From: Moffat, Ed (EMoffat@fsci.com)
Date: Wed Apr 07 2004 - 09:54:41 GMT-3
Something I've been thinking about lately which, until now, I haven't really
decided whether it would be useful on the lab as a general practice. Perhaps
it is my sense that the labs wouldn't include something so devious as
"unknown" services existing on the network.
Perhaps debug ip packet would be a good tool to use in cases like these and
debug ntp packet as well for more specific scenarios. In this case, perhaps
there might be some sort of NTP server or broadcast server out there that we
could discover by using these tools. I use debug ip packet for problems I
know I'm having but haven't thought about just using it to see if there is
something I don't know about.
I begin to think of other things that could drive you crazy if you don't
discover them. My tendancy would be to think that if it isn't specifically
stated to configure X as the time source then it isn't really required and
perhaps the proctors would just be looking for proper configuration. That
would be a mistake. Maybe that's true but maybe it isn't. Best to ask the
question and consider all of the potential alternatives out there. Those of
you that have taken the lab will know whether I'm off base or not but
critical thinking about possibilities I suspect is half the battle.
I hadn't considered the problem of time-dependant scenarios but you can bet
I have now.
Thanks for the good tips.
-Ed-
-----Original Message-----
From: Richard Dumoulin [mailto:richard.dumoulin@vanco.es]
Sent: Wednesday, April 07, 2004 12:27 AM
To: Mark Rushby; ccielab@groupstudy.com
Subject: RE: Potential Lab Gotcha
I believe it depends on the platform. Some have a hardware clock,
--Richard
-----Original Message-----
From: Mark Rushby [mailto:mark@tisolutions.biz]
Sent: miircoles, 07 de abril de 2004 8:56
To: ccielab@groupstudy.com
Subject: RE: Potential Lab Gotcha
But if the router is rebooted then the clock settings will be lost!!!
Correct me if I'm wrong
-----Original Message-----
From: Packet Man [mailto:ccie2b@hotmail.com]
Sent: 06 April 2004 23:55
To: marvingreenlee@yahoo.com; packtmon@yahoo.com
Cc: ccielab@groupstudy.com
Subject: Re: Potential Lab Gotcha
Hey Marvin,
Excellent point. That's something I probably wouldn't have thought of
myself. Can you think of any other features that also require the clock to
be?
pm
>From: Marvin Greenlee <marvingreenlee@yahoo.com>
>Reply-To: Marvin Greenlee <marvingreenlee@yahoo.com>
>To: Tim Last <packtmon@yahoo.com>
>CC: ccielab@groupstudy.com
>Subject: Re: Potential Lab Gotcha
>Date: Tue, 6 Apr 2004 14:12:39 -0700 (PDT)
>
>This is also something that many people forget about with time-based
>acces lists. Without setting the clock, it won't appear as 'active'.
>
>Sincerely,
>Marvin Greenlee
>Network Learning, Inc.
>
>
> >
>--- Tim Last <packtmon@yahoo.com> wrote:
> > Hi guys,
> >
> > Was just doing a practice lab on various rtr mgmt tasks including
> > configuring some simple logging.
> >
> > When I was done, I compared my config to the solution config and
> > discovered I had left off something - something I would have
> > probably left off in the real lab had I not come across this in the
> > practice lab.
> >
> > What did I forget you wonder?
> >
> > Here was the task:
> >
> > Configure x.x.x.x as the logging server. Timestamp of all sent
> > messages should include date, time, msec and local time-zone.
> >
> > This took just a couple of commands and was pretty easy. But...
> >
> > I forgot to set the clock (or NTP) on the router.
> >
> > Somehow, I think those devious folks who design those labs would
> > have given me no credit for this section had I made this same
> > omission. And, when they graded my config's, they think to
> > themselves, "GOTCHA, Hehehe"
> >
> >
> >
> >
> >
>
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