Re: Troubleshooting Techniques

The documentation can serve to confuse us if we are not experienced.
In the virtual-link example we are discussing the we see they first
show us the output but have switched over to simple authentication and
while the experienced eye will catch this, a person taking the lab may
not and if not well prepared may make a mistake or fail to trust his
own experience and possibly lose the points associated with the task
in question.

r3.3.3.3# show ip ospf virtual-links

Virtual Link OSPF_VL0 to router 1.1.1.1 is up

!--- The status of the virtual link displays.

  Run as demand circuit
  DoNotAge LSA allowed

!--- This specifies that OSPF runs as a demand circuit over virtual links,
!--- and so link-state advertisements (LSAs) are not refreshed (not aged out).

  Transit area 1, via interface Serial0, Cost of using 128
  Transmit Delay is 1 sec, State POINT_TO_POINT,
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    Hello due in 00:00:01
    Adjacency State FULL (Hello suppressed)

!--- The status of the neighbor adjacency displays.

    Index 1/2, retransmission queue length 0, number of retransmission 1
    First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)
    Last retransmission scan length is 1, maximum is 1
    Last retransmission scan time is 0 msec, maximum is 0 msec
  Simple password authentication enabled

!--- The type of authentication that is enabled displays.
!--- The authentication type is simple password.

r3.3.3.3#

The final example shows us the desired output from the example and I
have omitted using it since it is as desired. While this is good for a
cookie-cutter example. It does may not help us when we are in the heat
of the exam and in no ways prepares us for the possiblity of creating
errors. In our training we must experience these trifles and learn to
spot them as quickly as possible.

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Received on Fri Sep 25 2009 - 19:38:31 ART