Re: Issues in CCIE lab initial configs

All of the above is good advice. I'd like to add a couple of thoughts.

You have to take into consideration that all errors may not cause an
apparent problem. For instance if you just ran a few ping tests to test
connectivity, you might not see that certain packets are not going the way
they are supposed to, but they would respond.
If there is an ACL that is too permissive, it might not appear to be causing
a problem, but would cost points.

So the bottom line is to fully understand your given topology and then give
it a good look over to ensure the times mentioned above like
IP addresses / subnet masks
Interface types ( point-to-point versus point-to-multipoint )
Incorrect DLCI's or Frame LMI issues
Switch ports creating trunks where they should not be

The areas are far and wide. The only to be prepared for it is to be
prepared. Know and understand common troubleshooting commands ( show, debug,
use logging effectively ).

In my opinion, you will probably find that a lot of the problems that are
induced into the topology are probably things that you might have
inadvertently done while studying ( like making EIGRP links in a different
AS, or BGP links in the wrong areas, fat fingering an IP address / subnet
mask, etc. ).

Everyone that is "ready" for the lab should be confident that they will pass
the troubleshooting section.
Larry Hadrava
CCIE #12203 CCNP CCNA
Sr. Support Engineer  IPexpert, Inc.
URL: http://www.IPexpert.com

On Wed, Jun 3, 2009 at 2:24 PM, Jared Scrivener
<jscrivener_at_ipexpert.com>wrote:

> I'd do exactly the opposite and fix the errors first before starting my
> configuration. Just my opinion. Both approaches should work if you know
> what
> you are doing well. :)
>
> Cheers,
>
> Jared Scrivener CCIE3 #16983 (R&S, Security, SP), CISSP
> Sr. Technical Instructor - IPexpert, Inc.
> URL: http://www.IPexpert.com <http://www.ipexpert.com/>
> Telephone: +1.810.326.1444
> Fax: +1.810.454.0130
> Mailto: jscrivener_at_ipexpert.com
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Wouter Prins
> Sent: Wednesday, 3 June 2009 2:17 PM
> To: Naufal Jamal
> Cc: ccielab_at_groupstudy.com
> Subject: Re: Issues in CCIE lab initial configs
>
> Hello,
>
> I find it easier to just skip this part and fix the issues while doing the
> lab itself. I've noticed im much faster in seeing something that doesnt
> work
> when testing the connection/debugging then looking for something at the
> beginning in possibly big initial configs.
>
> Just my opinion ofcourse :P
>
> 2009/6/3 Naufal Jamal <naufalccie_at_yahoo.in>
>
> > Hey Guys,
> >
> > Can anyone give some examples of initial config issues that we may face
> > during
> > the lab? like someone told me when he was configuring frame relay he
> wasnt
> > getting the routes propagated across the peers.after scrutnising the
> > initial
> > config he saw a "no ip routing" command configured on one of the routers.
> > would appreciate if some one could share these types of common issues in
> > the
> > initial config that could save some time of ours..
> >
> > :)
> >
> >
> >
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> --
> Wouter Prins
> wp_at_null0.nl
> 0x301FA912
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Received on Wed Jun 03 2009 - 15:08:28 ART