H3C S5800 Series Configuration Manual page 216

Preference: 0
NextHop: 192.168.0.100
BkNextHop: 0.0.0.0
RelyNextHop: 0.0.0.0
Tunnel ID: 0x0
State: Active Adv
Tag: 0
Destination: 120.1.1.0/24
Protocol: ISIS
Preference: 10
NextHop: 10.1.1.100
BkNextHop: 0.0.0.0
RelyNextHop: 0.0.0.0
Tunnel ID: 0x0
State: Invalid Adv
Tag: 0
# Enable BFD debugging on Switch A.
<SwitchA> debugging bfd event
<SwitchA> debugging isis bfd-event
<SwitchA> 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<linkDown>:
ifOperStatus is 2
#Aug
ISIS/4/ADJ_CHANGE:TrapID(1.3.6.1.2.1.138.0.17<isisAdjacencyChange>),
Adjencency IN Circuit-983041 State Change.
#Aug
ISIS/4/ADJ_CHANGE:TrapID(1.3.6.1.2.1.138.0.17<isisAdjacencyChange>),
Adjencency IN Circuit-983041 State Change.
%Aug 8 14:54:05:365 2008 SwitchA IFNET/4/LINK UPDOWN: vlan10: link status is DOWN
%Aug 8 14:54:05:366
Vlan-interface10 is DOWN
%Aug 8 14:54:05:367
0000.0000.0002 (vlan10) DOWN, Level-2 Circuit Down.
%Aug 8 14:54:05:367
0000.0000.0002 (vlan10) DOWN, Level-2 Adjacency clear.
%Aug 8 14:54:05:368
0000.0000.0002 (vlan10) DOWN, Level-1 Circuit Down.
%Aug 8 14:54:05:369
0000.0000.0002 (vlan10) DOWN, Level-1 Adjacency clear.
*Aug 8 14:54:05:370 2008 SwitchA ISIS/6/ISIS:
ISIS-1-BFD: Success to send msg. Msg type 1 delete session. IfPhyIndex: 5 ,DstIPAddr:
10.1.0.100 , SrcIPAddr:10.1.0.102. NeighborType:Level-2.
*Aug 8 14:54:05:370 2008 SwitchA ISIS/6/ISIS:
ISIS-1-BFD: Success to send msg. Msg type 1 delete session. IfPhyIndex: 5 ,DstIPAddr:
10.1.0.100 , SrcIPAddr:10.1.0.102. NeighborType:Level-1.
# Display the BFD information of Switch A. You can see that Switch A has removed its neighbor
relationship with Switch B and therefore no information is output.
<SwitchA> display bfd session
Cost: 2
Interface: Vlan-interface10
BkInterface:
Neighbor : 0.0.0.0
Label: NULL
Age: 00h58m10s
Process ID: 1
Cost: 4
Interface: Vlan-interface11
BkInterface:
Neighbor : 0.0.0.0
Label: NULL
Age: 00h58m05s
Interface
8 14:54:05:363
8 14:54:05:364
2008 SwitchA IFNET/4/UPDOWN:
2008 SwitchA ISIS/4/ADJLOG:ISIS-1-ADJCHANGE:
2008 SwitchA ISIS/4/ADJLOG:ISIS-1-ADJCHANGE:
2008 SwitchA ISIS/4/ADJLOG:ISIS-1-ADJCHANGE:
2008 SwitchA ISIS/4/ADJLOG:ISIS-1-ADJCHANGE:
5-61
983041 is Down, ifAdminStatus
2008
2008
Line protocol
is 1,
SwitchA
ISIS Level-2
SwitchA
ISIS Level-1
on the interface
Adjacency To
Adjacency To
Adjacency To
Adjacency To