Re: BGP Task Interpretation - would they be this anal?

From: sheherezada@gmail.com
Date: Mon Dec 17 2007 - 04:55:10 ART


I think this is the perfect example for "ask the proctor". I had this
kind of dilemma twice and the proctor clarified it every time.

Anyway, I noticed that in the real exam the BGP tasks are loosely
coupled - my bet is for #1.

Mihai

On Dec 17, 2007 1:01 AM, CCIEin2006 <ciscocciein2006@gmail.com> wrote:
> Maybe I should generalize my question a little bit?
>
> Reading through groupstudy posts on task interpretation there seems to
> be two schools of thought:
>
> School #1:
> Do exactly what the task states, nothing more.
> School #2:
> Look for the implicit requirements of the task and solve for those as well.
>
> What school of thought do those who have passed usually follow?
>
> Here's another example:
>
> Task states to guarantee 25% of bandwidth to web traffic going to server
> with IP 99.99.99.99.
> Lets say you configure your QOS policy perfectly, but your network doesn't
> have reachablilty to that IP (you couldn't get routing working properly for
> example).
> Considering your hosts cannot reach the web server you cannot reserve
> anything, so would you lost points for something like this?
>
>
>
> On Dec 16, 2007 10:31 AM, Darby Weaver <darbyweaver@yahoo.com> wrote:
>
> > Interesting question and interesting wording for the
> > interesting question.
> >
> > To safely remark on such a cunningly crafted question,
> > I can only say that one must read the task
> > word-for-word, using one's finger to ensure that not a
> > single word is missed or forgotten and then be
> > prepared to provide a well-proposed answer to such a
> > cunningly written, well-crafted interesting question.
> >
> >
> >
> > --- CCIEin2006 <ciscocciein2006@gmail.com> wrote:
> >
> > > Lets say you have two AS's connected via non-BGP
> > > speaking routers like this:
> > >
> > > R1 <--AS1
> > > / \
> > > R2 R3 <-- Non-BGP
> > > | |
> > > R4--R5 <--AS2
> > >
> > > Task states to configure AS2 to influence AS1 to
> > > prefer the BGP path to R4
> > > for certain networks and R5 for other networks.
> > > I know there are many ways to do this i.e MED, AS
> > > path prepend, summary,
> > > filter, etc..
> > >
> > > My question is it enough for AS1 to see the correct
> > > path in the BGP table or
> > > do you need to take steps to ensure the non-bgp
> > > speakers are taking that
> > > preferred path as well? I already have BGP
> > > redistributing into IGP so R2 and
> > > R3 have the routes in their routing table, I'm just
> > > not sure if I should
> > > waste time tweaking metrics to force them to route
> > > via that same preferred
> > > path?
> > >
> > > Would the graders be so anal to make sure each
> > > router in the path was
> > > following the preferred path or would they simply
> > > check the BGP table on AS1
> > > to make sure the path was preferred there?
> > >
> > > Thanks in advance,
> > > Nick
> > >
> > >
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