From: cciehksg (cciehksg@yahoo.com.sg)
Date: Tue Feb 12 2008 - 16:31:54 ARST
most of the theory will make sense when we lay it on the equipment
when we read for the first time, everything was so complex
second time, i felt i understand
third, i thought i knew it
later...after hands on and read many sources i understood that i dont understand
but at this point the puzzle become clearer
thats why we must refer to other sources
and strengthen our base knowledge
one who doesn't do Integral well might has weakness/gap in Differential.
problem with Differential could caused by lack of understanding of Limit,Algebra and Trigonometri.
that's what happen to me when reading halabi's for the first time
when i stucked, i just leave it for a while, try to read something else
don't push your self, get back later, re-explore the basic, play with your gear.
sooner or later you will nailed it.
anyway its ccie's development book, development takes time
so don't expect to understand it instantly - its not harry potter
even Scott Morris need twice to get his number :)
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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