14
Question
Command or method
Result
Remarks
handshake interval as 3
seconds, 5 seconds, and 7
seconds for the groups,
respectively.
ARP
Are there ARP conflicts?
display logbuffer
□
OK
□
Not OK
□
Not related
If the log contains ARP
conflict records, verify that
the hosts in conflict are
legitimate, and remove the
conflicts.
OSPF
Is the router ID of the
device unique on the
network?
display ospf peer
□
OK
□
Not OK
□
Not related
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.
Are there a lot of errors in
the output from the
display ospf
statistics error
command?
display ospf
statistics error
□
OK
□
Not OK
□
Not related
If a large number of OSPF
errors has occurred and
the number continues to
increase, collect the error
information
for further
analysis.
Are there severe route
flappings?
display ip
routing-table
statistics
□
OK
□
Not OK
□
Not related
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
ospf lsdb
command
multiple times to view the
age of routes and locate
the flapping route.
Is the OSPF status stable?
display ospf peer
□
OK
□
Not OK
□
Not related
View the up time of the
OSPF neighbor.
Routes
Is the default route
correct?
Are there any routing
loops?
tracert
debug ip packet
□
OK
□
Not OK
□
Not related
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
