Re: OSPF quiz

Well done, Joe. The part that I found the most amusing was this:

R2:
interface GigabitEthernet0/0
 ip ospf network point-to-point
!

R4:
interface FastEthernet0/0
 ip ospf network point-to-point
!

R5:
R5#sh ip ro os
O E1 192.168.42.0/24 [110/84] via 192.168.25.2, 00:00:04, Serial0/2/0
O 192.168.24.0/24 [110/65] via 192.168.45.4, 01:15:03, Serial0/0/0
                     [110/65] via 192.168.25.2, 00:00:04, Serial0/2/0

Fun, isn't it? :-)

--
Marko Milivojevic - CCIE #18427
Senior Technical Instructor - IPexpert
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On Tue, May 31, 2011 at 12:54, Joe Astorino <joeastorino1982_at_gmail.com> wrote:
>
>
> *Really* nice brain teaser Carlos.B  For others that are curious, you may
> want to check out
> http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008009405a.shtml
>
> specifically, see below.B  Funny, now I remember writing evil lab questions
> and a blog about this very topic a year or so ago! Good to recall stuff like
> this from time to time!
>
>> The forwarding address is set to 0.0.0.0 if the ASBR redistributes routes
>> and OSPF is not enabled on the next hop interface for those routes. This is
>> true in the figure if Router 1 does not have OSPF enabled on the Ethernet
>> interface.
>
> These conditions set the forwarding address field to a non-zero address:
>
> OSPF is enabled on the ASBR's next hop interface AND
>
> ASBR's next hop interface is non-passive under OSPF AND
>
> ASBR's next hop interface is not point-to-point AND
>
> ASBR's next hop interface is not point-to-multipoint AND
>
> ASBR's next hop interface address falls under the network range specified in
> the router ospf command.
>
> Any other conditions besides these set the forwarding address to 0.0.0.0.
>
> --
> Regards,
>
> Joe Astorino
> CCIE #24347
> Blog: http://astorinonetworks.com
>
> "He not busy being born is busy dying" - Dylan
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