From: Kelley Alan (kelleya@telecomsys.com)
Date: Fri Oct 24 2003 - 08:51:30 GMT-3
John,
I would say that it doesn't matter if you use s0/0.1 or s0/0.123. It
doesn't really matter. In the DoIt labs they use s0/0.123 for
reference to the network that the sub interface is associated to. So
using s0/0.123 is not a bad idea. If the network was 172.16.54.0 then
using s0/0.54 is a good idea so that you remember when looking at it
or if you need to go into the sub interface for configuration then you
don't have to do a show run to see what sub interface number you used.
As for the priority command, if you set the spokes to 0 then they will
never become DR and do not have to make any changes to the Hub. No
need in changing the hub to a higher priority than the default since
it is the only router that can be the DR. Remember (KISS)!! Keep it
simple stupid!! :-) Not calling you stupid of course, just a phrase!!
Alan
-----Original Message-----
From: John Smith [mailto:c00per_omers1@yahoo.com]
Sent: Friday, October 24, 2003 12:50 AM
To: ccielab@groupstudy.com
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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