From: Edison Ortiz (edisonmortiz@gmail.com)
Date: Sun Jun 03 2007 - 19:12:55 ART
You will see OSPF adjancencies between a point-to-point and a non-broadcast
OSPF interface but they won't be able to exchange LSAs.
The correct answer is, broadcast OSPF interface in all devices and priority
0 on spokes.
__
Edison Ortiz
(Routing & Switching, CCIE # 17943)
----- Original Message -----
From: "Jason Guy (jguy)" <jguy@cisco.com>
To: <ccielab@groupstudy.com>
Sent: Sunday, June 03, 2007 5:53 PM
Subject: OSPF network types
> Hi everyone. I have been digging into OSPF a little today while working
> on a practice lab.
>
> The requirement asks to set up OSPF over the frame relay hub and spoke.
> Frame relay is running on the main serial interfaces. It says not to
> use neighbor statements under OSPF, and ensure the hub is always the DR.
>
> The default is ospf interface type is NON-BROADCAST, which does not
> allow the hellos to multicast. So I thought I can set the spokes to
> POINT-TO-POINT, and leave the HUB NON-BROADCAST but set the hello and
> dead timers to 10 and 30 respectively.
>
> This did bring the neighbors up and it does ensure the hub is the DR
> since the spokes cannot be DR. However the solution sets all routers to
> BROADCAST, and sets the ip ospf priority to 0 on the spokes OSPF
> interface to ensure the hub is DR. I am sure this is a valid solution
> as well.
>
> So, I did some searching on the achieve and surprisingly could not find
> much on this. So my question is this:
>
> Which method would be correct?
>
> In the real lab, is it fair to change the ospf timers, especially when a
> later requirement requires OSPF fast hellos set up?
>
> The reason I ask is I understand the exam is graded with a script. Is
> there multiple "correct" answers coded in it? Or did I miss a subtle
> clue that should have pointed me to using BROADCAST all around rather
> than a mix of network types?
>
> Thanks in advance,
> Jason
>
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