA-LoopBack1] bfd detect-multiplier 9
[RouterA-LoopBack1] quit
[RouterA] ip route-static 120.1.1.0 24 2.2.2.9 bfd control-packet bfd-source 1.1.1.9
[RouterA] ip route-static 120.1.1.0 24 GigabitEthernet 3/1/2 10.1.1.100 preference
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GE3/1
/2
GE3/1/2