From: miken (miken@sisna.com)
Date: Fri Oct 24 2003 - 04:10:00 GMT-3
John,
This is my humble opinion.
Subif question:
If in doubt, ask your friendly, helpful smiling proctor... They are always
eager and willing to help you out =)
Depending on whether it is production or lab, I will use either the DLCI or
an identifying portion of the network address for the subif respectively.
For instance, DLCI 102 subif would be Serial 0/0.102. Or in the case of all
networks in your lab/pod are in the 192.168.x.y range with x being a portion
of the network number and y being the router/host, etc. Then I would use
Serial 0/0.x for the subif. Whatever makes good sense to you and helps you
keep things straight in your mind. At the 6.5 hour mark, you need all the
help in that area you can get.
OSPF priority:
I can't think of any reason why you would ever want your spokes to become
the DR or BDR for that matter in a hub/spoke NBMA configuration. Therefore,
you set the spokes to 0 so that they do not participate in the election
process. No need for extra typing to change the default priority from 1 on
your hub if you have set the spokes to 0. You will notice the requirement
was "elect R1 as DR". It didn't indicated anything about a BDR, etc. If you
know how OSPF works in NBMA, you will know that you only want or need a DR
and the spokes should never be given the opportunity to become such. Maybe
there is something about that in spot the issue.
I haven't looked at this particular sample lab. However, I just purchased
the Revision 3.0 DOiT Scenario Lab Book to get another perspective of labs
and they look pretty good up front. I'm just in the process of rewiring from
another vendor's physical configuration so I can start on these.
HTH,
Mike N
Original Message -----
From: "John Smith" <c00per_omers1@yahoo.com>
To: <ccielab@groupstudy.com>
Sent: Thursday, October 23, 2003 10:50 PM
Subject: Question on NetMasterClass DoIT lab posted previously to
groupstudy.
> I saw a posting early this week or late last week showing the link for the
free DoIT lab, from NetMasterClass. They have some Frame-Relay and OSPF
setup conditions in their doc. My question is from a CCIE lab perspective...
>
> If they say ( as in the DoIT lab under OSPF ), use logical interfaces they
then show the final cfg of interface serial s0/0.# as serial s0/0.123 I can
understand how they got it, but I would have used s0/0.1 or s0/0.2 so I'm
wondering would the actual CCIE lab give you the interface number or would
we have to guess. What would you choose to do, would you label it s0/0.123
the network number as indicated 123.1 / 123.2 and 123.3 or would you label
it so/o.1. I do realize that the routers are 1,2 and 3 and this could be the
convention as this subinterface points to R2 and R3 from R1. Any opinions,
or insight?
>
> The next question has to do with Ip ospf priority. Looking at the cfg they
indicate under OSPF - elect R1 as DR. The final cfg shows the spokes set as
0 and nothing set on the hub, so it is using the default value. Would you
all just set it on the spokes and not bother with specifically setting the
Hub as it would not have a priority of 0 or would you set it as a number
larger than the default setting? If they said using minimum cfg, then I'd
say don't set the hub, but I don't remember reading that condition in this
doc.
>
> Anyone have any opinions on this?
>
> John
>
>
>
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