H3C Technologies H3C S12500 Series Switches - Manual (Page 30)

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Total Session Num: 1 Init Mode: Active
Session Working Under Ctrl Mode:
LD/RD SourceAddr DestAddr State Holdtime Interface
4/7 12.1.1.1 12.1.1.2 Up 2000ms Vlan10
# Display static routes on Switch A.
<SwitchA> display ip routing-table protocol static
Public Routing Table : Static
Summary Count : 2
Static Routing table Status : <Active>
Summary Count : 1
Destination/Mask Proto Pre Cost NextHop Interface
120.1.1.0/24 Static 60 0 12.1.1.2 Vlan10
Direct Routing table Status : <Inactive>
Summary Count : 1
Destination/Mask Proto Pre Cost NextHop Interface
120.1.1.0/24 Static 65 0 10.1.1.100 Vlan11
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.
<SwitchA> debugging bfd event
<SwitchA> debugging bfd scm
<SwitchA> terminal debugging
%Jul 27 10:18:18:672 2007 SwitchA BFD/4/LOG:Sess[12.1.1.1/12.1.1.2, Vlan10,Ctrl],
Sta: UP->DOWN, Diag: 1
*Jul 27 10:18:18:672 2007 SwitchA BFD/7/EVENT:Send sess-down Msg,
[Src:12.1.1.1,Dst:12.1.1.2, Vlan10,Ctrl], instance:0, protocol:STATIC
*Jul 27 10:18:19:172 2007 SwitchA BFD/7/EVENT:Receive Delete-sess,
[Src:12.1.1.1,Dst:12.1.1.2, Vlan10,Ctrl], Direct, Instance:0x0, Proto:STATIC
*Jul 27 10:18:19:172 2007 SwitchA BFD/7/EVENT:Notify driver to stop receiving bf
The output shows that Switch A can quickly detect the failure.
# Display static routes on Switch A again.
<SwitchA> display ip routing-table protocol static
Public Routing Table : Static
Summary Count : 2
Static Routing table Status : <Active>
Summary Count : 1
Destination/Mask Proto Pre Cost NextHop Interface
120.1.1.0/24 Static 65 0 10.1.1.100 Vlan11
Static Routing table Status : <Inactive>
Summary Count : 1
Destination/Mask Proto Pre Cost NextHop Interface
120.1.1.0/24 Static 60 0 12.1.1.2 Vlan10
The output shows that Switch A communicates with Switch B through VLAN-interface 11.