Ospf Fault Diagnosis And Troubleshooting - 3Com 7700 Configuration Manual

OSPF Fault Diagnosis
and Troubleshooting
[Switch A] ospf
[Switch A-ospf] area 0
[Switch A-ospf-area-0.0.0.0] network 196.1.1.0 0.0.0.255
2 Configure Switch B:
[Switch B] interface vlan-interface 7
[Switch B-Vlan-interface7] ip address 196.1.1.2 255.255.255.0
[Switch B] interface vlan-interface 8
[Switch B-Vlan-interface8] ip address 197.1.1.2 255.255.255.0
[Switch B] router id 2.2.2.2
[Switch B] ospf
[Switch B-ospf] area 0
[Switch B-ospf-area-0.0.0.0] network 196.1.1.0 0.0.0.255
[Switch B-ospf-area-0.0.0.0] quit
[Switch B-ospf] area 1
[Switch B-ospf-area-0.0.0.1] network 197.1.1.0 0.0.0.255
[Switch B-ospf-area-0.0.0.1] vlink-peer 3.3.3.3
3 Configure Switch C:
[Switch C] interface Vlan-interface 1
[Switch C-Vlan-interface1] ip address 152.1.1.1 255.255.255.0
[Switch C] interface Vlan-interface 1
[Switch C-Vlan-interface1] ip address 152.1.1.1 255.255.255.0
[Switch C] interface Vlan-interface 2
[Switch C-Vlan-interface2] ip address 197.1.1.1 255.255.255.0
[Switch C] router id 3.3.3.3
[Switch C] ospf
[Switch C-ospf] area 1
[Switch C-ospf-area-0.0.0.1] network 197.1.1.0 0.0.0.255
[Switch C-ospf-area-0.0.0.1] vlink-peer 2.2.2.2
[Switch C-ospf-area-0.0.0.1] quit
[Switch C-ospf] area 2
[Switch C-ospf-area-0.0.0.2] network 152.1.1.0 0.0.0.255
1 OSPF has been configured according to the previous procedures, but OSPF on the
router does not run normally.
Troubleshoot locally
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Check whether the protocol between two directly connected routers is
operating normally. The normal sign is the peer state machine between the two
routers reaches the FULL state. (Note: On a broadcast or NBMA network, if the
interfaces for two routers are in the DROther state, the peer state machine for
the two routers is in the 2-way state, instead of the FULL state. The peer state
machine between the DR or BDR and all the other routers is in the FULL state.
Execute the display ospf peer command to view peers.
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Execute the display ospf interface command to view OSPF information in
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the interface.
Execute the ping command to test whether the physical connections and
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the lower level protocol operate normally. If the local router cannot ping the
peer router, it indicates that faults have occurred to the physical link and the
lower level protocol.
OSPF 97