H3C Technologies H3C S7500E Series Switches - Manual (Page 202)

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# Enable BFD on Switch B and configure BFD parameters.
[SwitchB] bfd session init-mode active
[SwitchB] interface vlan-interface 10
[SwitchB-Vlan-interface10] isis bfd enable
[SwitchB-Vlan-interface10] bfd min-receive-interval 500
[SwitchB-Vlan-interface10] bfd min-transmit-interval 500
[SwitchB-Vlan-interface10] bfd detect-multiplier 8
[SwitchB-Vlan-interface10] return
Verify the configuration.
The following configurations are made on Switch A. Configurations for Switch B are similar and thus
are omitted here.
# Display the BFD information of Switch A.
display bfd session
Total Session Num: 1 Init Mode: Active
Session Working Under Ctrl Mode:
LD/RD SourceAddr DestAddr State Holdtime Interface
3/1 10.1.0.102 10.1.0.100 Up 1700ms vlan10
# Display route 120.1.1.0/24 on Switch A, and you can see that Switch A and Switch B communicate
through the Layer-2 switch.
display ip routing-table 120.1.1.0 verbose
Routing Table : Public
Summary Count : 2
Destination: 120.1.1.0/24
Protocol: ISIS Process ID: 0
Preference: 0 Cost: 2
NextHop: 192.168.0.100 Interface: Vlan-interface10
BkNextHop: 0.0.0.0 BkInterface:
RelyNextHop: 0.0.0.0 Neighbor : 0.0.0.0
Tunnel ID: 0x0 Label: NULL
State: Active Adv Age: 00h58m10s
Tag: 0
Destination: 120.1.1.0/24
Protocol: ISIS Process ID: 1
Preference: 10 Cost: 4
NextHop: 10.1.1.100 Interface: Vlan-interface11
BkNextHop: 0.0.0.0 BkInterface:
RelyNextHop: 0.0.0.0 Neighbor : 0.0.0.0
Tunnel ID: 0x0 Label: NULL
State: Invalid Adv Age: 00h58m05s
Tag: 0
# Enable BFD debugging on Switch A.
debugging isis bfd-event
terminal debugging
# When the link between Switch B and the Layer-2 switch fails, BFD can quickly detect the failure.
#Aug 8 14:54:05:362 2008 SwitchA IFNET/4/INTERFACE UPDOWN:
Trap 1.3.6.1.6.3.1.1.5.3: Interface 983041 is Down, ifAdminStatus is 1,
ifOperStatus is 2