# Configure BFD on VLANIF20 of Switch B and set the minimum interval for sending the
packets and the minimum interval for receiving the packets to 100 ms and the local detection
time multiplier to 4.
[SwitchB] bfd
[SwitchB-bfd] quit
[SwitchB] interface vlanif 20
[SwitchB-Vlanif20] ospf bfd enable
[SwitchB-Vlanif20] ospf bfd min-tx-interval 100 min-rx-interval 100 detect-
multiplier 4
[SwitchB-Vlanif20] quit
# Run the display ospf bfd session all command on Switch A or Switch B. You can see that the
BFD state is Up.
Take Switch B for example. The display is as follows:
[SwitchB] display ospf bfd session all
OSPF Process 1 with Router ID 2.2.2.2
Area 0.0.0.0 interface 3.3.3.2(Vlanif20)'s BFD Sessions
NeighborId:1.1.1.1 AreaId:0.0.0.0 Interface: Vlanif20
BFDState:up rx :100 tx :100
Multiplier:4 BFD Local Dis:8198 LocalIpAdd:3.3.3.2
RemoteIpAdd:3.3.3.1 Diagnostic Info:No diagnostic information
Area 0.0.0.0 interface 2.2.2.2(Vlanif30)'s BFD Sessions
NeighborId:3.3.3.3 AreaId:0.0.0.0 Interface: Vlanif30
BFDState:up rx :1000 tx :1000
Multiplier:3 BFD Local Dis:8199 LocalIpAdd:2.2.2.2
RemoteIpAdd:2.2.2.1 Diagnostic Info:No diagnostic information
Step 6 Verify the configuration.
# Run the shutdown command on VLANIF 20 of Switch B to simulate a link fault.
[SwitchB] interface vlanif 20
[SwitchB-Vlanif20] shutdown
# View the routing table of Switch A.
<SwitchA> display ospf routing
OSPF Process 1 with Router ID 1.1.1.1 Routing Tables
Routing for Network
Destination Cost Type NextHop AdvRouter Area
172.16.1.1/24 3 Stub 1.1.1.2 2.2.2.2 0.0.0.0
3.3.3.0/24 1 Stub 3.3.3.1 1.1.1.1 0.0.0.0
2.2.2.0/24 2 Transit 1.1.1.2 3.3.3.3 0.0.0.0
1.1.1.0/24 1 Transit 1.1.1.1 1.1.1.1 0.0.0.0
Total Nets: 4 Intra Area: 4 Inter Area: 0 ASE: 0 NSSA: 0
As shown in the OSPF routing table, the backup link Switch A→Switch C→Switch B takes
effect after the main link fails. The next hop address of the route to 172.16.1.0/24 becomes
1.1.1.2.
----End
Configuration Files
l Configuration file of Switch A
#
sysname SwitchA
S6700 Series Ethernet Switches
Configuration Guide - IP Routing 4 OSPF Configuration
Issue 01 (2012-03-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
182
To Next Page
Loading...
