H3C Technologies H3C SR8800 - Manual (Page 208)

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# Display the BFD information of Router A.
<RouterA> 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 GE3/1/1
# Display route 120.1.1.0/24 on Router A, and you can see that Router A and Router B
communicate through the Layer-2 switch.
<RouterA> 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: GigabitEthernet3/1/1
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: GigabitEthernet3/1/2
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 debugging on Router A.
<RouterA> debugging isis bfd-event
<RouterA> terminal debugging
# When the link between Router B and the Layer-2 switch fails, BFD can quickly detect the failure.
#Aug 8 14:54:05:362 2008 RouterA IFNET/4/INTERFACE UPDOWN:
Trap 1.3.6.1.6.3.1.1.5.3<linkDown>: Interface 983041 is Down, ifAdminStatus is 1,
ifOperStatus is 2
#Aug 8 14:54:05:363 2008 RouterA
ISIS/4/ADJ_CHANGE:TrapID(1.3.6.1.2.1.138.0.17<isisAdjacencyChange>), ISIS Level-2
Adjencency IN Circuit-983041 State Change.
#Aug 8 14:54:05:364 2008 RouterA
ISIS/4/ADJ_CHANGE:TrapID(1.3.6.1.2.1.138.0.17<isisAdjacencyChange>), ISIS Level-1
Adjencency IN Circuit-983041 State Change.
%Aug 8 14:54:05:365 2008 RouterA IFNET/4/LINK UPDOWN: GigabitEthernet3/1/1 link
status is DOWN
%Aug 8 14:54:05:366 2008 RouterA IFNET/4/UPDOWN: Line protocol on the interface
GigabitEthernet3/1/1 is DOWN
%Aug 8 14:54:05:367 2008 RouterA ISIS/4/ADJLOG:ISIS-1-ADJCHANGE: Adjacency To
0000.0000.0002 (GE3/1/1) DOWN, Level-2 Circuit Down.