From: Tanvir Afsar (tanvir.afsar@gmail.com)
Date: Sat Apr 12 2008 - 10:43:39 ART
Hi,
Just want to add here that Practice labs usually follow the same
physical connections that are repeated again and again , in real lab a
diagram will help visualize whats going on and as Edward has pointed out
"A big picture of what's going on is generally required."
Tanvir
On Sat, 2008-04-12 at 08:56 -0400, Edward Balow wrote:
> I did not complete a L2 diagram at my first lab attempt and I did on my second
> attempt. I fully believe this is one of the contributing factors to my
> passing on the second try.
>
> The below information is talking about practice labs only to avoid NDA
> violations-------
>
> Once you get to the more complex practice labs, it should become more
> apparent. In short, you're going to end up with a lot of trunk links and
> access links and different vlans on different switches. Sometimes even dot1q
> tunneling.
>
> A big picture of what's going on is generally required. To make matters more
> complicated, sometimes information is left off. For example, assume you're
> told to put all switches in transparent mode but are not specifically told to
> create each VLAN on each switch. Obviously the vlans get created on the
> switches that have access ports on them. But what about intermediary
> switches? It's easily seen which vlans you need to create on the switches in
> the middle, and which ones you don't, based on a diagram.
>
> I'd say the "missing" information is one of the main reasons why a L2 diagram
> is helpful.
>
> My L2 diagrams looked something like this (again, practice lab, not real lab)
>
> r1 r2 r5
> |f0/1 |f0/2 |f0/5
> | | f0/21 trunk |
> ------------|----------------|------------------------|
> v5 sw1 v7 | | v5 sw2 |
> ------------| |-------------------------|
>
> pretty crude in ascii, but you should get the idea. You know exactly what
> trunk links go to what switch. You also know vlan 5 must trunk between sw1
> and sw2. However, you can remove/prune vlan 7 if I want. > Date: Sat, 12 Apr
> 2008 13:42:02 +0100> From: ccieaz@googlemail.com> To: ccielab@groupstudy.com>
> Subject: Lab Diagrams> > Hi all,> > This maybe a pretty stupid question, but
> here goes.> > I am just starting some of the practice labs now and I heard
> some> people draw a Layer2 diagram as well as the others. I don't understand>
> how/why this L2 diagram would help.> > My question is the L2 diagram just
> composes the switches and links> between them right? Whats the benefit behind
> this? Maybe its just me,> but the L2 side of things just seems easy to me.> >
> Has anyone got any example diagrams that they draw before a practice> lab that
> i could take a look at?> > Thanks> > Az> > > Pass the CCIE in six weeks,
> Guaranteed!> http://www.certscience.com/CCIE>
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