Re: mls Qos

I don't think the proctors pay attention to any such thing where they'd
look at it and say "Dude, what a dork this guy is, he/she shouldn't be a
CCIE". The test is NOT about real life.

Now, what I WOULD expect is that the test is designed in such a way that
if you simply randomly enabled mls qos and were not aware of the default
rewrite that will occur (either to 0, or to dscp 40 if you trust
incorrectly) that it would mess up QoS at downstream routers. That
would be a bitch to show since you don't really have hosts in the lab,
but it would be a REAL reason to say "ooo, you don't get these points
because it will not work the way you have it configured."

Example, if you had NO QoS on your lab (as if!), you would not get
counted off for putting mls qos on there.

Just my two cents. Beyond that (the extra penny), I think 'negligent'
may be a little harsh without putting a "situation" behind it, but
concept is correct!

*Scott Morris*, CCIE/x4/ (R&S/ISP-Dial/Security/Service Provider) #4713,

JNCIE-M #153, JNCIS-ER, CISSP, et al.

JNCI-M, JNCI-ER

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Evan Weston wrote:
> So you get in the exam and they ask you some OEQ about this stuff what are
> you going to say?
>
> "I know I should have a trust boundary here but nah it might upset the users
> because there's stuff on the network I don't know about"
>
> No, you're going to say "Im going to set my trust boundary here on the
> access ports" that's the textbook way of doing it and it's the way a CCIE
> should do it.
>
> On Darbys point I suppose I agree - if you enter in commands and you don't
> know what they do at this level then you deserve to fail.
>
> One thing Narbik said incidentally was that in close cases with borderline
> pass or fail where the proctors mark by hand it can come down to this stuff.
> i.e: does it look like the candidate has a lot of unneeded commands and look
> like they don't have a clue i.e: broadcast on every frame-relay map
> statement, confederation peers on every confederation member needed or not.
> So in the exam from that perspective alone I'd only put it on where needed.
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Dale
> Shaw
> Sent: Monday, 27 July 2009 11:40 AM
> To: Evan Weston
> Cc: Darby Weaver; CCIE Groupstudy
> Subject: Re: mls Qos
>
> Hi,
>
> On Mon, Jul 27, 2009 at 11:25 AM, Evan Weston<evan_weston_at_hotmail.com>
> wrote:
>
>> Yeah sure it will wreak havoc if you haven't set up the trust boundaries
>>
> on
>
>> your production network but whose fault it that? You just gave a better
>> example of negligent that the OP.
>>
>
> Darby's point was that turning on "mls qos", without understanding the
> consequences, is negligent. I wholeheartedly agree.
>
> If you break it down and isolate the argument to that simple scenario,
> it's a no-brainer.
>
> Networks aren't always (or can't be) managed perfectly, and sometimes
> there are long transitional states that require us to run a
> sub-optimal configuration. If you've never had to compromise on the
> technical integrity of a configuration because of some other
> hair-brained technical constraint or business decision, well, I'm
> jealous.
>
> An "optimal" configuration is not always the same for everyone,
> either: the viewpoint of a managed network service provider is
> different from an in-house managed network team. Anyway, we could go
> on and on about how flicking the 'mls qos' switch shouldn't break
> things in a perfectly designed/operated network, but that's not the
> point.
>
> cheers,
> Dale
>
>
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Received on Sun Jul 26 2009 - 23:36:05 ART