From: darbyweaver@yahoo.com
Date: Sat Feb 16 2008 - 03:12:38 ARST
That pdf is priceless. Really I refer to it and I
find myself re-reading it every so often anyway.
There are more gems there and from the other vendors
too. And for free.
IPExpert offers free labs that used to be for sale -
I'd look into this one too.
Basically, there are enough free resources floating
around that mostly everyone who needs materials can
learn to master a lot of "fundamentals" before ever
buying a workbook or attending a class.
I love IE's tutorials on Anding/XoRing etc. and their
slides on FRTS for example among other things.
NMC has some nice work on TCL Scripts, Lab Strategy,
Native VLANs, Redsitribution, BGP, etc.
IPExpert has a wonderful assortment of free labs that
cover almost everything in wonderful detail. This is
one of the best contributions to the public domain
ever. These labs were coveted back in the day and
anyone who has the time ot register for a FREE account
has access to them and not just for RS either. Truly
a hidden gem. It has to be one of IPExperts best
advertisements and testament to their quality
materials.
All vendors usually offer a decent sample lab that is
fully challenging.
Lots of good stuff to get ready for the real deal.
--- Cielieska Nathan <ncielieska@gmail.com> wrote:
> Thanks for the input Darby. It is much appreciated.
>
> Have a great weekend,
> Nate
>
> On Feb 15, 2008, at 10:27 PM, Darby Weaver wrote:
>
> > Hmmm...
> >
> > 1. Learn to look at a topology
> > - Look for Layer 1 aka Physical Loops
> > - Look for Layer 2 aka Bridging Loops (SPT helps
> > here)
> > - Look for Layer 3 aka Routing Loops
> >
> > When I say look at a topology, I mean draw a
> diagram
> > and touch the interfaces. Somehow this seems to
> help.
> >
> >
> > 2. Next, ask yourself if you have a
> "Redistribution
> > Condition" - do you even have the possibility of
> > having a routing loop? Yes/No If you do then
> which
> > protocol has a higher AD and which protocol has a
> > lower AD? This is crucial to understanding how
> you
> > are going to deal with the routing loop.
> >
> > Remember some protocols naturally have an interior
> AD
> > and an exterior AD. One in particular does not:
> RIP.
> > Stop for a minute and think of the options.
> >
> > RIP | RIP
> > RIP | EIGRP
> > RIP | OSPF
> > RIP | BGP
> >
> > EIGRP | EIGRP
> > EIGRP | OSPF
> > EIGRP | BGP
> > EIGRP | RIP
> >
> > OSPF | OSPF
> > OSPF | EIGRP
> > OSPF | BGP
> > OSPF | RIP
> >
> > See anything special here? Remember AD is key.
> Learn
> > how to match all route use distribute lists,
> > route-maps and AD in general as tools to influence
> or
> > even mark in the case of Route-Tagging various
> routes.
> >
> > NMC has a nice little paper on this issue and it
> is
> > worth a trip to their website to find that gem of
> a
> > pdf.
> >
> > My best advice is to take each protocol variation
> and
> > play with it. Using the tools and techniques
> > recommended by your favorite vendor.
> >
> > Better to meet the enemy on your own terms. It
> may
> > take a good afternoon or so and or a couple of
> days
> > but if you do it methodically you should have it
> in a
> > relatively short amount of time.
> >
> >
> > 3. logging console
> > logging buffered 100000
> > logging on
> > debug ip routing
> > log adjacencies per protocol
> >
> > Let the router be the one to tell you that you are
> > having issues. Your job is to be more aware of
> the
> > tools you have to be able to influence the
> process.
> >
> >
> > Look at this pdf and lab it up. Thanks for NMC
> for an
> > example I know I use when my memory wants to fail
> me
> > on the matter or things do not seem to make sense
> any
> > more.
> >
> >
>
http://netmasterclass.net/site/articles/A%20Scenario%20with%
>
> > 20Multiple%20Redistribution%20Points.pdf
> >
> >
> >
> > --- Scott Vermillion <scott_ccie_list@it-ag.com>
> > wrote:
> >
> >> Hey Nate,
> >>
> >> I spent a disproportionate amount of my study
> time
> >> trying to get to that
> >> magical place where I could stare down any
> >> redistribution task of any
> >> complexity and just see what was going to happen
> >> underneath the hood (bonnet
> >> for our international list members). Never
> >> happened. What did happen was
> >> that 'debug ip routing' became a really good
> friend
> >> of mine. Also, just
> >> running full speed and smacking myself into that
> >> wall over and over again
> >> helped. I'm now to the point where I feel I can
> >> solve any redistribution
> >> task of any complexity - GIVEN ENOUGH TIME to do
> so.
> >> But sometimes it's so
> >> subtle that you're not likely to see it until you
> >> get some results from your
> >> debug. There were a few times when I even
> adjusted
> >> the AD of a given
> >> protocol or something like that just to see what,
> if
> >> any, impact it might
> >> have. That may or may not have sent me in a new
> >> direction.
> >>
> >> Don't let these discourage you like I did. Keep
> at
> >> it. Realize that no
> >> sane network engineer would really do what some
> of
> >> these lab scenarios are
> >> calling for. They're just meant to expose
> various
> >> (often times unintuitive)
> >> behaviors that you might at some point encounter.
> >>
> >> Regards,
> >>
> >> Scott
> >>
> >>
> >> -----Original Message-----
> >> From: nobody@groupstudy.com
> >> [mailto:nobody@groupstudy.com] On Behalf Of
> >> Cielieska Nathan
> >> Sent: Tuesday, February 12, 2008 7:45 PM
> >> To: ccielab certification
> >> Subject: Quick and dirty way to identify issues
> >> regarding redistribution
> >>
> >> Guys,
> >>
> >> So i ran into a brick wall last night which is
> IE's
> >> Workbook 3 Lab 8
> >> (Thanks Brians!). I thought i was really starting
> to
> >> get into the
> >> groove and this took me down a peg.
> >>
> >> With that said i actually ran into the section
> near
> >> the end where the
> >> redistribution happened. I was sitting in front
> of
> >> my routers just
> >> absolutely dumfounded and saved the configs and
> quit
> >> the lab early.
> >>
> >> I have listened to a few VOD's, did all of the
> basic
> >> lab scenarios
> >> regarding redistribution and even can deal with
> >> redistribution in a
> >> typical "i have two routers and they both have
> EIGRP
> >> and OSPF talking
> >> and you need to redistribute on both questions",
> so
> >> i think i got the
> >> BASIC jist of it down.
> >>
> >> Is there a methodolgy the truly experienced use
> to
> >> see the big
> >> picture with extremely complex redistribution.
> Maybe
> >> like a playbook
> >> one uses. I have read some folks tag their
> >> redistributed routes,
> >> others will allow redistribution on one router
> and
> >> immediately
> >> disallow on the second.. maybe a combination of
> >> both.
> >>
> >> Any suggestions on getting a truly in-depth
> >> understanding of
> >> redistribution would be extremely helpful right
> now.
> >> If that means
> >> labbing up some silly scenarios maybe someone can
> >> share a template of
> >> what i should be labbing up?
> >>
> >> How did you really learn redistribution.
> >>
> >> Regards,
> >> Nate
> >>
> >>
> >
>
This archive was generated by hypermail 2.1.4 : Sat Mar 01 2008 - 16:54:48 ARST