H3C Technologies H3C S12500 Series Switches - Manual (Page 206)

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<SwitchA> 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
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
Destination: 120.1.1.0/24
Protocol: ISIS Process ID: 1
Preference: 10 Cost: 4
IpPrecedence: QosLcId:
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
BKTunnel ID: 0x0 BKLabel: NULL
State: Invalid Adv Age: 00h58m05s
Tag: 0
The output shows that Switch A and Switch B communicate through VLAN-interface 10. Then the
link over VLAN-interface 10 fails.
# Enable debugging on Switch A.
<SwitchA> debugging isis bfd-event
<SwitchA> terminal debugging
#Aug 8 14:54:05:362 2008 SwitchA 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 SwitchA
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 SwitchA
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 SwitchA IFNET/4/LINK UPDOWN: Vlan-interface10 link status
is DOWN
%Aug 8 14:54:05:366 2008 SwitchA IFNET/4/UPDOWN: Line protocol on the interface
Vlan-interface10 is DOWN
%Aug 8 14:54:05:367 2008 SwitchA ISIS/4/ADJLOG:ISIS-1-ADJCHANGE: Adjacency To
0000.0000.0002 (vlan10) DOWN, Level-2 Circuit Down.
%Aug 8 14:54:05:367 2008 SwitchA ISIS/4/ADJLOG:ISIS-1-ADJCHANGE: Adjacency To
0000.0000.0002 (vlan10) DOWN, Level-2 Adjacency clear.
%Aug 8 14:54:05:368 2008 SwitchA ISIS/4/ADJLOG:ISIS-1-ADJCHANGE: Adjacency To
0000.0000.0002 (vlan10) DOWN, Level-1 Circuit Down.