From: Carlos Trujillo Jimenez (nergal888@hotmail.com)
Date: Tue Feb 12 2008 - 18:34:27 ARST
It is hard at the beggining, but after doing so many times the workbooks
focusing bgp.. believe me, the bgp stuff cant leave your head :)
> Date: Tue, 12 Feb 2008 09:18:05 -0500> From: gwendel@gmail.com> To:
guy.jersey@gmail.com> Subject: Re: can't understand BGP Theory> CC:
ccielab@groupstudy.com> > You will need to understand this completely before
you should take the exam.> > On Feb 11, 2008 9:23 PM, Jersey Guy
<guy.jersey@gmail.com> wrote:> > > From Halabi's book, Internet Routing
Architectures, 2nd edition, page 167:> >> > *MEDs are somewhat handicapped by
aggregation scenarios in which providers> > announce a given CIDR block from
multiple locations in their network and> > suppress the smaller routes from
the block. Utilizing MEDs in this> > scenario> > could potentially result in
suboptimal routing because the more-specific> > routes of the CIDR block could
be scattered throughout the AS and MEDs> > associated with more-granular
routes are no longer available.> >> > When using MEDs to perform what's
commonly referred to as best-exit> > routing,> > some providers leak the
more-specifics of their CIDR blocks to select> > peers> > to remove the
offshoots introduced by aggregation. The problem with this> > is> > that
controlling the more-specific announcements is sometimes complex, and> >
failure to do so can result in some very suboptimal routing situations.> > *>
> I read the above two paragraphs five times but didn't understand it. Which>
> of the following is true:> >> > a) I have no choice but to understand this
stuff, to pass the lab. I need> > to> > understand *everything* in Halabi's
book, period.> > b) The lab is tough but not THAT tough. I can skip certain
convoluted> > sections of every topic and still manage to get by.> > c) Forget
it. I am not going to make it. MED is a piece of cake; what's so> > hard to
understand??> > d) I need to read "How to grow gray matter and raise IQ" book
before> > Halabi's.> >> > Thing is....how thoroughly do I need to pound away
at theory/reading> > before> > hitting the equipment, lab scenarios and
excercises?> >> >> > thanks, JG> >> >
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