Mypower
S4100
Troubleshooting
Maipu Confidential & Proprietary Information
Page
90
of
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time, IP address of the neighbor interface and the local connection
interface.
D e b u g T o o l s
Command Description
debug ip ospf lsa [external|flooding|generate|grace-
restart|install|maxage|network|refresh|router|summary]
Trace the advertisement
of link status
debug ip ospf events [abr|asbr|grace-
restart|lsa|nssa|os|psm|snmp|spf|router|vlink]
Trace the events and
messages.
debug ip ospf packet [dd|detail|hello|ls-ack|ls-
request|ls-update|recv|send]
Trace the receiving and
sending of the packets.
Hello: received hello
packets
dd: Database description
packets
ls-request: Link state
request packets
ls-update: link state
update packets
ls-ack: link state update
acknowledgement packets
debug ip ospf psm [event|hello|ls-ack|ls-
upd|neighbor|packet|server]
Trace the sending of
OSPF hello packets
debug ip ospf route [ase|ia|install|spf|ispf]
Trace the calculation of
routing table.
debug ip ospf ifsm [events|status|timers]
Trace interface state
machine
debug ip ospf nfsm [events|status|timers]
Trace neighbor state
machine
OSPF Troubleshooting
Fault 1: Failed to create neighbor relation
Possible Reasons
Judging Methods and Solutions
1.
The configuration of
the two negotiation
parties are incorrect;
the expected OSPF
interface is not added
to the OSPF interface
How to find out the cause:
Use the show ip ospf neighbor command and no neighbors are
found for a long time.
Use the show ip ospf interface command to check whether the
expected interface is added to the OSPF.
Check the configuration of OSPF: network A.B.C..D[Network
number] A.B.C.D[OSPF wildcard bits is the reversal mask]
area Area_number
Solution: use the network command properly.
2.
The authentication
parameters
configured at the
OSPF interface of the
two negotiation
parties are not
How to find out the cause:
Use the show ip ospf neighbor command and no neighbors are
found for a long time.
Open the debug ip ospf packet hello to print the following error
information: OSPF RECV Area 0.0.0.0 172.160.3.9 -> 224.0.0.5:
OSPF: Authentication error;
