H3C S12500G-AF Series Troubleshooting Manual page 18

Question
ARP
Are there ARP conflicts?
OSPF
Is the router ID of the
device unique on
network?
Are there a lot of errors in
the output from
display ospf
statistics error
command?
Are there severe route
flappings?
Is the OSPF status stable?
Routes
Is the default route
correct?
Are there any routing
loops?
Command or method
display logbuffer
the display ospf peer
the
display
statistics error
display
routing-table
statistics
display ospf peer
tracert
debug ip packet
14
Result
□OK
□Not OK
□Not related
□OK
□Not OK
□Not related
□OK
ospf
□Not OK
□Not related
□OK
ip
□Not OK
□Not related
□OK
□Not OK
□Not related
□OK
□Not OK
□Not related
Remarks
handshake interval as 3
seconds, 5 seconds, and 7
seconds for the groups,
respectively.
If the log contains ARP
conflict records, verify that
the hosts in conflict are
legitimate, and remove the
conflicts.
Change the router ID if it is
not unique on the network.
To restart route learning
after you remove the router
ID conflict, you must
execute the reset ospf
process command.
If a large number of OSPF
errors has occurred and
the number continues to
increase, collect the error
information for further
analysis.
Examine the statistics for
added and deleted routes
during the system uptime.
If route flapping occurs,
locate the flapping route
and the source device to
analyze the cause. You
can use the
display
command
ospf lsdb
multiple times to view the
age of routes and locate
the flapping route.
View the up time of the
OSPF neighbor.
Use the
tracert
command to trace the path
to a nonexistent network
(1.1.1.1, for example) to
check for routing loops. If a
routing loop exists, check
the configuration of the
involved devices for errors.
Adjust the route to remove
the loop.
Use the debug ip packet
command to check for