RE: LAB Reachability

From: Howard Hooper (Howard.Hooper@dupre.co.uk)
Date: Mon Oct 27 2008 - 18:47:03 ARST


Hi Andrew,

Thank you for your reply, this is mock lab 4 I was doing.

I'm always a little unsure as to which point I should ask the proctor a
question through fear of looking stupid and giving the proctors the feeling
that "he wont be here for too long", but I'm starting to get more confident
now especially with things like this, I suppose it's all down to how I word my
question to them aswell i.e. "You've specified on the outline that I need to
have full reachability to outside networks but there is no task to fulfill
this requirement, would you be happy for me to redistribute into my IGP?"

Thanks again

Howard

________________________________

From: Andrew Dempsey [mailto:apdccie@gmail.com]
Sent: Mon 27/10/2008 19:34
To: Howard Hooper
Cc: ccielab@groupstudy.com
Subject: Re: LAB Reachability

Ask the proctor. For the IE labs I often have trouble determine where
reachability is needed as sometimes they specify it is not needed to none BGP
routers and other times the redistribution is simply not configured. Normally
in their solution guide they do not have you redistribute the BGP routes into
IGP unless of course a specific task requires it, which often contradicts the
general rules for the lab. As with most ask the proctor moments I reread the
question and try to determine what they are trying to test. For the workbook
it is fine and I think not having them tell you exactly what to configure all
the time in respect to the backbones keeps you sharp, if I ran into some real
ambiguity on a mocklab I would probably be upset. What mocklab was this? I
have taken 1,2,3,5 without any huge issues although on I think mocklab 3 I did
a real simple BGP to IGP redistribution in a similar situation to yours when
it was not needed.

On Mon, Oct 27, 2008 at 1:28 PM, Howard Hooper <Howard.Hooper@dupre.co.uk>
wrote:

        Hi,

        Please can anybody offer their advice as to what you would do in this
        particular lab situation?

        On the front page of the practice lab it clearly says "Upon completion, all
        devices should have full IP reachability to all networks in the routing
        domain, including any networks generated by the backbone routers"

        However when going through the lab document and carrying out the various
tasks
        I'd been given I came to a point where I had to setup bgp peering sessions
        between two of my three internal routers that were running bgp and two of
the
        backbone routers, after doing this I'd received a few networks from the
        backbone on each router so no problem there, but at that point the lab went
on
        to multicast.

        So I'm confused about, if I'm told every router on my internal network
should
        be able to see eachother plus the networks generated by the backbone routers
        but then due to the lab tasks given only two of my routers can actually see
        any networks from the backbone and I'm not told to do anything further, what
        would anybody recommend doing in this situation if faced in the lab exam?

        As per the lab guidelines I wasn't allowed to create any static routes, do
any
        policy routing, change or add IP Addresses so I redistributed between bgp
and
        the igp running on my internal routers, would I be marked down or lose
points
        for adding in redistribution that I'm not told to do?

        Any help or advice you can give for this situation would be great, thank you

        Also if anyone from IE is reading this post and happens to be grading my
        lab...I'm so sorry. I reached the decision to do redistribution within the
        last minute of the lab and after setting it up quickly between bgp and ospf
on
        one of the routers then quickly copying and pasting the commands to the
second
        router...time runs out...damn!this router is running RIP not OSPF!....you'll
        see what I mean when you get to R6...:o)

        I'm not intentionally stupid, the medication wears off quickly thats all :o)

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