Bfd for ospf configuration example, Network requirements – H3C Technologies H3C S5560 Series Switches User Manual

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Total Nets: 4

Intra Area: 4 Inter Area: 0 ASE: 0 NSSA: 0

# Display OSPF neighbors on Switch B to verify the neighbor relationship between Switch B and Switch
S.

<SwitchB> display ospf peer

OSPF Process 1 with Router ID 4.4.4.1

Neighbor Brief Information

Area: 0.0.0.0

Router ID Address Pri Dead-Time State Interface

3.3.3.1 14.14.14.2 1 39 Full/BDR Vlan200

# Display OSPF routes on Switch B to verify if Switch B has a route to the loopback interface on Switch
A.

<SwitchB> display ospf routing

OSPF Process 1 with Router ID 4.4.4.1

Routing Tables

Routing for Network

Destination Cost Type NextHop AdvRouter Area

44.44.44.44/32 0 Stub 44.44.44.44 4.4.4.1 0.0.0.0

14.14.14.0/24 1 Transit 14.14.14.1 4.4.4.1 0.0.0.0

22.22.22.22/32 2 Stub 14.14.14.2 2.2.2.1 0.0.0.0

12.12.12.0/24 2 Transit 14.14.14.2 2.2.2.1 0.0.0.0

Total Nets: 4

Intra Area: 4 Inter Area: 0 ASE: 0 NSSA: 0

The output shows that when an active/standby switchover occurs on Switch S, the neighbor relationships
and routing information on Switch A and Switch B have not changed, and the traffic from Switch A to
Switch B has not been impacted.

BFD for OSPF configuration example

Network requirements

As shown in

Figure 31

, run OSPF on Switch A, Switch B, and Switch C so that they are reachable to each

other at the network layer.

When the link over which Switch A and Switch B communicate through a Layer 2 switch fails, BFD
can quickly detect the failure and notify OSPF of the failure.

Switch A and Switch B then communicate through Switch C.

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