RE: Little Johnny has some ospf questions for ccie students.

See inline below for what I found from the top of my head

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Johnny B CCIE
Sent: 14-Nov-09 02:27
To: groupstudy
Subject: Little Johnny has some ospf questions for ccie students.

These tasks are random rumblings from some various notes I am labbing
over tonight. Please don't flame me. I have to ask as some people here
are terribly rude. I am a ccie candidate who has to take a lab and I
am going to post study questions for myself and other students to
discuss. People with ccies should disregard if this is offensive. I
have a simple bet to win despite the lab changes.

1. In area 0, use an ospf network type that will force a dr/bdr
election but will use a unicast packet for hello and database
exchange.

2. Advertise a loopback is ospf but do not add it to any given area.
It must show up in a routing table as E2.

ANSWER: redistribute with "redistribute connected" and not with "network"
command.

3. The devices in vlan j should become adjacent if and only if they
use the clear test string of (jb?ccie?).

4. If there is no area 0 is ospf devices can ospf devices communicate? Why?

ANSWER: Yes. Within the area. See recent posts on groupstudy regarding
non-area0 network

5. Can you inject an ospf prefix into an ospf area without associating
that prefix to an ospf area? How?

ANSWER: that ia a bit vague for me. What you mean "not associating". Is that
a tech term ? Even an external route was redistributed in some area so it
could be considered as associated with it. I would say just redistribute it
as external route.

6. How would you advertise 10.20.40.0/22 as area 40 in ospf if you
could not add it directly under the ospf process?

ANSWER: Advertise it under interface.

7. How would you make 10.10.10.0 appear in area 10 as external Type 1?

ANSWER: On ASBR redistribute thru a route-map. In router map match ip
address and then set route type to type-1

8. If asked to not allow external routing information into area 10 how
can you do this without using any filtering?

ANSWER: area X nssa no-summary. External routes will be still accessible via
default gateway injected by ABR.

9. In which case would you use a nssa over a stub area in ospf, explain?

ANSWER: NSSA if there is an external network attached to that area.

10. If asked to not elect a dr between two routers how many ways might
you accomplish this?

11. If told to allow any external routing information into area 20 how
many ways can you do this?

ANSWER: I am not getting this. If there are already external routes in the
domain they will be accessible from everywhere.

12. What is the default network type on a frame relay network using
physical interfaces? How would you modify the dr and if required to
have a dr?

13. Can you configure ospf across a virtual-link? If so, how?

14. If asked to reduce the flooding and refreshing of the lsa in an
ospf domain how would you accomplish this?

ANSWER: max-lsa command under ospf process.

15. If asked to take a full frame relay mesh and configure ospf over
it so that if one or two but not more than two pvcs should fail then
all ospf adjacencies should be retained how many ways can we do this?

16. If asked to advertise 10.12.20.0, 10.13.20.0 and 10.14.20.0 into
an area using the most efficient mask how would you configure it? What
other information if any might you need? What are your possible
options?

17. If asked that a loopback should be learned by other routers with
its original mask length how many ways can this be done?

ANSWER: ip ospf network point-to-point

18. On a frame relay hub and spoke topology R1, R2, and R3 with R1 as
the hub if asked to use a network type that elects a DR but does not
use require a neighobr statement how would you configure this?

19. If asked to detect the loss of a neighbor twice as fast as the
default on a point-to-point link, a frame relay network link, and on
an ethernet link how would you configure each?

20. If asked to add a loopback to area 5 how can you do this if you
are not allowed to use a network statement or redistribute connected?

ANSWER: under interface: ip ospf X area 5

21. How do you solve a reachability problem if a host route is
generated by ospf?

22. Are non-area 0 paths preferred over area 0 paths? What if a
virtual-link is used?

23. What multicast address does a point to multipoint network type use?

24. If asked to form an adjacency with a peer that does not possess a
physical connection with another peer can this be done and if so can
you show me a configuration with how you did it?

25. How do you configure an ospf router to log adjacency changes?

26. How do you configure an ospf router to report names when doing a
show ip ospf database command?

27. How do you configure ospf hello interval to be 1/4 of a second to
provide fast convergence?

ANSWER: ip ospf dead interval with minimal argument ....

28. If asked to not limit retransmissions of database exchange and
hello packets how can you do this?

29. How can you configure an ospf domain to originate maximum
link-state metrics for all non-stub links?

30. If asked to redistribute any given loopback into any given area as
connected and then ensure it maintains its default metric type how
would you do this?

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Received on Sat Nov 14 2009 - 11:30:01 ART