From: Edward Balow (ebalow@hotmail.com)
Date: Sat Apr 12 2008 - 09:56:01 ART
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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