H3C Technologies H3C S12500 Series Switches - Manual (Page 145)

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4. Verify the configuration:
The following operations are performed on Switch A. The operations on Switch B and Switch C
are similar, and thus are not shown.
# Display the BFD information on Switch A.
display bfd session
Total Session Num: 1 Init Mode: Active
Session Working Under Ctrl Mode:
LD/RD SourceAddr DestAddr State Holdtime Interface
3/1 192.168.0.102 192.168.0.100 Up 1700ms vlan10
# Display routes destined for 120.1.1.0/24 on Switch A.
display ip routing-table 120.1.1.0 verbose
Routing Table : Public
Summary Count : 1
Destination: 120.1.1.0/24
Protocol: OSPF Process ID: 1
Preference: 0 Cost: 2
IpPrecedence: QosLcId:
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
BKTunnel ID: 0x0 BKLabel: NULL
State: Active Adv Age: 00h58m10s
Tag: 0
The output shows that Switch A communicates with Switch B through VLAN-interface 10. Then the
link over VLAN-interface 10 fails.
# Enable BFD debugging on Switch A.
debugging bfd scm
debugging bfd event
debugging ospf event
terminal debugging
%Nov 12 18:34:48:823 2005 SwitchA BFD/5/LOG: Sess[192.168.0.102/192.168.0.100,
vlan10], Sta : UP->DOWN, Diag: 1
%Nov 12 18:34:48:824 2005 SwitchA RM/4/RMLOG:OSPF-NBRCHANGE: Process 1, Neighbour
192.168.0.102 (vlan10) from Full to Down
*0.50673825 SwitchA BFD/8/SCM:Sess[192.168.0.102/192.168.0.100, vlan10],Oper: Reset
*0.50673825 SwitchA BFD/8/EVENT:Send sess-down Msg, [Src: 192.168.0.102, Dst:
192.168.0.100, vlan10] Protocol: OSPF
*0.50673826 SwitchA RM/7/RMDEBUG:OSPF-BFD: Message Type rcv BFD down, Connect Type
direct-connect, Src IP Address 192.168.0.102, Src IFIndex 5, Dst IP Address
192.168.0.100
*0.50673827 SwitchA RM/7/RMDEBUG:OSPF-BFD: Message Type delete session, Connect Type
direct-connect, Src IP Address 192.168.0.102, Src IFIndex 5, Dst IP Address
192.168.0.100
OSPF 1: Nbr 192.168.0.100 Rcv KillNbr State Full -> Down.
*0.50673829 SwitchA BFD/8/EVENT:Receive Delete-sess, [Src: 192.168.0.102, Dst:
192.168.0.100, vlan10], Direct, Proto:OSPF
*0.50673830 SwitchA BFD/8/SCM:Sess[192.168.0.102/192.168.0.100, vlan10], Oper: Del
application(OSPF)